DIY Solar Powered USB Charger
July 13, 2012 - Today we built a simple do-it-yourself solar USB charger that fits in an Altoid tin. This little guy will charge most mobile devices that charge via USB using 2 rechargeable AA batteries and flexible thin-film solar panels. All the parts we used totaled less than $30 and can be as low as $10 if purchased in bulk, which includes: read more>>>
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