The Lenovo 5B11K38529 is a replacement battery for select Lenovo laptops. Its model designation, L22B4PA0, identifies this specific variant for checking compatibility with a supported system.
The distributor lists a four-cell Li-ion design with a nominal rating of 15.44 V and 60 Wh. Lenovo’s safety data sheet gives 15.44 V and 58.6 Wh for the same part number and model; 60 Wh is the rounded capacity figure in the distributor listing. It is intended for use in compatible Lenovo laptops.