Samsung Impression SGH-A877
Question for you Impression users
To avoid this issue you can shut down your phone while it charges over night, but only once every other night and not every night otherwise the battery is drained of its true capacity over time.
The 'over charging of battery capacity' statement isn't limited to the Impression, this is important for all cellphones of all carriers.
Like how you use more gas to turn off and on a car than to leave it running for a minute to be right back in a 7eleven somewhere.