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Replacing the backup battery
Before you start, print these instructions.
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 re.
• 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 ame to “vent” from the battery
pack or coin cell.
To replace the backup battery, do the following:
1. Disable the built-in battery. See “Disabling the built-in battery” on page 59.
2. Close the computer display, and turn the computer over.
3. Remove the base cover assembly. See “Replacing the base cover assembly” on page 61.
4. Detach the connector 1 , and then remove the backup battery 2 .
Chapter 6. Replacing devices 71