What to do with battery and speed of a phone

[mark]

Hi, I have Sony Ericssion Neo L although I am quite satisfied with the performance of phone but recently phone started working slowly and the battery drains so fast even if I keep my internet connection off . is this is the software issue or some other problem ?

please help.

 

[sanusense]

I think you should remove some apps from your set, the same thing is happening with my HTC One these days!