18650 Battery Overview
The 18650 battery is a large cell lithium-ion rechargeable battery made for high-drain devices. The 18650 comes in button-topped, flat topped, protected, unprotected, built-in USB ports for charging, and without USB charging ports. The 18650 is large enough generate between 2000-3500mah to keep your device running longer along with 300 - 500 charging cycles to provide a long lasting supply of power.