Why does battery drain faster since sierra

[iMore Question]

Hi All
Since I updated to Sierra my battery drains WAY faster than before. Even though I have no exact times, Since the update a week ago, I always run low and twice already my macbook pro shut down. In the 18month before this happened ones.
I worked this morning for maybe an hour with lightroom and after that playing musik for 3 hours or so the battery was gone!!

 

[Just_Me_D]

Just give the computer time to adjust to the new OS.