Nitecore 21700 Li-ion Battery 4000mAh NL2140

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Nitecore NL2140 21700 Li-ion battery with 4000mAh capacity.

The Nitecore NL2140 21700 Li-ion battery features a long lifespan, high energy density and powerful performance. The cell has a 4000mAh capacity, 3.6V and 14.4Wh.

As with all Nitecore batteries safety is paramount and the NL2140 cell has a range of internal features to keep you, your devices and chargers as safe as possible. The 21700 battery has an innovative anode design with high temperature resistance, built-in PTC to inhibit high current surges, pressure relief valve which activates in the event of a rapid temperature increase and a microporous barries that protects the delicate internal components. Externally, the cell is equipped with nickel-plated stainless steel protectors at both ends and is coated with a durable metallic film to guard against abrasion.

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.

We are unable to accept returned batteries once they have been opened, so please ensure they are the correct cell for your device before ordering.

  • Capacity: 4000mAh
  • Voltage: 3.6V
  • Continuous Discharge Current: 5A max
  • Weight: Approx. 73 g / 2.57 oz
  • Length: 75.8±0.3 mm / 2.98±0.01"
  • Diameter: 21.8±0.3 mm / 0.86±0.01"
  • Never expose the battery to water or fire
  • When charging or using batteries, ensure the positive and negative ends correspond with the positive (+) and negative (-) symbols
  • To extend battery life it is recommended that it is charged every three months when unused for long periods
  • Keep out of reach of children
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