The battery in your DECT Handset needs to be charged in its charging cradle.
Set Up the Charging Cradle
You use the charging cradle to charge the handset. The cradle has a built-in USB cable that plugs into the power adapter. The power adapter is designed for your country's electrical outlet configuraiton and power rating.
Place the cradle on a level surface.
Plug the USB connector of the power cord into the power adapter.
Plug the power adapter into the electrical outlet.
Charge the Handset Battery
You use the handset charger to charge the handset battery. The battery comes partially charged, but you should charge it for a minimum of 10 hours before you use it for the first time. If you don't fully charge it, you may decrease the life of the battery.
If you remove and replace the battery from the handset, you need to fully discharge and then fully charge the battery so that the battery indicator is accurate.
Charge the battery with the handset charger provided. If you use another method, you can damage the battery, the handset, or your surrounding area.
Only charge the battery in environments where the temperature is between 32°F (0°C) and 104°F (40°C).
Do not charge the battery in hazardous environments or where there is explosion danger.
When you place the handset into the charger, it turns on (if not already on) and displays a message that the handset is charging. The handset screen dims and turns off at the configured time.
If the LED on the handset starts to flash, the handset is updating its firmware.
Before you begin
Set up the cradle.
Ensure that your handset charger is plugged into the electrical outlet.
Place the handset in the charger so that the contacts in the handset and the contacts in the charger match.
The handset screen should turn on and display a message that the handset is charging. If this doesn't happen, remove the handset from the charger and try again.