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, over charge/discharge and over heating. This battery can quickly be charged without the need for a separate charger. This not only save you money from purchasing a charger, but also convenience of not having to carry around another device. This will work in all of the models that utilize the standard Li-ion 18650, including best sellers like the PD35, PD35Tac, TK20R, TK75, TK15UE, etc.

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)

1 Battery