1090 Backup Battery - Lenovo ThinkPad T420 4177 Hardware Maintenance Manual

Table 17. Installation steps of keyboard (continued)
3. Gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position.
4. Secure the keyboard by tightening the screws from the bottom side of the computer.

1090 Backup battery

For access, remove these FRUs in order:
• "1010 Battery pack" on page 66
• "1080 Keyboard" on page 78
DANGER
Use only the battery specified in the parts list for your computer. Any other battery could ignite
or explode.
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Hardware Maintenance Manual