This Laptop Battery can replace the following part number:
LENOVO:
0A36281 0A36282 0A36283
42T4863 42Y4864 42T4867
42Y4868 42T4873 42Y4874
42T4901 42T4902 42Y4940
etc
This Laptop Battery is also compatible with the following models:
Laptop Computer
LENOVO:
LENOVO ThinkPad X220 Series LENOVO ThinkPad X220i Series LENOVO ThinkPad X220s Series