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.