Moto turbo- heating issue (battery temp 46-48c)

A

AC Question

I recently purchased a moto turbo device (it was packed march 2015). Everything is good but I felt that when I do video recording my turbo gets too hot. I have done some 6-7 recordings of 15-30 mins duration @1080p . And my battery temperature was around 46-48 degree celcius.

Is that too abnormal ?
Also I have noticed that my battery drains at the rate of 1:50 mins video for 1 percent battery drop.

Please help me out.