Xiaomi redmi 3s/ prime are the best flagship killer smartphones under Rs. 10, 000. The performance of this device you get no other device can give you in this price segment, and if you talk about battery it pretty awesome.
Believe me, surf the internet using jio4g whole day and I also play games on it and I only have to charge it one for my whole day work. it the best phone you can get under 10000 and it is the most value for money.