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playing card solar charger, Tag
- DIY: How To Turn a Playing Card Into a Solar-Powered Battery Charger Sat, 18 Aug 12, 7:43amA few weeks ago we shared Instructable‘s handy DIY guide to building your own solar-powered USB charger. Now, the website has provided a guide to creating a solar-powered charger for rechargeable NiMH AA and AAA batteries...