Originally Posted by Joe_Linux
Originally the battery performance of my 5.0 was rather poor, but after I reset it to the orignal factory settings, two system upgrades came in from Samsung and that improved the battery life greatly. Also only use the apps you actually need or want. I don't use any wiidgets, and the All Aboult Android show reported that fee apps suck a lot of juice as compared to the paid apps as the advertising sucks juice. Apps like Juice Defender use more juice than they save in my opinion. Also Kaspersky anti-virus was horrible in regards to sucking juice, so I un-installed that too. I suggest dowing a foactory reset and then being very frugal in regards to the apps you reinstall.
But my main problem is really when my device is IDLE, when no apps are running.