NEC MOBILEPRO 900 - Manual (Page 56)

2-12 Introducing the MobilePro
Managing MobilePro Power
When your MobilePro is connected to an AC power source and the
main battery is removed from the system, be sure to replace the main
battery before disconnecting the AC adapter to prevent possible data
loss.
The MobilePro’s internal data backup battery
provides power to maintain the memory contents for a limited period of
time when the main battery is removed and the unit is not connected to
an AC power source. The backup battery does not provide sufficient
power to operate the system.
Do not remove the main battery from the unit for an extended period of
time unless the unit is connected to an AC power source.
Replacing the Main Battery
Note the following when replacing batteries:
! If the main battery becomes weak, the MobilePro automatically
turns off. Recharge or replace the main battery immediately if the
power goes off.
! The MobilePro backup battery maintains your data for several
hours whenever the main battery is depleted or removed.
If you fail to replace a depleted main battery
for an extended period of time and the backup battery is weak, the
contents of the MobilePro memory and all user data may be lost.
Should you notice the life of a charged battery pack is short, replace it
with a new one. Use the following procedure to replace a battery pack.
1. Save your data, turn off unit power, and close the display panel.
Disconnect any cables attached to the unit, such as the PC Connect
cable.
2. Have a lithium ion battery pack available.
3. Remove the battery pack as follows: