AASTRA DT292 for MX-ONE User Guide EN - Manual (Page 94)

Installation
DT292 94
Battery
The cordless phone is powered by a rechargeable battery. You can
fully charge an empty battery by placing the cordless phone in the
charger for 4 hours. A fully charged battery gives you up to 17
hours calling time or up to 140 hours standby time.
Note: The calling time and standby time is shortened if the
hands-free speaking function is used a lot.
The cordless phone has a battery meter, which indicates the power
remaining in the battery.
Note: The cordless phone is powered by a Nickel Metal
Hydride (NiMH) battery. It can be recharged at any time. To
keep the battery fully charged, you can put or leave the
cordless phone in the charger without any problem.
Reading the battery meter
When the battery is fully charged, the battery meter on the cordless
phone display consists of four blocks. The number of blocks
decreases as the battery discharges. If the battery is almost empty,
the battery meter and the red light on the cordless phone flash. An
alarm sounds if there is less than 15 minutes calling time remaining
in the battery.
Battery performance
The table below indicates the performance:
Talk time
(hours) Standby time
(hours) Charge time
(minutes)
High capacity
battery: 17 140 240