Replacing the Real Time Clock Battery
Battery Calibration
The battery calibration process fully charges, discharges, and recharges the battery. This allows the Windows
battery gas gauge to accurately monitor battery status.
It is recommended you calibrate your battery:
z
the first time you use it
z
after it has been stored for awhile
z
if the gas gauge has become inaccurate.
z
for optimum performance, we recommend calibrating the battery and optional secondary battery every three
months
You can calibrate your main battery or optional
second external battery
from the BIOS Setup Utility. You can also
calibrate the main battery from within Windows.
Windows Level Battery Calibration
BIOS Level Battery Calibration
Battery Calibration takes from 10 to 16 hours, depending on how much power the battery already contains. You can
speed up calibration by starting with a fully charged battery.
NOTE
External power is required for battery calibration.
Battery Charging
When you use the AC adapter to connect your Duo-Touch II to a power outlet, the internal battery automatically
begins to recharge. While the battery is charging, the
Battery Status LED
turns orange after 6-12 seconds and stays
solid orange until the battery is fully charged. When the battery is fully charged, the LED will turn green.
If your computer is turned off, a fully discharged battery takes about 3 hours to recharge. If your computer is turned
on and is not in suspend mode , it takes about 3-5 hours to recharge the battery. Refer to the following table:
NOTE
A fully charged Li-Ion battery can run the Tablet PC for approximately 3 hours of normal use. (According
to Battery Mark benchmark tests.) Use of external devices, such as the wireless radio, cause increased battery
consumption.
If a second external battery is attached to your Duo-Touch II, this battery will begin charging once the main battery
is fully charged.
Using the Battery
Charging
Discharging
System On
3-5 hours
3 hours
System Off (Suspend to
RAM
and Suspend to Disk)
3 hours
_
Page 26 of 57
Duo-Touch II Help
2/28/2008
file://C:\Documents and Settings\harwoodm\Local Settings\Temp\~hh5E31.htm
