Charging Guidelines; Charging And Operating Times; Charge Display - NEC M155 User Manual

Charging guidelines

Observe the following guidelines when you charge the M155:
Charge the battery for at least 6 hours before you use the M155 for
the first time.
The battery attains maximum power output only after several
charging and discharging cycles.
Do not leave the M155 connected to the charger for more than a
month without using it.
You can charge and discharge the battery thousands of times.
Under normal conditions the battery life time exceeds the life time
of the M155. If eventually the operating time (talk and standby time)
becomes significantly shorter than usual, you'll need to replace the
complete M155.

Charging and operating times

A discharged battery requires no more than 8 hours to completely
recharge. A completely charged battery provides the M155 set with up
to 8 hours of operating time

Charge display

The battery charge status appears on the display screen. When the
battery is nearly discharged, the battery symbol flashes and a warning
tone sounds. If you are on a call, approximately 3 to 5 minutes of talk
time exists before the M155 switches off. If you are not on a call and the
M155 is not in the charging station, the message
on the display.
The following table shows the battery charge status icons:
Table 1: Battery charge status icons
Icon
1
Operating time here means talk time and sending/receiving messages.
1
and 80 hours of standby time.
Description
Less than 20%
Getting started
Battery low appears
19