Fenix ARB-L21-5000 Rechargeable Battery

(87 customer reviews)


ARB-L21-5000 is a high-capacity 21700 Li-ion rechargeable battery built for more power and longer runtimes. 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 5000mAh. 500 charging cycles.Currently compatible with the HT18, LR35R, PD36R, PD40R V2.0, TK22 V2.0, TK22 UE, and TK30. The TK22 V2.0 and TK22UE require a charger to charge the battery. Important Note: THIS BATTERY IS NOT COMPATIBLE WITH 18650 FLASHLIGHTS OR OLDER STYLE CHARGERS. COMPATIBLE CHARGERS ARE THE ARE-A2ARE-A4ARE-D1 OR ARE-D2.

SKU: ARB-L21-5000
EAN: 6942870306933
For commercial orders and large purchases, contact us at (888) 775-9996 x6, or
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Specifications of the ARB-L21-5000 Rechargeable Battery

  • New 21700 battery type
  • 5000mAh 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, TK22 V2.0, TK22 UE, and TK30.

Capacity: 5000mAh
Voltage: 3.6V
Charging Current: Recommended 1A, maximum 5A
Weight: 2.6 ounces (72.5g)
Size: Length: 2.99″ (76mm) Diameter: 0.85″ (21.5mm)
Warranty Period: 12 month from date of purchase

87 reviews for Fenix ARB-L21-5000 Rechargeable Battery

Based on 87 reviews
Showing 5 of 87 reviews (4 star). See all 87 reviews
  1. Robert Yee (verified owner)

    Great battery

    (0) (0)
  2. Phillip J. (verified owner)

    Long life

    (0) (0)
  3. Mario Estrada (verified owner)

    Powerful battery with exceptional holding power. Lasts long and easy to carry extras

    (0) (0)
  4. Christopher West (verified owner)

    Another Fenix winner. This is a professional tool in a compact form. Tons of light and other features. I am a committee member for our local FIREWISE prevention efforts. This flashlight will be given away as a door prize at our upcoming event. The pitch is to have the PD40R V2, charger, and spare battery in your Bug Out kit.

    (0) (0)
  5. David C. Miner (verified owner)

    Great, needed a backup battery to my flashlight which is the best and brightest little light!

    (0) (0)
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