Fenix ARB-L21 21700 5000mAh Battery

Code: 6942870306933

Fenix ARB-L21 21700 5000mAh Li-ion battery.

The Fenix ARB-L21-5000 battery is a high capacity 21700, Li-ion cell that has been designed for high drain devices such as high intensity flashlights and headlamps. The high capacity (5000mAh) provides excellent reliability and optimum runtimes.

The battery features a built-in protection circuit for damage resistance, triple overheat protection and built-in overcharge and over discharge protection, for safety and reliability.

The 21700 is recommended to use with the following Nitecore chargers: UI1, UI2, UM2, UM4, UMS2 and UMS4.


Please note: Due to customs restrictions we are unable to send Li-ion batteries outside of the UK. Any orders for these batteries with EU or Worldwide delivery will be cancelled and refunded.

Due to shipping restrictions we are unable to send orders containing only batteries without a device to Northern Ireland and the Channel Islands. Orders that include a device such as a torch and/or charger are unaffected.

  • Capacity: 5000mAh
  • Maximum Output Current: 7.5A
  • Recommended Charging Current: 1A (max. 5A)
  • Protection circuit built into positive terminal for outstanding damage resistance
  • Triple overheat protection for safety and reliability
  • Built-in overcharge and over discharge protection
  • Unique structural design for better impact resistance
  • Button top positive contact for greater versatility
  • Diameter: 21.5 mm
  • Length: 76 mm
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