40T 21700 Battery

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40T 21700 4000mAh 30A Batteries are a new flat-topped 21700 sized rechargeable cell, ideal for powering high amp box mod and other high-drain devices.

NOTE: These are 21700 sized batteries and will not be compatible with most mods. Most mods will take 18650 sized batteries. Please check to ensure proper sizing for battery compatibility.