| |  This is a really simple solar battery charger using the PowerFilm 7.2V 200ma flexible solar panel. Panel is about 6" X 10".
We've soldered a 4 AA holder to the solar panel and included a blocking diode to prevent any power "leakage" through the panel when it is not in the sun.
If completely discharged, 4 - 1700mA batteries would require about 8.5 hours of sun to fully charge.
Use this charger for your own project or a homemade backpacking charger. Wires could be cut and lengthened as needed for your application. You should not use rechargeable alkaline batteries in this charger.
Charger is not weatherproof, so you must be careful to protect it from rain, etc.
Charger does not have overcharge protection, so you should make sure to not keep batteries charging for a very long time.
Have fun!
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