Lenovo ThinkPad L540 User Manual page 106

DANGER
If the backup battery is incorrectly replaced, there is danger of an explosion. The backup battery
contains a small amount of harmful substances. To avoid possible injury:
• Replace only with a battery of the type recommended by Lenovo.
• Keep the battery pack away from fire.
• Do not expose it to excessive heat.
• Do not expose it to water or rain.
• Do not short-circuit it.
• Do not drop, crush, puncture, or subject to strong forces. Battery abuse or mishandling can
cause the battery to overheat, which can cause gasses or flame to "vent" from the battery
pack or coin cell.
To replace the backup battery, do the following:
1. Turn off the computer, then disconnect the ac power adapter and all cables from the computer.
2. Remove the battery pack. See "Replacing the battery pack" on page 67.
3. Loosen the screws
the direction shown by the arrow
4. Detach the connector
5. Install the new backup battery
90
User Guide
1 that secure the base cover assembly. Then remove the base cover assembly in
2 .
1 , and then remove the backup battery
1
and attach the connector
2 .
2
.