Lenovo Battery Internal 4 Cell 46Wh LiIon CP/C

Lenovo 5B10W51849 is an internal lithium-ion battery for select Lenovo laptops, used to power a compatible computer when it is disconnected from external power. The exact part number helps identify this battery assembly.

It has four cells, a stated energy capacity of 46Wh, and a listed voltage of 15.36V. These specifications describe the battery but do not determine runtime, which depends on the laptop and how it is used.

The listed battery model is L21C4PG1, with ASM reference SB10W51950. The listing also says 5B10W51849 is replaced by Lenovo part 5B11H56423. These identifiers help distinguish the assembly when checking a replacement for a supported laptop.