In this instructable I'll show you a very useful life hack that is used to protect any 18650 cell. You can make it only with an old cell phone battery and with some wires. The Lithium ion batteries that are used in phones have a build in protection circuit, that automatically turns off if the voltag...By: Imetomi
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from Instructables: exploring - technology - robots http://ift.tt/1E5zonk
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