Samsung SPH-a500 Series - Manual (Page 21)

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• Green indicates that the battery is fully charged.
4. You can make a phone call when the phone is plugged into the travel
adaptor. The adaptor will continue to charge the battery even when you
are making the call.
Note: The battery charges faster when the phone is turned off.
Low battery indicator
You can tell whether or not your battery needs to be recharged by checking the
battery indicator (this icon is located in the upper-right corner of the
display screen). The presence of all three bars indicate a full charge. No bars
(the battery icon is empty) means your battery must be charged.
The empty battery icon
Two to three minutes before the battery charge level gets too low to operate the
phone, the battery sensor will let you know by blinking an empty battery icon
( ), and sounding a tone. If you continue to operate the phone without
charging the battery, the phone will automatically turn off. If this happens, your
wireless call will be terminated. Be sure to monitor the battery strength icon
and make certain your battery is adequately charged.
Your phone’s modes
Answer mode
With this option activated, you can select how you want to answer your phone
when you receive an incoming call.
Input mode
Use input mode to enter text, numbers and symbols into various screens.