Fenix ARB-L21-6000 Rechargeable Battery
A rechargeable 21700 Li-ion battery with 6000 mAh capacity and 3.6 V output. It is made as a spare or replacement battery for compatible Fenix lights.
Battery and compatibility
The battery is designed for lights that support the 21700 format. Charging is handled by a compatible charger. Compatible products include selected Fenix 21700 lights including PD40R V3.0, PD45R ACE, LD36R, CL27R and WF25RM.
Safety and handling
Built-in protection circuitry helps reduce the risk of short circuit, overcharge, over-discharge and overheating. The protected construction is made for normal use in compatible Fenix products. It is not compatible with 18650 lights, older chargers or pre-2025 E35R models.
Highlights
- Product type: rechargeable 21700 Li-ion battery
- Capacity: 6000 mAh
- Voltage: 3.6 V
- Charging current: 1.2 A recommended, 4.2 A maximum
- Max output current: 10 A
- Charging: a compatible charger
- Compatibility: selected Fenix 21700 lights including PD40R V3.0, PD45R ACE, LD36R, CL27R and WF25RM
- Weight: 80 g
- Size: 76.6 x 22 mm
- Warranty: 12 months from date of purchase
Fenix Lighting covers this battery with a 12-month warranty from date of purchase.






