Replacing The Battery - Lenovo ThinkPad T420si User Manual

5. Detach the connector (1). Then remove the backup battery (2).
Installing the backup battery
1. Install the backup battery (1). Then attach the connector(2).
2. Reinstall the keyboard. For information about how to reinstall the battery, refer to "Replacing the
keyboard" on page 102.
3. Reinstall the battery. For information about how to reinstall the battery, refer to "Replacing the battery"
on page 97.
4. Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on.

Replacing the battery

Before you start, print these instructions.
This system does not support batteries that are not genuine Lenovo-made or authorized. The system will
continue to boot, but may not charge unauthorized batteries.
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
.
Chapter 6 Replacing devices
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