This few days i encounter problem as batt drop from 100% to 70% in just afew minutes.. then charging rate is super slow.. yesterday i charge my phone from no batt and the phone turn off from 10pm until 9am only 45% charged.. then i check the batt status under setting and it detect the ac charger as usb.. and then i notice got some process i dont know what called GPSD take up until 38%.. searching through google up to no avail.. some said under setting > security > enter ur detail then slide it off.. wth.. some said it was the android remote control setting.. so i figure out that the process is the remote control service.. i enter my samsung acc password and turn it off.. and my batt usage back to normal and the gpsd process dissapear.. about the slow charging i dont know if its a bug or not.. u can check it through batt status menu if it detect as usb or ac.. if it detect ur ac charger as usb, unplug ur charger and replug again until it say charging (ac)..

Phew.. rarely post this long but i hope u guys find this useful.. never happen to me on ics.. now im on jb malaysia stock no root..