COSLIGHT515974 NCM 3.72Ah T

HP L11421-AC2 is an internal battery for a notebook, supplying power when the mains adapter is disconnected so you can use the computer away from an outlet.

It uses lithium-polymer technology and has a stated capacity of 3440 mAh and stored energy of 41.04 Wh. Its output voltage is 11.34 V, and the assembly contains 3 cells.

Designed as a component fitted inside a compatible laptop, this battery is distinct from an external battery pack. Its black finish and part number identify this specific HP battery; compatibility depends on the laptop.

For work, study or other laptop use away from mains power, it serves as the computer’s portable power source. The listed capacity and electrical ratings describe the battery for checking against the replacement part required by your device.