Lenovo Battery
42T4959
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X130e - 23388A11
ThinkPad X130e - 2338CTO
ThinkPad X121e - 304563M
ThinkPad X121e - 3045CTO
ThinkPad X121e - 30482LM
ThinkPad X121e - 30482MM
ThinkPad X121e - 3048CTO