The Fenix 18650 rechargeable battery with a capacity of 2600 mAh with its own micro-USB charging connector. Thanks to this, you can easily charge the battery with a conventional charger or from a computer.
The advantage of the Li-Ion battery is its high capacity, and it almost does not suffer from self-discharge or memory effect.
This battery is equipped with protection against over-discharge, short circuit, overheating and high current draw. If the electronic protection of the battery reaches the limit values, the cell will be safely disconnected. When charging, plug the USB cable into the side connector, the indicator light is red during charging, blue when fully charged. Lifetime is more than 500 charge cycles.
Caution, the size may not fit some old flashlight models - for example, Fenix PD31, TK11, TK21, TK30, and also not compatible with Fenix FD65 and Fenix TK47.