Replacing the backup batteryBefore you start, print these instructions.To replace the backup battery under the keyboard with a new one, read the following prerequisites.Prerequisites for the procedureDANGERIf the backup battery is incorrectly replaced, there is danger of an explosion. The backup batterycontains 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 cancause the battery to overheat, which can cause gasses or flame to “vent” from the batterypack or coin cell.To replace the backup battery under the keyboard, do the following.Removing the backup battery under the keyboard1. Turn off the computer; then disconnect the ac power adapter and all cables from the computer. Wait fora 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).124 User Guide
