One sign of a failing battery is no
power, i.e., the phone does not light up or make any sounds. If your
phone's indicator lights and back lit keypad are working, or you can
hear keypad beeps or alerts, it is likely that the issue is not
related to your battery
When a cell phone only powers on when
it is plugged into a power source, this can be another sign that the
battery is no longer functioning.
All cell phones have some method of
indicating when the charging is complete and the battery is at full
capacity. If your phone shows this but dies much sooner than normal,
it is possible that you need a new battery.
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