How to replace CMOS battery on my ThinkPad X1 2nd gen?

"Hi @tcoulon

Here's the hardware maintenance manual for the laptop.

Go to p.66-68 to view the necessary pre-requisite steps and then the procedure to remove the coin cell battery from the laptop.

Here's a link to the parts for the laptop. Click on Select Commodity > CMOS battery (1) to find the part number - 04X0443

Search online using the part number only, to get results for suppliers of the part that suit you best."