Weltool UB21-50 21700 USB Rechargeable Li-ion Battery
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Weltool UB21-50 21700 USB Rechargeable Li-ion Battery

$26.50
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Weltool UB21-50 21700 USB Rechargeable Li-ion Battery  ***Batteries purchased without any equipment they can operate must be shipped with UPS ground shipping. If you purchase only batteries and no flashlights/headlamps you must select UPS Ground unless your order is above the free shipping threshold even if other options are available. The battery label may differ from listing in the picture and there may be scuff marks on positive/negative end from being inside of flashlight during shipment to us.***  The traditional Li-ion battery with a protective plate is the nickel plate connection method for the negative protection circuit, while the Weltool UB21-50 uses the built-in protection circuit in the battery positive technology, the steel shell is riveted and integrated with the battery core, effectively avoiding short circuit caused by collision or wear and so on. and will not increase the battery diameter and it does not increase the battery diameter.    The Type-C USB charging interf

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