Lenovo ThinkPad T520 (English) User Guide - Page 138
Do not short-circuit it., Do not expose it to water or rain.
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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). 120 User Guide