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
•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, refer to the instructions for the computer:
•“Lenovo B480” on page 33
•“Lenovo B580” on page 34
Lenovo B480
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. Wait three to five minutes to let the computer cool.
2.Close the computer display, and turn the computer over.
3.Remove the battery. See “Replacing the battery” on page 31.
4.Remove the screws 1 , and then remove the cover 2 .
1
1
2
2
5. Detach the connector
3 . Then remove the backup battery
4.
Chapter 7. Replacing devices 33
