Checking the battery pack – IBM THINKPAD S05L-1270-01 User Manual

Page 145

Checking the Battery Pack:

Battery charging will

not start until the Fuel-Gauge shows that less than 95% of
the total power remains; with this condition the battery
pack will charge to 100% of its capacity. This protects the
battery pack from being overcharged or having a
shortened life.

Do the following:

1. Power off the computer.
2. Remove the battery pack and measure the voltage

between battery terminals 1 (

) and 4 (

−

). See the

following figure:

Note: Signal lines, not used in these steps, are used

for communication between the system and
the battery.

3. If the voltage is less than

11.0 V dc, the battery pack

has been discharged. Recharge the battery pack.

Note: In this case, the battery pack is

over-discharged. It takes at least 2 hours to
recharge the battery pack even if the indicator
does not turn on.

If the voltage is still less than

11.0 V dc after

recharging, replace the battery.

Note: If the voltage of the battery pack is 0 V, it is

not defective.

4. If the voltage is more than

11.0 V dc, measure the

resistance between battery terminals 3 and 4. The
resistance must be 4 to 30 K ohm.

Terminal

Voltage (V dc) / Signal

0 to

13.5

Send

Thermal

Ground (

−

)

Select

ThinkPad 560, 560E (2640)

133