Ericsson DT400 User Manual page 90

Installation
90
DT430
The DT430 telephone is designed for usage in rough environments.
This Cordless is safe to use in explosion risk environments (EX-
classification) and therefore is equipped with a special battery.
Removing and fitting the battery for intrinsically safe
phones
To remove and fit the battery, you have to use the screws at the
back of your phone, as shown below. You do not have to use the
ordinary plates to release and fasten the battery.
Use the screws on the back of the battery
Battery performance
All Cordless are supplied with a high capacity nickel metal hydride
(NiMH) battery. The table below indicates the performance.
Talk time
(hours)
High capacity
NiMH battery:
BusinessPhone – Cordless DT400/DT410/DT420/DT430
Screws to unlock or fasten
Standby time
(hours)
10 100
Charge time
(minutes)
60