Clockwork Battery / Battery

Nowadays the limitations of the battery power are bringing a lot of inconvience in daily life. Also the used batteries have already become a very heavy burden to enrionment protection. “Clockwork Battery” is designed to solve these problems. “Clockwork Battery” can be used just as ordinary batteries. But when it runs out of electricity, all you need is to twirl the blade in the tail like you wind the clock which will charge the “Clockwork Battery”. This design avoids the limitations of electric quantity and loss of ordinary batteries.