Lenovo ThinkPad L420 User Manual page 108

the performance or safety of unauthorized batteries, and provides no warranties for failures or damage
arising out of their use.
Read the following prerequisites before you replace the battery.
Prerequisites for the procedure
DANGER
If the rechargeable battery pack is incorrectly replaced, there is danger of an explosion. The battery
pack 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.
Replacing the battery
To replace the battery, do the following:
1. Turn off the computer.
2. Close the computer display.
3. Disconnect the ac power adapter and all cables from the computer.
4. Hold the battery release latch to the unlock position
90
User Guide
1
, and remove the battery in the direction of
2
.