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People don't really grok the energy stored in a AA because it seems so innocuous. A rechargeable AA has about 40 joules of PE. That's as much as a handgun bulle
by noonespecial 15y ago
People don't really grok the energy stored in a AA because it seems so innocuous. A rechargeable AA has about 40 joules of PE. That's as much as a handgun bullet. To make that much energy by winding your battery would take all day. Adding a little spring probably makes it worse, not better than just gearing the little generator to be cranked directly.