21700 Battery 5000mAh Button Top PROTECTED Li-ion Rechargeable - Orbtronic
Xtar 18650, 20700, 21700 batteries | E-Cigarette Forum
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Is this genuine? This Samsung 21700 40t was bought on eBay. Not sure if it's real and it's marked with 'Not for vape' on it. If it's genuine, is it safe to
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True North Vapor | Vaping Battery Comparison: 18650 vs. 26650 vs. 20700 vs. 21700