Fenix 3500mAh 18650 Li-ion Battery

ARB-L18-3500U is a high capacity 18650 Li-ion rechargeable battery with a built-in micro-USB charging port.  It also includes a protection circuit in the anode to help prevent short circuits, overcharge/discharge and overheating. This battery can quickly be charged without the need for a separate charger.  This not only saves you money from purchasing a charger, but also the convenience of not having to carry around another device.  This will work in all of the current models that utilize a Li-ion 18650 battery, including best sellers like the PD35 V2.0, PD35TAC, TK20R, TK75, TK15UE, and more.This is for a single battery. Micro-USB charging port 3500mAh high capacity Protection circuitry to prevent short circuits Pressure vents to prevent explosions 500 charge cycles Voltage: 3.6V Charging Current: Recommended 1A, maximum 2A Charging Current USB Port: 0.8A Weight: 1.8 ounces (50.2g) Size: Length: 2.8″ (70mm) Diameter: 0.7″ (18.6mm) Warranty Period: 12 months from the date of purchase