Checking the Battery Pack (2625)
Checking the Battery Pack
Battery charging will not start until the Fuel-Gauge shows that
less than 90% of the total power remains;
with this condition the battery pack will charge to 100% of its
This protects the battery pack from being
over-charged or having a shortened life.
Before you perform the following procedure,
be sure you have the correct
battery pack for this model.
- Power-off the computer.
- Remove the battery pack and measure the voltage between battery
terminals 2 (+) and 6 (-).
See the following figure.
- If the voltage is less than +7.2 Vdc, the battery pack has
been discharged or is defective.
Recharge the battery.
If the recharging does not work,
go to Step 5 to check the charging circuit.
If the voltage is still less than +7.2 Vdc after the recharging,
replace the battery.
- If the voltage is more than +7.2 Vdc,
measure the resistance between
battery terminals 4 and 6.
The resistance must be 4K ohms to 30K ohms.
If the resistance is not correct, replace the battery pack.
If the resistance is correct, replace the DC/DC card.
- To check the charging circuit, do the following.
Plug in the AC Adapter with the battery pack removed, then
power-on the computer.
- Measure the charging voltage between DC/DC terminals
2 (+) and 6 (-).
- If the voltage is less then +9.0 Vdc, replace the DC/DC card.
If the voltage is more than +9.0 Vdc, the charging circuit is
working correctly, replace the battery pack.
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