About the Battery
The battery is a Lithium-Ion "smart" battery. It contains a temperature sensor and a memory device that stores
information about the battery, such as how much charge is left and how many times it has been recharged. The
parameters for the "management" of the battery are also kept in the battery's memory. The life expectancy will
depend strongly on the care of the battery, the individual usage pattern and the Duo-Touch II's specific
configuration. Generally, a battery pack is good for 300 - 500 charge/discharge cycles during its useful life (70% of
original capacity).
CAUTION
Shutdown the computer and remove from external power before removing the battery to prevent
potential loss of data.
The battery pack is most efficient at room temperature. However, its efficiency fails as the temperature varies from
that range. The chart below shows approximate capacity values with respect to temperatures.
To prevent damage, the charge circuitry is turned off for temperatures that are too high (above approximately 115°F
or 46°C) or too low (below approximately 32°F or 0°C). Your Duo-Touch II is equipped with a fan to remove heat
from the processor.
CAUTION
The
Thermal Grate
gets warm during use of the Duo-Touch II. Do not block the flow of air to the
Thermal Grate.
NOTE
A "cold-soaked" battery has an even lower capacity and may not power a unit.
Monitoring Battery Power
There are two ways to monitor how much power the battery has left:
1. Hover your
pen
over the battery icon in the taskbar to check your battery power status. The status will show
as a pop-up.
2. Alternately, select Start, Control Panel. If you are in Category View, select
Performance and Maintenance
,
and then select
Power Options
. If you are in Classic View, select
Power Options
and then tap the
Power
Meter
tab to see how much battery power remains.
NOTE
If you do not see the battery icon, enable it in
Start, Control Panel, Power Options
. Choose the Advanced
tab and select "Always show icon on the taskbar."
Low Battery Alarms
CAUTION
When battery power is low, the alarm beeps or displays a warning on your screen. Take immediate
action, such as saving files or connecting to the
AC adapter
, or data may be lost.
When the computer alerts you that the battery is low,
immediately
do one of the following:
1. Connect the AC power adapter
Temperature
Capacity
-10°C
50%
0°C
80%
20°C
100%
45°C
100%
55°C
80%
Page 27 of 57
Duo-Touch II Help
2/28/2008
file://C:\Documents and Settings\harwoodm\Local Settings\Temp\~hh5E31.htm
