Installing The Power Adapter - Huawei U.S. Cellular FT2260 User Manual

Installing the Power Adapter

Under normal operation, the Home Phone device is powered from an A.C. power
outlet using the power adapter that is included with the device.
Power the device off, connect one end of the power adapter to the DC input port and
the other to an A.C. power outlet.
 Note:
Use the battery only when there is a power failure or no power outlet is available.
Ensure that the battery has been fully charged before using the device without the A.C
power adapter connected.
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