brightness wouldnt have any effect unless the phone is set up to not turn off the screen while charging which has to be set manually, background processes are possible but for that kind of battery drain from just background processes it would have to be running something that takes up the whole cpu at all times which would cause an even bigger problem, the phone would barely be running at all. data usage however is a possibility, if you are using all of your 3g connection at all times even when you arent touching the phone that could potentially drain the battery while charging, other than that though im gonna have to say it would be hardware issues, bad cord, bad charger, bad battery, bad wiring, bad port. and as far as contacting zte or boost, i have never seen either of them be helpful myself, every time i ever had to call boost they didnt know what i was talking about, and they not only werent helpful but half the time i had to tell them how to do their job. sad really. and last time i tried to talk to zte they told me they dont have access to things they make, they are notorious for blaming others for their mistakes, sending out the same pre written emails to everyone that have nothing to do with the questions you ask, and lieing to customers just to make them happy so theyll stop bugging them
