WO1995012220A1

WO1995012220A1 - Mountable photovoltaic walkaround power pack

Info

Publication number: WO1995012220A1
Application number: PCT/US1994/012358
Authority: WO
Inventors: Tom Grayson
Original assignee: Tom Grayson
Priority date: 1993-10-28
Filing date: 1994-10-27
Publication date: 1995-05-04
Also published as: AU8093994A; TW304314B

Abstract

The apparatus (10) for powering a walkaround or portable device having a rechargeable circuit including a photovoltaic cell (PV) connected in series with a diode (D1) which is connected in series with a rechargeable battery (B). The apparatus has connector (30) extending from the battery poles for recharging the device. Different types of mounting techniques, e.g., VELCROTM, hinges and clips, pouch etc., for mounting the apparatus to the device.

Description

MOUNTABLE PHOTOVOLTAIC WALKAROUND POWER PACK FIELD OF THE INVENTION

The present invention relates to portable, hand-held electronic devices and appliances and, photovoltaic energy systems therefor; and, to advertising devices. BACKGROUND OF THE INVENTION

The use of portable or "wal around" type electronic devices such as radios, radio/tape and/or compact disk (CD) players, tape players, CD players,

"boomboxes", video cameras, pagers, cellular telephones, cordless telephones, radio transmitting and/or receiving sets (e.g., citizen's band radio; "walkie-talkies"), power tools (e.g., screw driver, drill, etc.) and the like has become widespread. Portable or "walkaround" devices rely upon batteries for power, for instance disposable batteries or rechargeable battery systems. When these devices are near a source of power such as an alternating current (A.C.) or an automobile, they can be powered or recharged by that source of power via an adapter. However, in these instances, the portable devices are usually stationary, defeating the purpose of the device (i.e., that it is portable).

The replacement of disposable batteries can be costly. Disposable batteries have a relatively short life before battery replacement is required. Likewise, rechargeable batteries have a relatively short life before recharging is required. Replacing or recharging batteries requires the burdensome tasks of removing and reinstalling batteries into the electronic device.

Further, disposable batteries present environmental and disposal problems. Disposable batteries must either by recycled or disposed of in landfills. Recycling is costly and, landfills are toxic. Indeed, the most common types of disposable or

"throw-away" batteries are AA (500 mAh) , C (1800 mAh) and D (4000 mAh) . The use of disposable batteries can cost approximately $892/kwh. The use of disposable batteries is therefore a very expensive proposition.

It would therefore be desirable to power portable or "walkaround" type electronic devices without the present reliance upon disposable or rechargeable batteries.

Reference is made to the following which are hereby incorporated herein by reference:

Mellors et al., U.S. Patent No. 3,921,049; Bobier et al., U.S. Patent No. 4,847,546;

Gordecki, U.S. Patent No. 4,880,712; Selinko, U.S. Patent No. 4,083,481; Toews, U.S. Des. Patent No. 277,844; Richaud et al., U.S. Patent No. 4,808,904; Thompson, U.S. Patent No. 4,539,516;

Sakamoto, U.S. Patent No. 5,200,685; Schaefer, U.S. Patent No. 4,709,201; Butler, U.S. Patent No. 4,667,142; Edmund Scientific Catalog #13N7, pp 177-179 (1993);

Solarex, "SA-0310, SA-0640 and SA-0680

Amorphous Silicon Modules", 6065-2 6/89 (product brochure) (1988) ; Solarex, "The Natural Source For Electricity, Photovoltaic Product Catalog" p.11;

Solarex, "Amorphous Silicon For Consumer and

Industrial Products", 6201-1 8/92 (product brochure) ; Taft Electronics 1988 Purchasing Guide p.251;

Siemens; M5 High Efficiency Solar Electric

Module

(1991); M10 High Efficiency

Solar Electric Module (1991) ; M10F Portable Solar

Electric Panel (1990) ; M20

High Efficiency Solar Electric Panel (1991) ; M55

High Efficiency Solar

Electric Module (1991); M65

Self Regulating Solar 5 Electric Module (1991); M75

High Efficiency Solar

Electric Module (1991) ; and

High Efficiency Solar

Electric Modules (1991) ; 10 Uni-Solar Product Brochure (undated) ;

Rayovac Consumer Product Catalog pp 10-11 (U-l) (undated) and Rayovac Renewal®

Reusable Alkaline Product 15 Information (w-194)

(undated) ; Product Data

Sheet Nickel Cadmium 615, size AA cell, CQA 1-31-91

(B); 20 Duracell Battery Specifications & Cross

Reference (1581-2) (1992); Texas Instruments "Spherical Solar Technology"

(presented at Solar 92

Conference) ; 25 Solec: MR-235 Military Man-Pack Solar Array

(undated) ;

Solarcharger (undated) ;

Solar Electric Power

Modules (undated) ; 30 Samsonite Solar Powered Attached

(undated) ; Web Photovoltaic Power, DW-001-3/91

(1991) and Solar Web

Products Photovoltaic Solar 35 Modules Technical Data

Sheet, DW-002-4/92 (1992); Mims, III, "Getting Started in Electronics", p 115 (Tenth Printing 1992; copr. 1983) ; and Real Goods Catalog, p 50-53, Fall 1993. Bobier relates to a solar panel output enhancement circuit and, Mellors is directed to a charging circuit for battery operated devices powered by solar cells.

Gordecki and Selinko relate to a clip for a portable device and, a battery housing; but, fail to teach or suggest employing photovoltaic cells to directly power a portable device, including when being used in a portable fashion, or, a photovoltaic cell power pack which retrofits onto portable devices. Toews, Ricaud, Thompson and Mims, III relate to solar, cell powered battery rechargers and, fail to teach or suggest employing photovoltaic cells to directly power a portable device, including when being used in a portable fashion, or, a photovoltaic cell power pack which retrofits onto portable devices. Further Toews, Ricaud, Thompson and Mims, III fail to overcome the problems associated with rechargeable batteries such as short battery life, or having to remove and reinstall batteries. Sakamoto relates to an adaptor for selectively connecting an external battery as a power source for a portable notebook type computer; but, fails to teach or suggest a photovoltaic cell power pack for a portable notebook type computer or, such a pack which is adapted to mount onto the portable notebook computer.

Schaefer is directed to a portable radio battery pack but, fails to teach or suggest a photovoltaic cell power pack for a portable radio, or, such a pack which is adapted to mount onto the portable radio.

The Solarex Literature relates to commercially available photovoltaic cells. While the "Amorphous Silicon" product brochure illustrates proposed applications for such cells, including applications in connection with a laptop computer, the "Amorphous Silicon" product brochure fails to teach or suggest how a photovoltaic cell power pack interfaces with a laptop computer (such that for instance the cells may fail to continuously provide power, for example they may fail to supply power during cloud cover) . Further, the "Amorphous Silicon" product brochure fails to teach or suggest a photovoltaic cell power pak which is adapted to mount onto a laptop computer. In fact, the illustration shows the photovoltaic cell to be approximately the size of the laptop computer, such that if they are operably connected, the resultant device does not appear to be portable.

The Siemens, Uni-Solar, Texas Instruments and Web Photovoltaic literature relate to various solar cells, modules or arrays, including certain products or proposed products such as an attache case, communications gear, office equipment and hand-held products but, this literature does not teach or suggest a photovoltaic cell power pack which is capable of being mounted to a portable device, such as by way of a retrofit, and, of continuously powering electronic devices. Indeed, there is no true disclosure or suggestion of how the products or alleged products operate; for instance, their circuitry is not disclosed.

The Edmund Scientific Catalog shows various photovoltaic cells and solar panel products. However, the solar panel products are not capable of continuously powering electronic devices, for instance, during temporary cloud cover. They are thus not capable of continuously powering a portable device. Further, the Edmund Scientific Catalog fails to teach or suggest a photovoltaic cell power pack which is capable of continuously powering electronic devices, even, for instance, during temporary cloud cover, and, which is adapted to mount to a portable device.

The Taft Electronics Purchasing Guide, and the Rayovac and Duracell literature relate to batteries and chargers such as Nickel Cadmium batteries; but, fail to teach or suggest employing these batteries in any photovoltaic cell power pack.

Butler relates to a three-way power source circuit for electronic equipment including a solar energy cell, a rechargeable battery and a disposable battery. Since Butler relies upon a disposable battery, Butler fails to teach or suggest the photovoltaic cell power pack of the present invention which avoids the use of disposable batteries and, does not rely upon two alternative power supplies (to the photovoltaic cells) . Further, Butler fails to teach or suggest how his circuit interfaces with a portable device or, any mounting means for his circuit. Thus, Butler fails to teach or suggest a photovoltaic cell power pack which is adapted to mount to a portable electronic device.

The Real Goods Catalog relates to various photovoltaic cell products, including product 11-118, a "3-6-9 Volt Charger" (page 50) which has multiple plugs, alligator clips and a selector switch which is said to "enable it to act as the power source for 3V, 6V or 9V appliances." However, this product is not shown to be adapted for mounting onto a portable device so as to allow the device to be operated in a portable or walkabout fashion. Accordingly, this product fails to teach or suggest any means or method for attaching a solar battery charger or power pack to a portable or walkaround device in a compact and user-friendly manner. Further, this product cannot power devices such as tape players directly, without the use of batteries or, power directly and without batteries 6V and 9V devices which draw more than 50 mA per hour. Also, this product has no provisions for intermittent cloud coverage for 6V and 9V circuits. Product 11-118 has user installable batteries and a user-accessible battery compartment. The device of the present invention not only includes mounting means but is preferably dimensioned so as to aesthetically mount onto a walkaround or portable device (so that the present invention may be used when the device is being using in the portable or walkabout mode) , including preferably having only one plug/wiring connector. Additionally, the present invention preferably has a sealed battery compartment.

In view of the foregoing, a photovoltaic cell power pack which is adapted to mount onto or retrofit portable electronic devices and, which continuously powers such devices but does not include or avoids the use of disposable or removable rechargeable batteries, has not been heretofore taught or suggested. In view of the widespread use of portable electronic devices, and the disadvantages of disposable and removable rechargeable battery systems there is a great need for a photovoltaic cell power pack which fits onto portable electronic devices, and continuously powers such devices, even when being used in a portable fashion, without having to rely upon disposable or removable rechargeable batteries. OBJECTS AND SUMMARY OF THE INVENTION

It is an object of the invention to provide a photovoltaic energy source for walkaround or portable devices, including when such devices are being used in a portable fashion. It is a further object of the invention to provide such an energy source which can easily and aesthetically mount to walkaround or portable devices.

It is an additional object of the invention to provide such an energy source which can easily and aesthetically mount to walkaround or portable devices and be used for advertising purposes. It is another object of the invention to provide such an energy source which does not necessarily rely upon disposable or removable rechargeable batteries. It is an object of the invention to provide such an energy source which can continuously power walkaround or disposable devices, employing a rechargeable battery or a minimum amount of rechargeable batteries in conjunction with a photovoltaic cell or cell array, whereby the photovoltaic cell or array recharges the battery or batteries, without reliance upon the user interfacing with the energy source.

It is a further object of the invention to increase overall operating time and to reduce the overall cost of using walkaround or portable devices and, decrease the general use of disposable batteries, thereby reducing environmental or disposal problems associated with conventional disposable or "throw-away" batteries. It is yet another object of the invention to provide a method for powering walkaround or portable devices employing a light source such as solar energy, e.g., direct or diffuse solar energy or radiation, as well as man-made or artificial light.

It is yet a further object of the invention to provide a kit for mounting a photovoltaic energy source to a walkaround or portable device.

And, it is an object of the invention to provide a walkaround or portable device in combination with photovoltaic energy source.

These and other objects of the invention are surprisingly addressed by the present invention which provides an apparatus for powering a walkaround or portable device comprising: a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery; means for connecting the battery to the walkaround or portable device extending from the poles of the battery so that the apparatus supplies power to the device and/or recharges the battery; and, means for mounting the apparatus to the device.

The invention further provides a method for powering a walkaround or portable device comprising: connecting an apparatus for powering a walkaround or portable device to the device so that the apparatus supplies power to the device and, mounting the apparatus to the device; wherein the apparatus comprises a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery, means for connecting the battery to the walkaround or portable device so that the apparatus supplies power to the device and/or recharges the battery and, means for mounting the apparatus to the device. The present invention also provides a kit for powering a walkaround or portable device comprising: an apparatus for powering the device comprising a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery having means for connecting the battery to the device so as to power the device and/or recharge the battery; and, means for mounting the apparatus to the device.

The present invention additionally provides the combination of a walkaround or portable device and a photovoltaic power source which is connectable or connected and mountable or mounted to the device wherein the power source is an apparatus which comprises a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery, means for connecting the battery to the walkaround or portable device so that the apparatus supplies power to the device and/or recharges the battery and, means for mounting the apparatus to the device.

The apparatus can include a resistor between the diode and the photovoltaic cell. However, it is presently preferred not to employ the resistor. The means for connecting the apparatus to the device can comprise jack means, for instance a male member from the apparatus to insert into a female receptacle on the device for receiving power such as from an A.C. power supply (or A.C. power supply converter). Of course, a male member can extend from the device and insert into a female receptacle on the apparatus. The means for connecting the apparatus to the device can also comprise alligator clips or wires or the like for hard wire attachment of the apparatus to leads in a battery receptacle of the device. Self-adhesive backed thin metal foil can also be employed for hard wire attachment.

The means for mounting the apparatus to the device can comprise removable means such as "hook means"; for instance mating VELCRO^™ strips each of which are respectively mounted or mountable on the apparatus and device. Alternatively, the mounting means can comprise means to mount each of the apparatus and device to hinge means such that the apparatus attaches to the device by means of the hinge so that the apparatus in hingedly attached to the device. This movable mounting of the apparatus to the device allows for user access to features of the device; for instance, the receptacle for insertion of a cassette tape, dials, etc. "Hook means" such as VELCRO^™ can be employed for either or both of the means for mounting each of the apparatus and device to hinge means.

Of course, more permanent means such as adhesive, glue, glue strips, self adhesive backed plastic clip strips, or tape can be used as mounting means.

Preferably the rear side of the photovoltaic cell and, the device are formed of plastic for better adhesion. Glues which are useful in the practice of the invention include silicon and epoxy adhesive, organic based, e.g., methylene chloride based, adhesives.

The photovoltaic cell can be a cell array, which is dimensioned to be compatible with a typical walkaround device. Walkaround devices can vary in dimension but walkaround radios or radio/cassette players are typically dimensioned about 1 3/8 inches x 5 1/2 inches x 3 1/2 inches. And, the photovoltaic cell power pack of the invention can typically be dimensioned about 6 inches x 2 inches x 1/4 inch with a 1 inch protrusion beyond the 1/4 inch for 3/4 inch of the 6 inches. The photovoltaic cell can be any suitable cell or array. The cell or array, without wishing to necessarily be bound by any one particular theory, should preferably act as a heat sink or load-shedding device; for instance wherein there is drop off as temperature rises. Such cells or arrays preferably have glass, usually thin glass on the front, absorber surface. The resister, diode, and rechargeable battery can be positioned adjacent to the mounting means at the underside of the photovoltaic cell or inside the existing battery (rechargeable or disposable) compartment. Alternatively, the photovoltaic cell can be alongside the resister, diode and rechargeable battery; for instance on each of the plates or halves of the hinge means. This allows for aesthetically pleasing mounting.

The walkaround or portable device can be any suitable device, including a radio, radio/tape and/or compact disk player, tape player, CD player, "boombox", video camera, pager, cellular telephone, cordless telephone, radio transmitting and/or receiving set, power tool and the like. Preferably the connection between the device and the apparatus of the invention is such as to accommodate left or right hand use; for instance, by the point of connection to the device being off the center line of the device (to the right or left of an imaginary axis running through the device) .

The photovoltaic cell can include writing upon it. the kit can include instructions for installation and/or use. These and other embodiments and objects of the invention are disclosed or are obvious from the following detailed description. BRIEF DESCRIPTION OF DRAWINGS In the following detailed description, reference is made to the accompanying Figures wherein:

Figs. 1, 1A to IF show schematics for photovoltaic power packs with portable or walkaround device of the invention; Figs. 2, 2A and 2B show a first embodiment of the invention looking down onto the back of the photovoltaic cell and, mounted on a portable device;

Figs. 3A to 3E show a second, alternative embodiment of the invention, with Fig. 3A showing a top plan view. Fig. 3B showing the embodiment of the invention mounted to a portable or walkaround device. Fig. 3C showing an exploded view. Fig. 3D showing a partial, side cross-section, through the battery compartment; and, Fig. 3E showing a partial, top cross- section through the battery compartment;

Figs. 3F and 3G show an alternative embodiment of the embodiment in Figs. 3A to 3E in top plan view;

Figs. 4A to 4G show a third, alternative embodiment of the invention, with Figs. 4A and 4B respectively showing top plan and exploded views, Figs. 4C and 4D respectively showing top plan and bottom views, and, Figs. 4E to 4G showing attachment of the embodiment to a walkaround or portable device;

Fig. 5 shows a fourth, alternative embodiment of the invention hard-wired to a portable or walkaround device;

Figs. 5A and 5B show means for "hard-wiring";

Figs. 5C shows a means for powering a portable or walkaround device having an apparatus of the invention or for recharging batteries of an apparatus of the invention by an A.C. adaptor or converter or the like; Fig. 6 shows a generic embodiment of the invention with phantom writing on the photovoltaic cell;

Figs. 7A to 7K show various portable or walkaround devices with an apparatus of the invention attached and connected thereto;

Figs. 8A to 8C show apparatus of the invention worn by a user;

Figs. 9 and 9A to 9D show an A.C. adapter/charger in plan view (Fig. 9A) , and in conjunction with apparatus of the invention in side view (Figs. 9A, 9B) , as well as an extension cord (Fig. 9C) and a plug (Fig. 9D) ;

Figs. 10 and 10A show apparatus of the invention with a device which is made to receive the apparatus of the invention (exploded plan and side views) ;

Figs. 11A, 11B, and 12A to 12D show apparatus of the invention employing a thermoplastic, heat setting hinge and/or an attachment clip; Figs. 13 and 14 show apparatus of the invention in the form of a bag; and,

Fig. 15 and 15A shows an indoor/outdoor power supply and battery charger (back and plan views) . DETAILED DESCRIPTION The present invention is directed to a photovoltaic cell power pack for powering walkaround or portable devices. The power pack includes a photovoltaic cell or cells connected in series to a resistor which is connected in series to a diode connected in series to a rechargeable battery, means for connecting the battery to the walkaround or portable device so that the power pack powers the device and/or recharges the battery and, means for mounting the power pack to the device. Thus, the power pack performs two functions: powering the walkaround or portable device and, recharging the rechargeable battery, thereby allowing for operation of the device when there is no light, for instance, during temporary cloud cover or, during extended periods of darkness, depending upon the rechargeable battery. The photovoltaic cell can also provide a trickle charger, such as a constant trickle, to help battery deterioration.

For a photovoltaic cell power pack having a rechargeable battery to efficiently and satisfactorily operate, three variables or "floating thresholds" preferably should maintain an equilibrium. The first variable or floating threshold is load voltage requirements. The second variable or floating threshold is solar insolation and ambient temperature. The third variable or floating threshold is the battery system charging load and charging conditions. Considering a typical walkaround radio/cassette player which ordinarily employs two "AA" batteries, each with a 1.2-1.5 volt, 250-400 mAh capacity, the load voltage requirements float up and down based on changing load conditions such as audio volume, tape motor play, fast forward, rewind, record, and pause conditions or use of the radio portion, etc. as well as operating temperatures of individual components. Solar insolation and ambient temperature, as well as changing load conditions, create a floating threshold for the photovoltaic cell system which also has minimum and maximum operating values. The battery system also has a floating threshold influenced by changing load and charging conditions. These threshold values all change based on their dependent relationships. The following list defines design parameters of a typical example.

PV cell: Solarex SA-0640, Batteries: Sanyo 500AA, 1 Sun 1.5 AM B.C. Appliance: Walkman™ Radio VOLTS AMPS Kick in voltage 2.25 10mA Drop out voltage 1.75 10mA

Nominal voltage 3.0 40mA

Maximum voltage 4.5 55mA

Solar output min 1.5 .10mA

Solar output nom 7.5 .40mA Solar output max Open circuit Short circuit Solar loaded run min Solar loaded run nom Solar loaded run max Solar loaded chrg min Solar loaded chrg nom Solar loaded chrg max Solar charge rate min Solar charge rate nom Solar charge rate max

Overcharge protection, without wishing to necessarily be bound by any one theory, is achieved preferably by the pv cell acting as a load shedding resistance device as well as the batteries so acting. This feature is dependent on specific cell characteristics and, preferably the pv cell has a glass fact to so act. Variables such as battery temperature, pv cell temperature, blocking diode temperature and system equipment temperature interact with component nominal design parameters during different single or multiple modes of the "Walkman™" operation.

The appliance (device) kick in load takes priority with the charge function second. This load is met from the batteries when light is not present. The pv cell acts as a thermal resistance load shedding device preventing the overcharged battery from exceeding the maximum operating voltage of the portable or walkaround device. Under certain conditions, the batteries also can act as a thermal resistance load shedding device.

In the charge mode, the photovoltaic cell resistance load shedding characteristics prevent overcharging batteries. As the battery's fill line voltage level is exceeded, the pv cell increases in temperature, reducing its efficiency so that only a trickle charge continues. A fresh or new battery will memorize parameters allowing efficient operation and quick charge time providing parameters stay within the battery's specifications. The fill line will take extra time to reach during the first charge, yet will require less time to reach (i.e., to charge) after the initial charge.

The pv cell overcharge shunt effect will occur more as the new battery overcharges initially until the battery adjusts to its lesser ability to overcharge, allowing the pv cell to take the regenerative load.

The type of pv cell which can be used in the practice of the invention are preferably amorphous silicon modules such as Solarex^™ SA-0640 or mini- laminates such as Solarex^™ MSX-005 which has a glass superstrate with laminated EVA-Tedlar encapsulation, is weatherproof and, includes MEGA MSX semi-crystalline cells. Cells which use a fin heat transfer and glass heat sinking superstrate technology and that are durable enough to withstand direct sunlight without losing output over a long period of time can be used. Cells which deteriorate rapidly when exposed to direct sunlight and fail upon low short circuit voltage are not preferred in the practice of the invention. Commercially available photovoltaic cells such as those from Siemens, Uni-Solar, Texas Instruments, Solec, Web Photovoltaic or Solar Web, AstroPower and Solar Cells, Inc. may also be employed or adapted to be employed, without undue experimentation from this disclosure, in the practice of this invention. The Solarex products are presently preferred. ELECTRICAL SPECIFICATIONS OF SA-640 (from Product literature)

Voltage at design operating point (V_op) Current at design operating point (l_op) Open-circuit voltage (V_oc)

Short-circuit voltage (l_sc) 55 mA

Temperature coefficient of voltage -30 mV/°C Temperature coefficient of current 50 μA/°C

* This data is based on measurements made at Standard Test Conditions (STC) , which are:

* Illumination of 1 kW/m² (1 sun) at spectral distribution of AM 1.5

* Module temperature of 25°C

The SA-0640 exhibits a generic I-V curve (current vs. voltage, I_op, I_sc, V_op and V_oc intersecting at a design operating point; I_op a straight line, V a straight line, I_sc-V_oc a curve) and, drop off as temperature increases.

As to the MSX-005, the following are the power specifications and physical description (from product literature) :

The battery can be any suitable Nickel Cadmium battery such as a Sanyo N-500AA or a Rayovac or Duracell rechargeable battery.

Typical resistors for practice of the invention include a carbon type having the following characteristics:

1/4 watt + 10 c/o accuracy of full value. The diode itself can be used for a voltage dropping function. Typical diodes for practice of the invention include a silicon type having the following characteristics: peak inverse 0.50V, forward voltage drop at forward current of 1.6V at 1A with reverse current of lOμA.

Of course the specifications for the components of the invention can be adjusted by one skilled in the art, from this disclosure, without undue experimentation. taking into account typical factors, such as the load requirement of the device to be powered, for example, if the device requires a plurality of "C" or "D" batteries, as opposed to "AA" batteries, running currents and voltages, usage periods and device characteristics. Turning to the Figures, Fig. 1 shows a schematic for a photovoltaic power pack with a portable or walkaround device. In Fig. 1, PV is the photovoltaic cell or array. R-l is the resistor. D-l is the diode. B is the battery. And, L, the load, is the walkaround device. Note that the photovoltaic cell is connected in series to the resistor which is connected in series to the diode which is connected in series to the load and battery. Fig. 1A shows a typical circuit with the transistor "Ql" collector controlling the PV output to the load or charge or battery to load, whichever is optimum, using preset values.

Fig. IB shows a typical circuit with gate "G" selecting PV output to load or charge or battery to load, whichever is optimum, using adjustable values.

Fig. 1C shows a typical A.C. adapter/charger (see Figs. 9, 9A and 9B) , with either a 110-125 V.A.C. or 220-230 V.A.C. primary coil. Figs. 2, 2A and 2B show a first embodiment of the invention. In Fig. 2, apparatus 10 is shown without mounting means and, with the components exposed. The view is looking down onto the back photovoltaic cell 15 which is generally rectangular in shape. At each long end of photovoltaic cell 15 is pv junction 20 and 20'. Between pv junctions 20' and 20, respectively, and connected in series thereto are resistor 22, diode 24 and battery 26, preferably set along the center of the back of photovoltaic cell 15. Extending from pv junction 20' is cable 29. PV junction 20 is connected to cable 29 by wire lead 28, which runs around half of the periphery of photovoltaic cell 15. Cable 29, at the end opposite its connection to pv junction 20' and wire lead 28, terminates at male plug 30, which is adapted to insert into a female power receptacle on a walkaround or portable device. Cable 29 is comprised of two leads (not shown) ; one for each pole. One of those leads runs from junction 20' to plug 30; the other from lead 28 (junction 20) to plug 30. The resistor can be a 3352 resistor and, the diode an IN34 diode. The photovoltaic cell can be an SA0650. The battery can be a flat battery such as a 3V rechargeable battery whereby apparatus 10 can power a walkaround radio and accommodate powering such a radio during temporary cloud cover. Of course, a battery having additional storage capacity can be employed instead. Further, if the device can handle it, the resistor can be omitted and this is a preferred embodiment.

In Fig. 2A, cover 32 is in place over the components of apparatus 10. Cover 32 has surface 33 which can be a VELCRO^™ surface; the mate is attached to the walkaround device so that apparatus 10 is removably attached to the device. Cover 32 can be a plastic cover affixed by an adhesive or by glue, so as to preferably provide a water-tight or substantially water-tight seal over the components. Fig. 2B shows apparatus 10 mounted to device 4. Device 4 can be a portable or walkabout radio.

Figs. 3A-3E show an alternative embodiment of the invention, apparatus 10', with Figs. 3A and 3B showing top plan views of apparatus 10', by itself and mounted to a portable device, respectively; Fig. 3C showing an exploded view of apparatus 10'; Fig. 3D showing a partial, side cross-section through the battery compartment; and, Fig. 3E showing a partial top cross- section through the battery compartment. Considering Figs. 3A to 3E, apparatus 10' includes photovoltaic cell 15 having pv junctions 20 and 20' at opposite, long ends of generally rectangular photovoltaic cell 15. Wire leads 28 and 28' run from each of the pv junctions 20 and 20', respectively and terminate at terminals 5 and 5', respectively.

Apparatus 10' further includes hinge member 35. Hinge member 35 includes generally rectangular plates 35A and 35B connected to each other along a long edge of each by spring member 36. Hinge 35 and spring member 36 can be a preflexed hinge 3536 (Fig. 3F) . Rechargeable battery receptacle 26 is mounted to the front face of plate 35B preferably by an adhesive. Within receptacle 26' are rechargeable batteries 26 connected in series. Receptacle 26' is preferably seated so as to prevent access by both the user and the elements, (e.g. water) . Wire leads 28A and 28A' run respectively from each pole of batteries 26. Wire leads 28A and 28A' terminate at terminals 5A and 5A' , respectively. Between terminal 5A and a pole of batteries 26 are resistor 22 and diode 24. Cable 29' comprises leads 29A and 29B attached to leads 28A and 28A', respectively, with lead 29A attached to lead 28A after resistor 22 and diode 24. If desired, the resistor can be omitted which is the preferred embodiment. Cable 29' terminates at plug 30' which fits within female receptacle 42 of walkaround device 40. Female receptacle 42 is positioned at the lower portion of a side of the walkaround device 40 which is perpendicular to both faces of device 40 to which plates 35A and 35B are mounted.

The underside of photovoltaic cell 15 has VELCRO^™ strip 33A which mates with VELCRO™ strip 33B on the top of plate 35A so as to attach photovoltaic cell 15 to the top of plate 35A. Plate 35B, at its underside has a VELCRO™ strip 33C which mates with a strip (not shown) attached to a first face 41A of a walkaround device. Likewise, the underside of plate 35A has a VELCRO™ strip (not shown) which mates with a strip (not shown) attached to a second face 41 of a walkaround device. The first and second faces 41A and 41 are substantially perpendicular to each other, as are plates 35A and 35B of hinge member 35. This series of VELCRO^™ strips allows for removable mounting of apparatus 10' to walkaround device 40. In operation, terminal 5 is connected to terminal 5A and, terminal 5' is connected to terminal 5A'. Walkaround device 40 can be a radio/cassette or cassette player such that face 41 lifts off of device 40 for insertion of a cassette, as shown by double-headed arrow 41'. Plate 35A can lift off of face 41 to assist in allowing the user access to controls of device 40 or, insertion of a cassette, as shown by double-headed arrow 41".

Thus, apparatus 10' has photovoltaic cell 15' attached to hinge member 35 at the upper face of plate 35A, battery receptacle 26' and its contents attach to hinge member 35 at the upper face of plate 35B and, hinge member 35 attaches at the lower faces of plates 35A and 35B to perpendicular faces 41 and 41A of device 40. In the embodiment of Figs. 3A to 3C the batteries can be situated on plate 35B; the diode can be situated below battery receptacle 26' along with the resistor; and, the photovoltaic cell can be attached to hinge member 35. Turning to Figs. 3F and 3G, as mentioned earlier, the hinge 35 and spring member 36 can be a preflexed hinge 3536. In Fig. 3F, alternative apparatus 1030 includes the various components of apparatus 10', except for the substitution of preflexed hinge 3536 for hinge 35 and spring member 36. This allows receptacle 26' and hinge 3536 to be molded, e.g., a one piece molding 3500, comprising the receptacle and hinge 3536. This molding can be of a plastic, thermoplastic, elastomer or rubber such as polypropylene, acrylic or silicone. The molding includes slot 3501 into which male member 3502B fits (Fig. 3G) . Clip 3502 is generally rectangular in shape and has adhesive face 3502A opposite male member 3502B. Male member 3502B and adhesive face 3502A are substantially parallel to each other. Adhesive face 3502A is suitably placed on a face of device 40 with male member 3502B extending substantially parallel to that face. Apparatus 1030 then attaches to device 40 by mating male member 3502B with slot 3501. Of course, slot means may be positioned on the device and a male member positioned on the apparatus of the invention, allowing for a female member of the device to mate with a male member on the apparatus. Figs. 4A to 4G depict apparatus 10". Figs. 4E to 4G illustrate attachment of apparatus 10" to walkaround or portable device 40'. Figs. 4C and 4D respectively, show a top plan view and a bottom plan view of apparatus 10" so as to illustrate dimensions. Figs. 4A and 4B show a top plan view of apparatus 10" and, an exploded view thereof, respectively. Apparatus 10" has generally rectangular photovoltaic cell 15". Fig. 4C on the underside of photovoltaic cell 15", is generally cylindrical rechargeable battery receptacles 26", from which, at a long end of apparatus 10", at about the center (widthwise) and at about the point of connection between photovoltaic cell 15" and battery receptacles 26", extends cable 29" which terminates at plug 30". Dimensions A and B together (Fig. 4D) , the length of apparatus 10", is about 6 inches, with dimension B, the length of battery receptacles 26" about 3/4 inch and, dimension A, the length of apparatus 10" up to receptacles 26" about 5 1/4 inches. Dimension C, the width of apparatus 10", is about 2 inches. The thickness of photovoltaic cell 15" (dimension HI) is about 1/4 inch and, dimension H, the height of receptacles 26" off of photovoltaic cell 15" is about 1 inch.

Considering Figs. 4A and 4E to 4G in conjunction with Figs. 4C and 4D, bottom face 33' of apparatus 10" includes VELCRO^™ strip 33A' which mates with a corresponding strip attached to a face of a walkaround or portable device. Fig. 4E shows the attachment of mating VELCRO^™ strip 33B' to a first face of device 40' and, female receptacle 42 on a second face of device 40' which is substantially perpendicular to the first face. Receptacle 42 is positioned near the bottom of that second face. Fig. 4F shows alignment of apparatus 10" with device 40' so as to mate VELCRO^™ strips 33A' and 33B' . Fig. 4G shows apparatus 10" mounted onto device 40', with plug 30" inserted into female receptacle 42 of device 40'. Considering the exploded view in Fig. 4B, battery receptacles 26" are comprised of side-by-side receptacles 26A" and 26B", each of which contains a battery 26. A cover (not shown) can snap fit or be glued over receptacles 26" so as to provide a water-tight or substantially water-tight battery compartment. Batteries 26 are.positioned opposite each other pole-wise within each of receptacles 26A" and 26B". Receptacles 26A" and 26B" are connected in series by lead 26A. Lead 28A' runs to pv junction 20' positioned on photovoltaic cell 15" at the long end thereof, the end of attachment of generally cylindrical receptacles 26" to photovoltaic cell 15". At the other long end of photovoltaic cell 15" is pv junction 20 from which runs lead 28". Lead 28" runs to lead 29A'. Between leads 28" and 29A' are, respectively resister 22, diode 24 and, the connection thereto of lead 28A which runs from battery receptacle 26B". Thus, apparatus 10" has pv junction 20, lead 28" running from pv junction 20 to resistor 22, lead 28" continuing from resistor 22 to diode 24 and, lead 28" continuing to the point where lead 29A' and lead 28A connect to lead 28", just beyond diode 24. Lead 29B' runs from pv junction 20' to plug 30" and, lead 29A' runs from the point of connection with leads 28A and 28" to plug 30". Leads 29A' and 29B' comprise cable 29" running from photovoltaic cell 15" to plug 30". Plug 30" is adapted to mate with a female receptacle (not shown) of a walkaround or portable device. In the apparatus of Figs. 4A to 4G, the photovoltaic cell can be a solarex SA0640 cell; the batteries can be 0.950 Amps at 1.24 volts each; the resistor can be variable ohms, 1/4 W; and, the diode can be an IN 4001 silicon diode. The resistor can be variable because the other components in the circuit can have resistance and it is within the ambit of the skilled artisan to select a resistor. The resistor can also be omitted if desired, which is the preferred embodiment. Further, a clip attachment means, as shown in Figs. 3F and 3G can also be employed instead of VELCRO^™.

Fig. 5 shows yet another embodiment of the invention wherein apparatus 10"' is hard-wired to portable or walkaround device 400. The hard wiring is preferably removable (attachable and detachable) and, solderless. Portable or walkaround device 400 has battery compartment 26"' containing rechargeable batteries 26 in series between terminals 260 and 260'. A notch 27' is placed in the lid of battery compartment 26"' creating portions 27 and 27A of the lid. Into notch 27' runs leads 28"' and 28A"' which connect respectively to terminals 260' and 260 at connections 5" and 5A". Connections 5" and 5A" can be alligator clips or solder or flexible metal (see Figs. 5A, 5B) . A rubber gasket (not shown) may be inserted around leads 28"' and 28A"' so as to assist in keeping battery compartment 26"' water-tight or substantially water-tight. Lead 28A"' runs to pv junction 20" on one end of photovoltaic cell 15"' and, lead 28"' runs to pv junction 20 on the other end of photovoltaic cell 15"'. Between terminal 260' and pv junction 20, lead 28"' includes, respectively and in series, diode 24 and resistor 22. Mating VELCRO^™ strips (not shown) are attached respectively to the underside of photovoltaic cell 15"' and a face of device 400 for attachment of photovoltaic cell 15"' to device 400. In this embodiment, the photovoltaic cell can be mounted to the top of device 400; the batteries can be "C" or "D" size cells (rechargeable) ; the diode can be an IN 401 silicon diode; and, the resistor can be variable ohms, 1/4 W carbon resistor. Selection of a resistor depends upon factors such as the device and the resistance of other elements of the circuit and, selection of a resistor is within the ambit of the skilled artisan. The resistor can be omitted if desired, which is the preferred embodiment.

Considering the embodiments illustrated in Figs. 2, 2A, 3A to 3C, and 4A to 4G, in combination with the "hard-wired" embodiment of Fig. 5, Figs. 5A and 5B show means for "hard-wiring" of earlier-described embodiments of the invention (in addition to directly soldering wires from an apparatus of the invention to dummy battery casing's terminals within a portable or walkabout device) .

Figs. 5A shows flexible metal terminals 300A and 300B at the ends of leads 290A and 290B, respectively. Leads 290A and 29OB can enter into device 400 of Fig. 5 and terminals 300A and 300B can be inserted between respective poles of batteries 26 and terminals 260A and 260B (or terminals 260 and 260' of Fig. 5) . The metal terminals 300A and 300B can be metal foil tape with an adhesive back and, leads 290A and 290B can be flat wire which can adhesively mount. Likewise leads 290A and 290B with terminals 300A and 300B can be used instead of cable 29 and plug 30 of the apparatus of Figs. 2 and 2A, as well as instead of leads 29A and 29B or leads 29A' and 29B' and plug 30' or 30" of the embodiments of Figs. 3C or 4B. Thus, in the embodiments of the invention the leads can run directly into a battery compartment of a portable or walkabout device. The leads 300A and 300B can be flexible metal, acting as spring members to contact terminals within the device, when a battery is not also within the battery compartment of the device; or, can respectively contact terminals by being positioned between a pole of a battery and a terminal of the device.

In the same vein, Fig. 5B shows alligator clips 300A' and 300B' attached at the end of respectively leads 290A' and 290B' . The alligator clips can each attach to a terminal within a battery compartment of a portable or walkabout device and, leads 290A' and 29OB' can be employed instead of cable 29 and plug 30 of the apparatus of Figs. 2 and 2A, or, instead of leads 29A and 29B or leads 29A' and 29B' and plug 30' or 30" of the embodiments of Figs. 3C or 4B.

Since it may be desirable to also power a portable or walkabout device or recharge the battery in the apparatus of the invention by means of a standard A.C. power converter or a power converter which runs off of an automobile battery, shown in Fig. 5C are leads 280 and 280A terminating at female receptacle 50 which is adapted to receive a male plug from a conventional converter. Leads 280 and 280A, respectively, can be connected leads 28A and 28A' or, leads 28A" and 28" (near the battery(ies) ) of the embodiments in Figs. 3C, 4B and 5 so as to enable the apparatus of the invention to be connected to a conventional A.C. converter or automobile battery power converter, to allow energy from such a converter to power the portable or walkabout device or, recharge the battery.

Figure 6 shows apparatus 1 of the invention, generic to all embodiments, wherein the front face of photovoltaic cell 150 (also generic to all embodiments) contains phantom writing or images, which can be any message or characters, such as advertising, painted onto the front face with any suitable paint, such as acrylic paint, preferably in light, thin layer(s) , which do(es) not substantially interfere with light passing through the front face of photovoltaic cell 150. The concept of an image on the face of a photovoltaic cell is contrary to the teaching in the art (that the light should pass through unimpeded) ; yet the phantom writing only reduces output of the cell by about 1% or less. Thus, a custom paint of a white background with superimposed color letters or images can be placed upon the front face of photovoltaic cell 150 to display an advertisement. The writing or image can also be silkscreened or etched onto the front face of photovoltaic cell 150 or, can be a decal applied thereto. Thus, the invention comprehends a method for advertising or conveying a message. Figures 7A - 7K show various portable or walkaround devices with apparatus 1 of the invention attached and connected thereto. In particular, apparatus 1 is connected and attached to: a portable walkaround type radio 7A (to a side thereof) in Fig. 7A, a walkaround type radio/tape player 7B (to a side thereof) in Fig. 7B, a portable compact disc player 7C (to the top of the openable lid thereof) in Fig. 7C, a hand-held video camera 7D (to the top thereof) in Fig. 7D, a pager 7E (to a side thereof) in Fig. 7E, a walkie talkie 7F (to a side thereof) in Fig. 7F, a cellular phone 7G (to the back thereof) in Fig. 7G, a cordless telephone 7H (to the back thereof) in Fig. 7H, a boo box radio 71 (to the top thereof) in Fig. 71, a battery powered hand tool (such as a drill on screwdriver) 7J (to the top thereof) in Fig. 13, and, a laptop or notebook computer 7K (to the top of the openable lid thereof) .

Figures 8A to 8C show apparatus 1 of the invention (with or without portable or walkaround device) worn by a user by means of an armband (Fig. 8A) or by means of a necklace (Fig. 8B) . In Fig. 8C, apparatus 1 of the invention (with or without portable or walkaround device) is worn about the waist (front or back side) . Such means for wearing a device on the arm or waist (armband, belt-waist) are known in the art. However, heretofore it was not taught or suggested to wear an external photovoltaic battery charger or power pack (armband, necklace, belt-waist) . Fig. 9 shows the A.C. adapter/charger 800, with two jacks 155 (3 V., 50 mA) for adapter use and 156 (4.5 V. , 50 mA) for charger use by way of plug 30 shown in Fig. 9B. Fig. 9A is a side view of the adapter/charger 800. in use with an apparatus of the invention. Fig. 9B is a side view of the adapter/charger 800, in use with an apparatus of the invention. Note that plug 30 can be inserted into jack 155 or 156 and, that adapter/charger 800 can attach via VELCRO^™ 33 on the top thereof. Fig. 9C is an extension cord used to bring power during the adapter function to a reasonable user distance i.e. duplex outlet wall socket to 6-12 feet.

Fig. 9D shows a straight through (no voltage change, European pin configuration adaption only) or an encapsulating housing 801, containing a voltage dropping transformer (230-110 V.A.C.) along with pins 802.

Figs. 10 and 10A show an embodiment of the invention wherein device 90 has indentations 94 at opposing sides thereof and apparatus 10 is similar to previous embodiments except that it has two generally "U" or "C" shaped clips 350 connecting receptacle 26 and photovoltaic cell 15 (in a generally perpendicular arrangement) and are electrically conducting. The inner surface of each clip 350 has two opposing ribs 95 which are adapted to fit complementary or clip into indentations 94 and conduct electric power. Clip 350 can flex, as shown in Fig. 10A to allow for attachment and detachment; or, clip 350 can be rigid for a snap fit. Thus, device 90 is adapted to receive the apparatus of the invention.

Fig. 11A is a front view of apparatus 10' which is similar to other embodiments except that hinge 3500 is formed of a thermoplastic, (e.g. acrylic urethane) , such as that available as "Flexfold" from ABC Plastics (as shown in the product data sheet therefor, incorporated herein by reference) which is heated and cooled to be positioned in a predetermined required angle which becomes spring loaded. Fig. 11B is a plan view of apparatus 10 which is similar to earlier embodiments except that clip 91, (shown in Figs. 12A, 12B, 12C and 12D) is employed to connect apparatus 10 (at receptacle 26) to a face of device 40. Clip 92 is comprised of two halves (Fig. 12A) , each having a rectangular body 93C, which at a portion of along edge thereof has self adhesive double faced foam strips 92 and opposite that portion trapezoidal extensions 93B and, trapezoidal cut- out 93A. A mechanical stop 93 allows one inverted clip to lock to a second clip by the mating of extensions 93B and cut-out 93A (Fig. 12C) . Adhesive strips 92 are employed to attach a half clip 91 to device 40 and another to apparatus 10 such that the half clips can snap or clip together to mount apparatus 10 to device 40 (Fig. 11B).. Clip 91, can be offset to change the location of apparatus 10 to accommodate different thicknesses of devices which can comprise device 40. Clip 91 in Fig. 12A-12D can be "universal", that is, it can be "cut to length" and positioned by the user.

Change in various different depths or thicknesses of device 40 is accommodated by the positioning of clip 91 (Fig. 12A-12D) and the adhesive 92 as desired. Apparatus 1000 in Figs. 13 and 14 is an embodiment of the invention wherein photovoltaic cell 15 is mounted to the front exterior side of a pouch, bag or case, such as a canvas pouch, with battery receptacle 26 forming an interior portion of the pouch. Jacks or other connecting means (not shown) electrically connect device 87 to apparatus 1000, as in other illustrated embodiments. Likewise, photovoltaic cell 15 is connected electrically to the battery receptacle 26 as in other illustrated embodiments. Apparatus 1000 is openable by pulls 84 riding in the teeth of zipper 85. The back exterior side of apparatus 1000 can have belt loop 88 for a user to wear apparatus 1000; for instance by means of belt 89.

Figs. 15 and 15A show apparatus 1000' of the invention which is like the other embodiments except it is an indoor/outdoor portable power supply and battery charger and, is a polyhedron with generally square or rectangular backside 80, generally square or rectangular photovoltaic cell 15, two triangular opposite sides 1001 and square bottom 1002. Apparatus 1000' can power a radio or trickle charge batteries from man-made or waste light as well as from direct and diffuse natural light. Apparatus can attach to a wall with VELCRO^™ 33 (on backside 80) or any other type of hanging device. Apparatus 1000' can be positioned near a floor lamp or near a ceiling light or near a window, or placed on the floor or a table top with backside 80 resting thereon.

In the present invention, it is preferred that the batteries are tabbed and/or soldered and/or encapsulated in a user non-serviceable, factory sealed, water resistant case and, that the photovoltaic cell, diodes, leads, etc. are hermetically sealed.

The apparatus of the invention can be employed to power various devices and, can contain a battery for accommodating temporary blockage of light, e.g., temporary cloud cover, or, a battery and photovoltaic cell to power a device and charge the battery for long- term use without light.

Typical specifications for embodiments and pieces thereof can be as follows: 10

15

10

15

10

Having thus described in detail preferred embodiments of the present invention, it should be understood that the present invention and following claims are not to be construed as limited to the preferred embodiments as many obvious variations of which are possible and within the scope of the present invention.

Claims

WHAT IS CLAIMED IS:

1. An apparatus for powering a walkaround or portable device comprising: a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery; means for connecting the battery to the walkaround or portable device extending from the poles of the battery so that the apparatus supplies power to the device and/or recharges the battery; and, means for mounting the apparatus to the device.

2. A method for powering a walkaround or portable device comprising: connecting an apparatus for powering a walkaround or portable device to the device so that the apparatus supplies power to the device and, mounting the apparatus to the device; wherein the apparatus comprises a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery, means for connecting the battery to the walkaround or portable device so that the apparatus supplies power to the device and/or recharges the battery and, means for mounting the apparatus to the device.

3. A kit for powering a walkaround or portable device comprising: an apparatus for powering the device comprising a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery having means for connecting the battery to the device so as to power the device and/or recharge the battery; and, means for mounting the apparatus to the device.

4. A combination of a walkaround or portable device and a photovoltaic power source which is connectable or connected and mountable or mounted to the device wherein the power source is an apparatus which comprises a photovoltaic cell connected in series to a diode connected in series to a rechargeable battery, means for connecting the battery to the walkaround or portable device so that the apparatus supplies power to the device and/or recharges the battery and, means for mounting the apparatus to the device.

5. The apparatus of claim 1 wherein the mounting means comprises mating VELCRO^™ strips on each of the apparatus and device.

6. The apparatus of claim 1 wherein the mounting means comprises one of a male or female member on a face of the device which mates with one of a female or male member on the apparatus.

7. The apparatus of claim 1 wherein the apparatus is in the form of a pouch with the photovoltaic cell attached to an exterior face thereof; the diode, battery and connecting means within the pouch; and, the mounting means comprises the pouch being dimensioned to receive and contain the device.

8. The apparatus of claim l wherein the mounting means comprises a pair of locking clips each of which adhesively mount to each of the device and apparatus.

9. The apparatus of claim 1 wherein the photovoltaic cell and rechargeable battery are perpendicularly positioned with respect to each other and the mounting means includes a hinge means whereby each of the photovoltaic cell and battery are positioned over substantially perpendicular faces of the device.

10. The method of claim 2 wherein the mounting means comprises mating VELCRO^™ strips on each of the apparatus and device.

11. The method of claim 2 wherein the mounting means comprises one of a male or female member on a face of the device which mates with one of a female or male member on the apparatus.

12. The method of claim 2 wherein the apparatus is in the form of a pouch with the photovoltaic cell attached to an exterior face thereof; the diode, battery and connecting means within the pouch; and, the mounting means comprises the pouch being dimensioned to receive and contain the device.

13. The method of claim 2 wherein the mounting means comprises a pair of locking clips each of which adhesively mount to each of the device and apparatus.

14. The method of claim 2 wherein the photovoltaic cell and rechargeable battery are perpendicularly positioned with respect to each other and the mounting means includes a hinge means whereby each of the photovoltaic cell and battery are positioned over substantially perpendicular faces of the device.

15. The kit of claim 3 wherein the mounting means comprises mating VELCRO^™ strips on each of the apparatus and device.

16. The kit of claim 3 wherein the mounting means comprises one of a male or female member on a face of the device which mates with one of a female or male member on the apparatus.

17. The kit of claim 3 wherein the apparatus is in the form of a pouch with the photovoltaic cell attached to an exterior face thereof; the diode, battery and connecting means within the pouch; and, the mounting means comprises the pouch being dimensioned to receive and contain the device.

18. The kit of claim 3 wherein the mounting means comprises a pair of locking clips each of which adhesively mount to each of the device and apparatus.

19. The kit of claim 3 wherein the photovoltaic cell and rechargeable battery are perpendicularly positioned with respect to each other and the mounting means includes a hinge means whereby each of the photovoltaic cell and battery are positioned over substantially perpendicular faces of the device.

20. The combination of claim 4 wherein the mounting means comprises mating VELCRO^™ strips on each of the apparatus and device.

21. The combination of claim 4 wherein the mounting means comprises one of a male or female member on a face of the device which mates with one of a female or male member on the apparatus.

22. The combination of claim 4 wherein the apparatus is in the form of a pouch with the photovoltaic cell attached to an exterior face thereof; the diode, battery and connecting means within the pouch; and, the mounting means comprises the pouch being dimensioned to receive and contain the device.

23. The combination of claim 4 wherein the mounting means comprises a pair of locking clips each of which adhesively mount to each of the device and apparatus.

24. The combination of claim 4 wherein the photovoltaic cell and rechargeable battery are perpendicularly positioned with respect to each other and the mpunting means includes a hinge means whereby each of the photovoltaic cell and battery are positioned over substantially perpendicular faces of the device.

25. The apparatus of claim 1 wherein there is writing or an image on the photovoltaic cell outer surface.

26. A method for conveying a message or for advertising comprising placing writing or an image on the photovoltaic cell outer surface of the apparatus of claim 1.