ARB-L21-5000 is a high-capacity 21700 Li-ion rechargeable battery built for more power and longer runtimes. Additional features include a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating. Pressure relief vents which expel waste gas in the rare case of an internal short circuit preventing an explosion. Battery capacity up to 5000mAh. 500 charging cycles. Currently compatible with the HT18,  LR35R,  PD36R,  PD40R V2.0,  TK22 V2.0,  TK22 UE, and  TK30.
Features:
Capacity: Â 5000mAh
Voltage: Â 3.6V
Charging Current: Â Recommended 1A, maximum 5A
Weight: Â 2.6 ounces (72.5g)
Size:  Length: 2.99 ‚ ³ (76mm) Diameter: 0.85 ‚ ³ (21.5mm)
Warranty Period: Â 12 month from date of purchase