Lenovo ThinkPad T520 User Manual page 138

Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
To replace the battery with a new one, read the following prerequisites.
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.
To replace the battery, follow the procedures below.
Replacing the battery installed in the battery space of your computer
1. Turn off the computer, or enter hibernation mode. Then disconnect the ac power adapter and all cables
from the computer.
2. Close the computer display, and turn the computer over.
3. Unlock the battery latch by sliding it to the unlock position (1). Holding the latch in the unlocked
position, remove the battery (2).
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