[Q] S4 Battery Drain Caused By Apps
I recently purchased a new Samsung Galaxy S4 (9505 version) to replace my HTC One X as the battery life was awful. I was shocked that the S4 actually had a much worse battery life than my old HTC One X. After a factory reset on the S4 and everything turned off (GPS, Wifi, Bluetooth, 3/4G, Account Sync), the battery would only last 12 hour on standby without any usage.
I eventually chose to install a custom rom, and went with this: http://forum.xda-developers.com/show....php?t=2544474
I found the battery life MASSIVELY improved with this rom. I went from getting 12 hours on standby with the stock rom, to 48 hours of light usage with the custom rom. However, after I installed all my apps, and I only have about 10, the battery drain came back. None of the apps I use are active background processes, and I even installed Greenify to Hibernate any running apps. I have WiFi/GPS/Bluetooth/Sync turned off. I don't understand why I am getting 48 hours of battery without my apps, and only 12 hours of battery with my apps installed even though none are running. According to the battery stats, it is "Phone Idle" which is taking all the battery, none of the apps are even listed on there.
Any ideas why this is?