Lenovo 5B11M90075 is an internal rechargeable lithium-ion battery pack for supplying power to a compatible laptop as a replacement component. It is identified in manufacturer documentation as battery model L20D3P72.
The pack has a rated voltage of 15.36 V and an energy capacity of 41 Wh. Its listed weight is 220 g. These details identify this particular configuration; check that Lenovo FRU 5B11M90075 is specified for your device before choosing it.
This battery is intended to restore internal battery power in a device that calls for this FRU. No compatible laptop model list or package contents are specified.