Well, as the phone feels hotter and hotter, the battery juice keep draining by the minutes.
Anyway, i had it all drained till shutdown and recharge the phone overnight till 100%. Unplucked the charger at 8.30AM, and now is 4.52PM and the battery is 72%. Not as good as the iphone 4 used to be with same amount of stuff turn on. Now the phone is normal and not feeling overheating.