Checking The Coin-Cell Battery - Lenovo ThinkPad X260 Hardware Maintenance Manual

1(+)
3. If the voltage is less than +11.0 V dc, the battery has been discharged.
If the voltage is still less than +11.0 V dc after recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 5 and 7. The
resistance must be 4 to 30 K Ω. If the resistance is not correct, replace the battery. If the resistance
is correct, replace the system board.

Checking the coin-cell battery

To check the coin-cell battery, do the following:
1. Disable the built-in battery. See "Disabling the built-in battery" on page 60.
2. Remove the coin-cell battery. See "1110 Coin-cell battery" on page 76.
3. Measure the voltage of the coin-cell battery.
• 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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ThinkPad X260 Hardware Maintenance Manual
7(-)
6(-)
5
3 4
2(+)
Terminal Voltage (V dc)
1, 2 + 0 to + 12.6
6, 7
Ground (-)
Wire
Voltage (V dc)
Red +2.5 to +3.2
Black Ground