Now a days their is so many mobile coming in market like xomie, mi, etc but if you are looking for device which is best in battery for music then
finally moto g4 plus is the for you I am using from
last 3 month and it is so good it has large battery
with fast charging it charge the phone within 15min
The rear camera is 16mp with laser focus and
front facing camera is 5mp .
I have use the camera in low light the camera performs very well. It come with 3gb of ram and
32gb of rom it come with Android 6 .
It come it 5.5inch screen .
So if you are looking for smart phone under 15000 then moto g4 plus be the best option for you.