He got over 12 hours at 50%. That's great battery life no matter how old or new the machine is. I'm seeing about 8-9 hours on mine mostly doing coding. It's a big bump from my old MBP retina which was doing 5-6 hours with a brand new battery. Obviously I don't have charts to back this up I'm getting way more battery power out of this new Mac.A bad test since the other MBP is around 3 years old.