Safari 10 Battery problem.

I own a macbook pro retina 15' mid 2014, after upgrading to macOS Sierra i noticed that using safari, instead of the usual 7:30/8 hours of youtube videos (or any other streaming services), my MBP lasts not more than 4:30/5 hours. Furthermore, the battery seems to be worst overall (however not as bad as safari).

Anyone else had the same experience, or any solution?