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How to Run a Battery Electric Clock on Dead Batteries
Infinit E Battery
Make your own switched 9 volt battery connector
How to make a 9 volt battery
Cordless drill - Improving the battery
An Improved Joule Thief--An Unruly Beast Tamed?
Put Your Batteries On the Outside
Battery Tester and Charger
How to Run a Battery Electric Clock on Solar Power--Part II
Posted:Sep 3, 2009
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