Power various electronics, including flashlights, camping lanterns, and much more, with this 18650 Lithium-Ion Battery with Micro-USB Charging Port from Fenix Flashlight. In addition to the conventional method of insertion into a charger, you can replenish the energy level in this cell by connecting a power cable with a Micro-USB plug. The battery features 3.6V of output power, a 3500mAh capacity, and a 12.6Wh rating.
A circuit with a durable steel shell is built into the anode to protect against overcharging, over-discharging, short-circuiting, and overheating. The last of these is prevented by a three-layer design consisting of a pressure relief valve, a microporous membrane separator, and a PTC cathode block. Additionally, the durable battery is designed to last for up to 500 charge/discharge cycles, and its low self-discharge rate allows it to maintain up to 75% of its capacity after the final cycle. As an added bonus, an LED status indicator light glows in red during charging and turns green when the process is complete.