ZTE Corporation ZTEWP822R Benutzerhandbuch

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3. Adapter: 
Connect the lead from the external power adapter to socket at 
rear back of phone set and connect adapter to an external AC socket.   
Good ground may guarantee phone’s reliable performance. 
2.6 Power Supply   
There are two ways of power supply: 
1. 
External power supply 
2. 
Spare rechargeable battery supply 
As usual, suggest make use of external power supply.  When 
power down or unavailable power supply nearby, you can use battery 
for backup.   
With external power supply connection and switch BATT to “ON”
phone can automatically detect battery’s current capability and charge 
the battery accordingly. At that time, external power adapter becomes 
hot. It is normal.   
Note:  When the battery is in low-voltage, phone may not work 
normally: 
- In state of standby, phone alerts. 
- During a call, alert may interrupt your call. 
- Phone powers off automatically when in extreme 
low-voltage.