NEC M155 User Manual

NEC M155 User Manual Manual pdf 19 page image

Getting started19Charging guidelinesObserve the following guidelines when you charge the M155:Charge the battery for at least 6 hours before you use the M155 forthe first time.The battery attains maximum power output only after severalcharging and discharging cycles.Do not leave the M155 connected to the charger for more than amonth without using it.You can charge and discharge the battery thousands of times.Under normal conditions the battery life time exceeds the life timeof the M155. If eventually the operating time (talk and standby time)becomes significantly shorter than usual, you’ll need to replace thecomplete M155.Charging and operating timesA discharged battery requires no more than 8 hours to completelyrecharge. A completely charged battery provides the M155 set with upto 8 hours of operating time1 and 80 hours of standby time.Charge displayThe battery charge status appears on the display screen. When thebattery is nearly discharged, the battery symbol flashes and a warningtone sounds. If you are on a call, approximately 3 to 5 minutes of talktime exists before the M155 switches off. If you are not on a call and theM155 is not in the charging station, the message Battery low appearson the display.The following table shows the battery charge status icons:Table 1: Battery charge status iconsIcon DescriptionLess than 20%1 Operating time here means talk time and sending/receiving messages.