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CR-2 and 16340 batteries?






No, CR2 and 16340's are a different size.
CR123 and 16340 are the same size; but not the same thing.

ecigarette_batteries.jpg


The image may help :)
 
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A laser that takes two 16340s will work on two rcr123, but at less than full power. a laser that takes two rcr123s will be damaged by using two 16340s. they are similar, but 16340s provide .7 more volts each
 
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