yes 9 hours you get outside when the brightness is much higher and 10-11 when indoors
That's what the non TB model is getting with light usage, so it can't be possible to achieve with the one with TB.
- 10% smaller battery
- 28W CPU vs. 15W although the difference want be that big during light usage when CPU is between idle and like 20%.
- a Retina Touch Bar to power
- a small ARM chip to power
- another Alpine Ridge controller
Each of those things isn't that significant, but combined it will take a hit on the battery life.
- 1h less for smaller battery
(following numbers are mostly pulled out of thin air and should be seen as an example)
- 1h less for higher wattage CPU, even during low usage
- 0.5h less for powering another smaller Retina display
- 0.5h less for ARM chip, Alpine Ridge and other added components with at least passive power draw
Those numbers are only a guess, but a very conservative one which would explain at least 3h less battery life.