A 21700 battery is a type of lithium-ion rechargeable battery. The numbers "21700" refer to the battery's dimensions: it is 21mm in diameter and 70mm in length. 21700 batteries are commonly used in high-performance applications such as electric vehicles, power tools, and high-powered flashlights. They offer a higher capacity than 18650 batteries and are known for their high energy density, long lifespan, and relatively low self-discharge rate. They are becoming more popular in recent years, and many electronic devices that used to use 18650 batteries are now transitioning to use 21700 batteries.
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![Epoch 21700 5000mAh 10A - Button Top Battery (50G)](http://www.18650batterystore.com/cdn/shop/products/50G_BT05_{width}x.jpg?v=1667989724)
![Epoch 21700 5000mAh 10A - Button Top Battery (50G)](http://www.18650batterystore.com/cdn/shop/products/50G_BT_{width}x.gif?v=1667989724)
Epoch Batteries
Epoch 21700 5000mAh 10A - Button Top Battery (50G)
Regular price$12.99
Sale price$8.25
In stock![Nitecore NL2150HP 21700 5000mAh 15A - Protected Button Top Battery](http://www.18650batterystore.com/cdn/shop/files/nitecore-21700-li-ion-battery_{width}x.jpg?v=1684409661)
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Nitecore
Nitecore NL2150HP 21700 5000mAh 15A - Protected Button Top Battery
Sale price$24.95
In stock![Epoch Batteries 3.6V 1P1S 5000mAh 5A Battery Pack - PCB and 6" Leads](http://www.18650batterystore.com/cdn/shop/products/epoch-5000-leads04_{width}x.jpg?v=1667998367)
![Epoch Batteries 3.6V 1P1S 5000mAh 5A Battery Pack - PCB and 6" Leads](http://www.18650batterystore.com/cdn/shop/products/epoch-5000-leads_{width}x.gif?v=1667998367)
Samsung
Epoch Batteries 3.6V 1P1S 5000mAh 5A Battery Pack - PCB and 6" Leads
Sale price$12.99
In stock