K KakeL New member Jan 7, 2009 #1 My question is why hasn't anyone invented batteries where you shake them to re-charge them, that would be really worth your money, and they have already made flashlights like that, why cant they use the same principal to make a battery.
My question is why hasn't anyone invented batteries where you shake them to re-charge them, that would be really worth your money, and they have already made flashlights like that, why cant they use the same principal to make a battery.