Here is a super easy and super cheap way to build a solar battery charger. You will need nothing more than 2 solar panels, a battery holder and a blocking diode.
The project is dirt cheap, usually running you no more than 3 or 4 bucks and is a great way to experiment with solar power. The unit will trickle charge your NiMH rechargeable batteries and can usually charge 2 AA’s fully with about one full day’s worth of sunlight. With some tweaking you could add a USB port to the design so you can keep your iPhone or other gadget that uses a USB connection fully charged all the time.
Check out Instructables for a parts list and a complete project breakdown.
DIY: Solar Battery Charger originally appeared on tech.nocr.at on 2011/02/13.
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