18650 vs 21700 vs 26650: Which Flashlight Battery Do You Actually Need?
What the numbers on a lithium cell actually mean, how 18650, 21700 and 26650 differ in runtime and size, and how to work out which one your light takes.
Christopher Smith |
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What the numbers on a lithium cell actually mean, how 18650, 21700 and 26650 differ in runtime and size, and how to work out which one your light takes.
Christopher Smith |