Mac newb here (RMBP, 16GB, 256GB, 2.3GHz) I am reading the RMBP should have up to 7hr of battery life. I understand this could be possible with low brightness and lightweight duties, etc. Reality for me ~feels significantly less, even with light duty browsing, email, etc., my gut tells me I am seeing more like 3 hours, but I have no facts to back that up. Brightness at 50%, chassis is barely warm when I am using the machine. Are there any battery life apps out there that will clock up-time between full charges? And then, what might e the primary consumers - like a few Android battery apps i have seen. I do have iStat Pro running, but this does not provide such a feature. Any suggestions, I am just curious. I may be way off on my estimate, but I started off fully charged last night around 6pm, poked around email & web a bit, in a few separate, short-ish sessions. Right now, on first look this morning, I am already back to 34%. Hmm, expected better. But, again, I may just not be fully accounting for actual time.