thanksThey did, i have a clasic mbp that last around 3-4 hours and brand new in 2011 it last me around 6 hours
I also had the2013 late mbp that last me no more then 7 hours, and now the 2017 last me 9h and if i put my brightness at around 60% (wich translate in 75% level of last gen) i get 10h and 15 min. Everything here is in light usage and 15" models
So from 6h to 10h in 3 generations is not a battery life increase?