The Nitecore NL2145 21700 high performance li-ion battery has a capacity of 4500mAh. First introduced by the electric car industry, 21700 li-ion batteries offers a long lifespan, high energy density and powerful performance.

The battery has a range of internal safety features including an innovative anode design with high temperature resistance, built-in PTC to inhibit high current surges, press relief valve which activates in the event of a rapid temperature increase and a microporous barrier protecting the delicate internal components of the cell. Externally, the NL2145 is equipped at both ends with a nickel plated stainless steel protector which ensures high impact resistance, good electrical conductivity and oxidation resistance. The battery is coated with a durable metallic film to guard against abrasion and a tough plastic circuit board protector.

The NL2145 Nitecore 21700 battery is compatible with the following Nitecore chargers: UMS2, UMS4, UI1 and UI2.

Please note: 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.

Please note all orders for individual batteries without a device are sent via Royal Mail 48 Tracked, and not Royal Mail 24 Tracked or Special Delivery. Due to shipping restrictions, we are unable to send individual batteries to the Outer Hebrides, Scottish Highlands and surrounding areas, Channel Islands and Northern Ireland. Please see our delivery page for further details.