Mi4 is one of the best phone . it give filling of iphone
The mi 4 have power battery 3080mAh. I am also use this phone last two month and battery backup is nice .
Phone have little heating ploblem duaring charging.
But over all perormance is nice.
In this range lenovo k4note is also good phone.
You think to buy phone under 12000?-15000 this
Two phone are very good. Both phone are good
But my opinion is
Mi4