Lenovo Battery Internal 4 Cell 52.5Wh LiIon CXP

Lenovo 5B11M90028 is an internal lithium-ion battery for laptops, serving as a replacement power source for systems that use this part. Its identifiers are model L21C4P71 and assembly number SB11M89829, which help distinguish the specified component.

The four-cell configuration provides a rated energy capacity of 52.5 Wh, with a specified voltage of 15.44 V. These electrical details describe the battery without establishing compatibility with any particular laptop model; check that the system uses this exact part before choosing it.