The Fenix ARB-L21-5000U 21700 USB Type-C battery is twice as powerful as the standard 18650/2300mAh battery.

The ARB-L21-5000U has a built-in Type-C fast charging port for charging the battery without a charger. The ARB-L21-5000U is also compatible with external chargers (recommended chargers: Fenix ARE-D1, Fenix ARE-D2, Fenix ARE-A2, Fenix ARE-A4 smart charger).

Battery safety and performance are ensured by multiple protection circuits and steel shell riveting technology and pressure relief vents.

Technical features

  • Size: Ø21.5 x 76 mm
  • Weight: 72.5 g
  • Type: Li-ion
  • Dimensions: 21700
  • Nominal voltage: 3.6 V
  • High capacity: 5000 mAh
  • Integrated USB Type-C charging port
  • LED indicators for charge status (red = charging, blue = ready)
  • Unique structural design for improved shock resistance
  • Built-in protection against overcharging, over-discharging, short circuits and three sets of overheating protection to ensure battery safety and performance
  • Designed to retain up to 75% of its original capacity after 500 full charge and discharge cycles.
  • Charge current Charge via its own USB port: 2A, charge via charger: 1A (recommended), 5A maximum.
  • Discharge 8A (max)
  • Warranty 12 months