The Lenovo 5B11M90128 is an internal replacement battery for select Lenovo laptops that use this part. Its model is L24D4P72, a reference for identifying the specific battery.
The lithium-ion battery has four cells and a stated energy capacity of 54.7 Wh. These specifications describe the battery for checking whether it matches the part required by a compatible laptop.
It is intended for installation inside the laptop as a replacement for part 5B11M90128.