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Fenix Rechargeable battery Fenix ARB-L21-5000U 21700 USB

Availability
More items expected to arrive 24.12.2025.

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Overall rating

☆☆☆☆☆ (3 reviews)

Product description

ARB-L21-5000U 21700 USB type C rechargeable Li-ion battery, sufficient power, steady performance, the capacity of the 21700 battery is twice as powerful as the common 18650/2300mAh battery. ARB-L21-5000U has integrated fast type C charging port to recharge battery without external charger. ARB-L21-5000U is also compatible with external chargers (recommended chargers: Fenix ARB-D1 or Fenix ARB-D2 smart charger). Battery safety and good performance is secured by multiple protection circuits and steel shell riveting technology and pressure relief vents.

Product details

5000 mAh large capacity
USB type C integrated charging port
LED lights for charging status (red = charging, blue = ready)
Unique structural design for better impact-resistant
Built-in over charge, over discharge, short circuit and three sets of over-heat protection ensure the safety and good performance of the battery
Designed to retain up to 75% of its original capacity at 500 full charge and discharge cycles

Technical details

Category	Rechargeable battery
Type	Li-ion
Dimensions	21700
Nominal voltage	3,6 V
Capacity	5000 mAh
Charging current	Charge by its own USB port: 2A, charge by the charger: 1A (recommended), 5A maximum.
Discharge	8A (max)
Size	Ø21,5 x 76 mm
Weight	72,5 g
Warranty	12 months
Includes	1 pcs (USB type C charging cable not included)
Note	This product will only work in those models supporting 21700 batteries. Currently recommended for the HT18, PD36R, TK22 V2.0, and TK22 UE STRIKER. A USB-C charging cord is NOT included.

When the light reaches a temperature of 65° or above, the light will automatically step down lower output to reduce temperature.
Lighting performance as defined by the ANSI/PLATO FL 1 protocol.

The approximate size of the packed product or the sales package is 200 x 150 x 30 mm.

This product can be delivered only by the methods below:
- Pickup in store
- Delivery to doorstep as agreed (Matkahuolto Kotijakelu)
- Delivery to doorstep (DB Schenker)
- Delivery to doorstep (Matkahuolto Jakopaketti)
- Pickup from parcel point (Matkahuolto)
- Pickup from R-kioski or K-Market Parcel Point (DB Schenker)