HP Jornada 430se User Manual page 18

12 Hewlett-Packard Jornada 430/430se Palm-size PC
Before using battery power, charge the battery overnight by
connecting the AC adapter (see the Connecting the travel
cable and AC adapter section in this chapter). While
charging, you may see backup battery low messages. These do
not appear once the battery is fully charged. If you do not
charge overnight, the backup battery low messages may
continue to appear. You can use the P/PC while charging.
About the backup battery
The rechargeable backup battery is a permanent part of the
HP Jornada, so you do not need to install or replace it.
The backup battery is being charged automatically when the
P/PC is connected to AC power.
Make sure you connect to AC power to charge as soon as you
see a backup battery low warning. Continue to charge until
the backup battery level is "good" (check the Status tab of the
Power panel; see the Using the Status tab section in chapter
3).
Do NOT replace your main battery when the backup battery is
low.
Connecting the travel cable and AC adapter
You can operate the HP Jornada on AC power using the AC
adapter. The AC adapter accepts voltages from 100 V to 240 V, so
you can use it anywhere in the world. However, you may need a
plug adapter to accommodate different electrical outlets.
The travel cable and AC adapter