Ok so I've charged this up to 100%. And put the brightness on half (8 clicks/50%). Battery estimates 5h40 at 90%, and all I'm doing is light web surfing. Kind of disappointed with the battery life and having to use this brightness. Makes me think of backing up my mac, returning it, buying the 2015 model, and restoring the backup. Then again, I love everything else about it. So I'm going to have to weigh up the options. The thing I'm most worried about, is if the battery is like this now. I can't imagine the battery life after months or years of use when the battery starts degrading. Previously tested, I get around 3 hours of battery on a brightness I find acceptable (12 clicks / 75%). I'm not really happy about this. Anyone feeling like the battery life is bad? According to the Apple website they are using 12 clicks of brightness (75%) and getting 10 hours of battery life: I should note I've got the upgraded CPU, 16GB RAM, and 512 SSD. But I didn't think the battery life would change so dramatically, as the CPU TDP is 15W like the base model. Only the ram could be effecting it as it's double, but I never thought it would cause a dramatic difference.