Mitel 5603 Benutzerhandbuch

Maintenance of Batteries

Battery Warnings

During a call, only the corresponding battery warning signal will notify the user. The warning 
signal cannot be silenced during a call. When not in call, the warning signal can be silenced 
by pressing 

.

Charge the Battery

Place the handset in the desktop charger or in the rack charger. The battery is being charged 
when the LED on the handset is steady orange. When the battery is fully charged the LED will 
be green.

An animated battery icon 

 is also shown in the display indicating charging by starting with 

its current charge and ending with the full charge. A filled battery icon 

indicates a fully 

charged battery.

Replace the Battery

If the standby time for the handset becomes too low, the battery should be replaced by a new 
one. Please contact your system administrator or your supplier, for information about new 
batteries. Attach the battery as described in the illustration below. The battery is easy to replace. 
It is attached inside the battery lid and is connected to the handset in such a way that no 
miss-contact is possible.

The "Low battery" icon appears when the battery has 10% or less remaining capacity left. 
In addition; a warning signal sounds every minute, the LED flashing orange, and the 
window "Battery low. Charge now." appears.

The "Empty battery" icon is flashing when the battery has 5% or less remaining capacity 
left. In addition; a warning signal sounds every second, the LED flashing red, and the 
window "Battery empty. Shutting down." appears.

Note: Only use the prescribed chargers for charging.