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21700 VS 18650: BEHIND THE LITHIUM-ION BATTERY CELL BATTLES by Rob Simonoski  21700 vs 18650 Choice Fuels E-Bike Advancement Around here, we primarily focus on the  gear surrounding the e bike industry. That makes the 21700 vs 18650 lithium-ion battery cell conversations incredibly relevant to us. After all, these lithium-ion power sources reach far beyond the e bikes. They’re driving innovation in Teslas, hoverboards, the vaping community, and so much more. 21700 VS 18650: WHAT DO THE NUMBERS MEAN? 21700, 18650, 20700 and others simply refer to the physical size of the lithium-ion cell. For 18650, it’s an 18 mm...

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