User's Manual

Using the Battery
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 specific configuration.
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.
Temperature Capacity
-10°C 50%
0°C 80%
20°C 100%
45°C 100%
55°C 80%
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 is
equipped with a fan to remove heat from the processor.
CAUTION The Thermal Grate gets warm during use of the Duo-Touch. 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
How your computer responds to a low battery condition can be set by going to Start, Control Panel,
Power Options, and selecting the Alarms tab.