I don't know how but it happened. I watched London has Fallen and half of Troy's movie. Rented those from the iTunes, HD standard. Downloaded them to my MBP. I started watching at 17:10 and stopped at 20:15. 85% left. I closed all apps except for iTunes, 50% brightness (was on a bus), 0% keyboard light, 90% volume and used the ear pods that come with iPhone 6S. I gotta say the update is amazing. Pre update, watching movies like this would eat my batteries at 10%/hour (roughly 10 hours total). Now seems like my MBP is the better companion for long travels than my iPad Air 2 . My model is nTB, I heard the update also fixes the battery issue for other models. Thoughts?