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Fenix ARB-L21-4000P 21700 Rechargeable Battery. The Fenix ARB-L21-4000P is a high-capacity 21700 Li-ion rechargeable battery built for longer runtimes at higher levels. These battery allows a high output flashlight like the LR35R to have its turbo setting of 10000 lumens to maintain it's output by maintaining higher voltage for longer periods of a batteries charge. 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 4000mAh. 500 charging cycles. Important Note: THIS BATTERY IS NOT COMPATIBLE WITH 18650 FLASHLIGHTS OR OLDER STYLE CHARGERS. COMPATIBLE CHARGERS ARE THE ARE-A2, ARE-A4, ARE-D1 OR ARE-D2.

Fenix ARB-L21-4000P Rechargeable Battery Features:

• 21700 battery type
• 4000mAh high capacity
• Protection circuitry to prevent short circuits
• Pressure vents to prevent explosions
• 500 charge cycles
• Currently compatible with the HT18, LR35R, PD36R, PD40R V2.0, TK• 22 V2.0, TK22 UE, and TK30

Fenix ARB-L21-4000P Rechargeable Battery Specs:

• Capacity: 4000mAh
• Voltage: 3.6V
• Charging Current: Recommended 1A, maximum 4A
• Maximum output current: 18A (less than 3 minutes)
• Maximum continuous output current: 10A
• Weight: 2.5 ounces (70g)
• Size: Length: 2.99? (76mm) Diameter: 0.85? (21.5mm)
• Warranty Period: 12 month from date of purchase

Chargers

Fenix ARE-A4 Four Bay Battery Charger

Fenix ARE-D2 Two Bay Battery Charger

Fenix ARE-A2 Two Bay Battery Charger

Fenix ARE-D1 Single Bay Battery Charger