IBM Z50 - Manual (Page 27)

12 IBM WorkPad z50, Mobile Companion 12
Checking Operational Charging: There is no difference in
battery charging time whether the system is fully operational
or not. To check the battery charging, use a discharged
battery pack or a battery pack that has less than 50% of total
power remaining.
Turn on the WorkPad z50 while the AC Adapter is connected
to the system. The External Power/Charge Status LED will
change to amber while the battery is charging. When the
battery is fully charged (after about 1 – 2.5 hrs., depending
on the battery’s initial charge) the battery terminal voltage
should be around 12.6V dc. If the voltage is far less, or has
not increased from the initial voltage, then repeat the
procedure with another discharged battery pack. If this
brings the same result, then suspect a mainboard failure.
Optional Dry Cell Battery Checkout: If the optional Dry
Cell Kit (dry cell battery pack) has a problem, refer to the
following:
1. Enter suspend mode by pressing the Power button.
2. Remove the dry cell battery pack and measure the
voltage between the battery terminals. See the
following figure:
1
7
Terminal Voltage (V dc)
1 8.8 – 12.8 V
7 Ground (-)
3. If the voltage is less than 8.8 V dc, the dry cell battery
pack has been discharged. Replace the dry cells.
If the dry cell battery pack is extremely hot, it must be
replaced.