Apple had said earlier that the estimated time showing near the battery percentage was not a correct, true estimate of the batter left and subsequently also removed it in MacOs Sierra 10.12.2. My question is now in Activity Monitor in the energy tab it shows estimated battery left is that a correct estimate or even that is wron according to Apple ? I saw in a new 2016 15" rMBP it showed an astonishing 10:50 hours !! was quite pleased to see it !!