Checking The Coin-Cell Battery - Lenovo ThinkPad L560 Hardware Maintenance Manual

4. Depending on the voltage that you measure, do one of the following:
• If the voltage is less than +11.0 V dc, recharge the battery. If the voltage is still less than +11.0 V
dc after recharging, replace the battery pack.
• If the voltage is more than +11.0 V dc, discharge the battery pack until the voltage becomes less
than +11.0 V dc. Then recharge the battery pack. If the voltage is still less than +11.0 V dc, replace
the battery pack.
Note: Recharging will take at least three hours, even if the battery status indicator does not turn on.
5. Replace the system board if the new battery pack is not charged.

Checking the coin-cell battery

To check the coin-cell battery, do the following:
1. Turn off the computer, and unplug the ac power adapter from it.
2. Turn the computer upside down.
3. Remove the battery pack (see "1010 Battery pack" on page 66).
4. Remove the coin-cell battery (see "1080 Coin-cell battery" on page 72).
5. Measure the voltage of the coin-cell battery. See the following figure.
• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the coin-cell battery.
• If the coin-cell battery discharges quickly after replacement, replace the system board.
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Hardware Maintenance Manual
Wire
Voltage (V dc)
Red +2.5 to +3.2
Black Ground