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RE: Just received Solar Powered USB Phone Chargers to send to Steemit User in Africa! @ortigas100 who can now tell us just how much of an impact these small $9 devices can have to help keep him online and on steemit!
Gravity based>?? Like u talkin tesla tch ET alien free energy stuf or u mean like a Grandfather clock with a weight and as it is lowered it turns a gear which generates power? like that? and in daytime solar power cranks it back up to its starting position???
Grandfather clock yes! It has aleady been done with lights : ) Maybe on kickstarter?