Spectralink 7420 and Spectralink 7440 User Guide
14088700 Version 13
September, 2013
4
•
Charger part number: 8464 2462
•
Power Supply Unit part number: 8464 2602
Battery Information
The battery is connected to the handset when it is shipped from the factory. To change the battery
you must unscrew the plate on the rear of the handset to access the battery compartment.
To remove the battery cover, use a normal screw driver. Insert it into the small crack behind the
blind cover and break to open the handset.
You can find the product label, including the CE logo, in the battery compartment.
The only battery that can be used for the Spectralink 7420 and Spectralink 7440 handset is the
following:
•
Battery part number: 8474 3411.
Charging the Battery
When you charge the battery for the first time, you must leave the handset in the charger for 14-16
hours for the battery to be fully charged.
During normal operation, it takes approximately 3.5 hours to charge the handset from completely
discharged to its full capacity.
Place the handset in the charger. When the handset is turned on, the display shows the charging
status in line 3.
For correct charging, ensure that the room temperature is between 0°C and 25°C. Do not place
the handset in direct sunlight. The battery has a built-in heat sensor which will stop the charging
if the battery temperature is too high.
When the handset is placed in the charger it reacts normally to incoming calls, it does not vibrate,
and B-answer is inactive (B-answer is also called Automatic Answer). If the battery is fully
discharged, up to 10 min. may pass before charging begins and the handset can be turned on.
When charging begins, the status is shown in the 3rd line of the display and the LED flashes
slowly.
It is necessary to recharge the battery when the display shows BATTERY LOW, or if it cannot be
turned on. The LED flashes at a low frequency while charging and lights constantly when the
charging is finished. The display goes back to normal mode when fully charged.
Note
The charger can only by used with this specific power supply unit.
