Replacing The Backup Battery - Lenovo ThinkPad T520 User Manual

Replacing the backup battery

Before you start, print these instructions.
To replace the backup battery under the keyboard with a new one, read the following prerequisites.
Prerequisites for the procedure
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 under the keyboard, do the following.
Removing the backup battery under the keyboard
1. Turn off the computer; then disconnect the ac power adapter and all cables from the computer. Wait for
a few minutes, till the inside of the computer cools before you start the following procedures.
2. Close the computer display, and turn the computer over.
3. Remove the battery. For details, refer to the instructions in "Replacing the battery" on page 119.
4. Remove the keyboard. For details, refer to the instructions in "Replacing the keyboard" on page 130.
5. Detach the connector (1). Then remove the backup battery (2).
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User Guide