I updated my stock S4 the other day and my battery life has just dropped off a cliff. Before the update, a normal day would use 50-60% of my battery. Since the update, i'm down around 10% by 10pm in the evening ... and I dont use my phone very much at all. Wifi is on, GPS and Bluetooth are off. And it appears that the Android System is using about 50% of the battery. (Right now, the phone has been on for 2.5 hours with no calls and no web surfing and the battery is down to 85%)
Any idea what might be causing the problem?? or a solution?