7. Reinstall the external battery pack.
8. Connect the ac power adapter and all cables.
Replacing the coin-cell battery
Before you start, print these instructions.
DANGER
If the coin-cell battery is incorrectly replaced, there is danger of an explosion. The coin-cell 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 battery.
To replace the coin-cell battery, do the following:
1. Disable the built-in battery. See “Disabling the built-in battery” on page 71.
2. Close the computer display, and turn the computer over.
3. Remove the external battery pack. See “Replacing the external battery pack” on page 72.
4. Remove the base cover assembly. See “Replacing the base cover assembly” on page 75.
5. Detach the connector
1
, and then remove the coin-cell battery
2
.
92
User Guide
Summary of Contents for Thinkpad T440
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