Lenovo Battery Internal 4 Cell 52.5Wh LiIon SMP

Lenovo 5B11M90027 is an internal lithium-ion battery that serves as a laptop’s power source. Model L21M4P72 identifies this specific variant.

Its four-cell construction has a rated energy capacity of 52.5 Wh and a specified voltage of 15.48 V. Lenovo also lists assembly number SB11M89828, another identifier for this battery.

These details help distinguish the exact part: an internal Lenovo battery, model L21M4P72, with four cells and the stated capacity and voltage.