Wowtac Rechargeable 18650 Battery 3400mAh with Built-In Micro USB Port;

The Wowtac rechargeable 18650 battery is an advanced piece of technology. No more worrying about purchasing a separate battery charger.
You can now plug a standard micro USB cord directly into the USB port located right on the battery! This makes it extremely convenient for any flashlight that is not directly rechargeable.

Features:

* Wowtac 18650 3.6V Protected Li-ion rechargeable batteries.
* Protected: Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
* Capacity: 3400mAh
* Voltage: 3.6V
* Chemistry: Li-ion
* Recharge: up to 500 cycles