Galaxy S4 gets tired very quickly... VERY QUICKLY... Please help me!?

[541]

Power Saving mode and disabling other battery-consuming features such as GPS also DOESN'T HELP... NOT EVEN A BIT. I've also tweaked the Sync settings of Facebook n such... still no better... The battery was around 90% around 11:30 am, n without doing anything on the phone (with power saving mode enabled) it drained to 77% till 2 pm. Then i browsed a bit on the net for about 10 minutes and the battery drained to 73% Then after about half and hour, the battery was 69% (on idle and power saving mode disabled) And then i put my phone on charging and started playing a game while charging, the battery remained constant for a while, then when I increased the brightness of the screen- the battery started decreasing, even it was on charging! When first I'd bought the phone when i used to play and put my on charging simultaneously, the battery didn't use to decrease as it'd happening now. Well one thing I did to my phone- which I think is causing this problem- I changed Window animation to 0.5x in Developer's Option for increasing the speed of the phone (yes, my phone was kind of lagging while I used to check the Apps, just when i used to slide it would lag; u getting what I'm saying?)... then after sometime i changed the window animation to "Off", did that effect my phone? PLEASE NEED HELP!!!!

[Daimler]

I dont have s4 but I do have s3, im also have this feeling that power saving mode aint working. Try this, lower your screen brightness while your power saving is on. If it does not work, try going to the Samsung Branch and ask them if there is something wrong with the batteries or maybe the game your playing is a battery consumer