Aastra openphone 28, User Manual

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The Features of Your Telephone
15
You can remove the battery pack from the handset if you are not going to use the tel-
ephone for an extended period of time, for example when you go on holiday. You will
see that the battery pack will only have discharged minimally when you re-install it at
a later date.
Do not leave the battery pack in direct sunlight. You will be rewarded with a long
battery life.
Charging and operating times
Charging time
: (fully discharged battery) approximately 5 hours to be fully charged.
Talk time : up to 8 hours (when fully charged).
Stand-by time : up to 75 hours (when fully charged).
Note
Batteries with an unknown charging status are fully charged in approximately
14 hours.
Charge display
The charging status of the battery is shown in the display as follows:
Charge warning
When the battery capacity is nearly exhausted, the battery symbol will flash in the
display.
If you are making a call at the time, you still have up to three minutes of talk time
before the handset switches itself off. If you are not making a call and the handset is
not in the charging station, “Battery empty” appears in the display. Now you can no
longer make a telephone call.
80 - 100 % charged
60 - 80 % charged
40 - 60 % charged
20 - 40 % charged
0 - 20 % charged
(Frame flashes) Battery nearly discharged