Nitecore 21700 NL2140i Li-ion Battery (4000mAh)

Nitecore 21700 NL2140i Li-ion Battery (4000mAh)
additional image for 21700 NL2140i Li-ion Battery (4000mAh)
additional image for 21700 NL2140i Li-ion Battery (4000mAh)

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NL2140i : £22.95
In Stock
  • Description
  • Specification


The Nitecore NL2140i 21700 battery is specifically designed for the Nitecore i Series, including the P20i and P10i flashlights. The cell has a capacity of 4000mAh and a maximum continuous discharge of 8A.

The i Series battery enables a highly efficient output by minimising the loss of power due to internal resistance. It features a dual way output with positive and negative polarities at both ends, plus a high energy density of up to 240mWh/g.

The 21700 battery has a high performance protective circuit in addition to a range of safety features, including: 

  • Nickel plated steel straps at both ends of the battery to ensure high impact resistance, good electrical conductivity and oxidation resistance
  • Coated with a durable metallic film to guard against abrasion
  • Tough plastic circuit board protector

The Nitecore 21700 battery can be charged in the following Nitecore chargers: UMS2, UMS4, UI1 and UI2.

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.


  • Capacity: 4000mAh
  • Voltage: 3.6V
  • Continuous Discharge Current: 8A (max)
  • Weight: 75.5 g / 2.66 oz.
  • Length: 76.7±0.3 mm / 3.02"±0.01"
  • Diameter: 21.9±0.3 mm / 0.86"±0.01"

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