Apple India — iphone 7 plus battery issue

Address: 560066

I am purchased iphone 7 plus 128gb silver on 21/10/2016.
And the imei no. [protected].

I am having issues with the battery.. It's not coming more than 4/5 hours.
My brother purchased same model 256gb earlier than me.. But he is getting good battery life.. And i tried all ways by resetting and all..

Kindly help me out.

Thanks and regards

Sreekanth reddy b
[protected]