1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter the UEFI BIOS
menu.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable Built-in Battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.
Replace a CRU
Follow the replacement procedure to replace a CRU.
Base cover assembly
Prerequisite
Before you start, read
Generic Safety and Compliance Notices
Notes: Do not remove the base cover assembly in the following situations. Otherwise, there might be a risk
of short circuits.
• When your computer has the removable battery installed
• When your computer is connected to ac power
For access, do the following:
1. Disable the built-in battery. See "Disable the built-in battery" on page 31.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Close the computer display and turn over the computer.
Removal procedure
32
ThinkPad X13 Gen 4 and ThinkPad X13 Yoga Gen 4 Linux User Guide
and print the following instructions.