Battery life on my MBA 2015 13" seems to be too short

[edenbensal]

Hello
I've bought a month ago a new MacBook Air early 2015 13" in Thailand. I'm using him mostly for browsing and watching videos on YouTube. According to the specifications of the battery it's should be working discharge for 12 hours. I feel that the battery goes down too fast. How can I check if the battery drains normal or its needs to be repaired.
I've downloaded coconut battery app and it's says that the battery status is normal.

 

[Willo34]

Try one of these options:
http://www.makeuseof.com/tag/reset-macs-smc-pram/

 

[T'hain Esh Kelch]

The 12 hour battery time is using specific settings and doing specific things. What do you use the machine for?

 

[organic bond]

You can check this out, http://www.macworld.com/article/2926932/battery-life-go-all-day-with-any-apples-mac-laptops.html, and see how your machine compares to those results. I was able to reproduce the movie playback, that is 12 hours. Sound and keyboard light levels are not specified though.