NEC 750C User Manual page 26

NOTE
If you receive messages indicating that both
the main battery and the sub-battery (back-up bat-
tery) are very low, replace the back-up battery first.
If a drained main battery is not replaced, the back-
up battery drains more quickly than normal.
Disconnect any cables attached to the unit, such as the
2.
AC adapter cable.
Have a new back-up battery available.
3.
!
Only replace the back-up battery with a CR2032
Lithium battery.
Using another battery type can result in an explo-
sion or fire.
Getting Familiar with Your MobilePro 750C 2-13
WARNING