Hi I have had my S4 for about 3 months after having an iphone for the past 4 years. I pretty much worked out everything I need to and have been very impressed with the device since the switch. However this weekend the battery has died extremely quick with very little use. I found checking my battery usage that both Android OS and Android idle are using 26% and 16% of my battery which seems a bit excessive and the device was getting hot over the weekend which leads me to think something is running in the background. I am sure someone will tell me to use the search bar but I am new to this. It is running Android 4.2.2. Thanks for the help in advance as I would to find out why this is happening!!!