Operating Time And Temperature - Siemens EF81 User Manual

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The charge level of the battery is
only displayed correctly after an un-
interrupted charging/discharging
cycle. You should therfore not remove
the battery unnecessarily and where
possible not end the charging process
prematurely.
The power supply unit heats up when used
for long periods. This is normal and not
dangerous.
If the battery is removed for longer than
30 seconds, the clock must be reset.
Operating time and
temperature
The operating time depends on the
operating conditions. Extreme tem-
peratures considerably reduce the
phone's standby time. Avoid placing
the phone in the sun or on a heater.
The phone may heat up during data transfer
or when using UMTS. This is normal and not
dangerous.
Talktime:
• UMTS: up to 210 minutes
• GSM: up to 270 minutes
Standby time:
• UMTS: up to 250 hours
• GSM: up to 300 hours
The talktime and standby time depend on
the network environment. For more exam-
ples of functions that reduce the standby
time, e.g. animated screensaver, fast
search, see page 144.
Getting started
Charge icon not visible
If the battery has been discharged
fully, the charge icon is not immedi-
ately visible when the power supply
is plugged in. It will appear after up
to two hours. In this case the battery
is fully charged after 3 to 4 hours.
Display while in service
Charge level display during opera-
tion (empty–full):
V W X
Battery low warning
When the battery is almost empty
you are warned twice. The first
warning appears when the battery
has 10 minutes of power remaining.
The second warning appears when
the battery has 1 minute of power
remaining.
Press to confirm warning.
§OK§
Powering off
If the battery is completely empty,
the phone switches off automatically.
If the phone powered down because of
low battery, it will power on again automat-
ically when charged.
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