In my previous posts, i recommended du battery saver to check battery drain issues. But i found something that its so called aurora engine (advanced saving in pro version) that closes 'background apps' is of no use and it actually increases battery consumption by frequent closing and restarting apps on non rooted phones.
Its just an ordinary task killer, which should be avoided. Task killers and ram cleaners/optimizers are of no use.
So, the only best battery saving app far remains greenify (root) and best optimizer remains cleanmaster.
@yawar538
Updates
I hope you are not using any battery saver, ram optimizer or task killer in your phone.