Fenix ARB-L21-5500 21700 battery standing upright: 5500mAh, 3.6V, 19.8Wh
Fenix ARB-L21-5500 high-performance rechargeable 21700 battery: 5500mAh, 500 charge cycles, protection circuits in the anode, multiple protection
Fenix ARB-L21-5500 batteries on a rock, 5500mAh high capacity
Fenix ARB-L21-5500 multiple protection: anode protection circuits plus three sets of overheat protection
Fenix ARB-L21-5500 retains up to 75% capacity after 500 charge cycles
Fenix ARB-L21-5500 inside a flashlight, 10A maximum output current with low-temperature discharge
Fenix ARB-L21-5500 technical parameters: 5500mAh, 3.6V, charging current, weight, dimensions, warranty, compatible lights and chargers

Fenix ARB-L21-5500 Rechargeable 21700 Battery

Regular price$25.95
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The Fenix ARB-L21-5500 is a high-performance 5500mAh rechargeable 21700 Li-ion battery that packs more capacity into the same compact size, for longer runtimes in your Fenix lights. It delivers up to 10A of output current with stable, low-temperature discharge to help prevent overheating.

Protection circuits in the anode guard against overcharge, over-discharge, short circuit, and overheating, backed by three sets of overheat protection: a pressure relief valve, a separate microporous layer, and a PTC cathodal block. It is rated for 500 charge cycles and keeps up to 75% of its original capacity after 500 full cycles when properly maintained.

Compatible with the TK21R, HT18R V2.0, HT32R, PD40R V3.0, PD36R V2.0, and other Fenix lights that use a 21700 battery. Charge it in the light (if it has built-in charging) or with a Fenix ARE-X1 V2.0, ARE-D2, ARE-D1, ARE-A2, or ARE-A4 charger; this battery does not have its own USB port (see the ARB-L21-5500U for a USB-C version). Price is for one battery.

Shipping note: Lithium-ion batteries are classified as dangerous goods under US transportation rules and usually ship by ground only, so orders containing loose batteries often take longer to arrive than the standard estimate. Delivery times of 14+ days are common.

Specifications

  • Model: ARB-L21-5500
  • Type: 21700 rechargeable Li-ion
  • Capacity: 5500mAh
  • Voltage: 3.6V
  • Maximum output current: 10A
  • Charging current: 1.2A recommended, 4.5A maximum (in a charger)
  • USB charging: none; charge in the light or a compatible charger
  • Cycle life: 500 charge cycles (retains up to 75% capacity)
  • Dimensions: 0.87" x 3.02" (22 x 76.6 mm)
  • Weight: 2.65 oz / 75 g or less
  • Warranty: 12 months from date of purchase

Protection

  • Protection circuits in the anode: overcharge, over-discharge, short circuit, and overheat protection
  • Pressure relief valve protection
  • Separate microporous protection
  • PTC cathodal block protection

Compatibility

  • Lights: TK21R, HT18R V2.0, HT32R, PD40R V3.0, PD36R V2.0, and other Fenix lights that use a 21700 battery.
  • Chargers: Fenix ARE-X1 V2.0, ARE-D2, ARE-D1, ARE-A2, and ARE-A4.

Specifications are from Fenix's laboratory testing and are intended for use with Fenix products.

  • One (1) Fenix ARB-L21-5500 rechargeable 21700 battery