SoftBank 840P User Manual page 37

Battery Time
⿟
Using handset in poor conditions may shorten battery time.
・ 
Extreme temperatures
・ 
Impaired handset, battery or Charging Terminals
・ 
Signal is weak/handset is out-of-range
・ 
Handset is left mid-operation (not in Standby)
・ 
Playing music or using S! Appli, etc.
⿟
Extending battery time
Example:
・ 
Select shorter Display backlight time; select OFF or shorter time for
Keypad Backlight ( Z P.15-6).
・ 
Select Silent for Key Tone Volume (
When Battery Runs Out
⿟
Unless a Call is in Progress
A message appears and warning tone sounds. Handset power turns off
automatically after two minutes; press
warning tone manually. Charge or replace battery.
・ 
If Manner Mode is active/Warning Tone Off , nothing sounds.
⿟
During a Call
A message appears and warning tone sounds via Earpiece or Speaker.
After 90 seconds, call ends and handset shuts down in 30 seconds.
Charge or replace battery.
Z P.15-3)
L , S or K to cancel
Battery Strength Indicator
⿟
Battery Strength indicator changes as remaining usage time decreases.
Charge or replace battery when battery level is low (
message appears on Display.
Battery Voltage
Operating
Voltage
Level 3
Approx. 70%
Remaining Strength (at 25°C)
Z P.1-9) or a
Low battery warning message
appears. Charge or replace
battery immediately.
Red
Level 2 Level 1 Level 0
Approx.20% Approx.10%
Operating Time
1
1-11