bATTERY

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nubee

Ultra Member
ECF Veteran
Jun 24, 2009
1,496
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IL, USA
You can read loads on this but I'll fling a short answer here....

Protected Li Ion batts have a very small circuit board (usually on negative terminal) that prevents over discharge and shorts - both of which are bad for Li Ion batts.

Unprotected do not have this circuit board.

Protected batts are also slightly taller (and a wee bit wider) than unprotected batts.
 
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