Lenovo Battery
42T4939
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 - 128622U
ThinkPad X1 - 128623U
ThinkPad X1 - 1286CTO
ThinkPad X1 - 129322M
ThinkPad X1 - 12932KM
ThinkPad X1 - 1293RG8
ThinkPad X1 - 1293RM9
ThinkPad X1 - 1293RQ1
ThinkPad X1 - 129422M