When I got the first Macbook Pro Retina in 2012, I would get ~10 hours on OSX. The newest ones I can't get ~4 hours from...
I also got the first Macbook 12" and I would get better battery life running Windows 10 than I would OSX. Windows 10 I would get ~12 hours or so. Windows 10 on the Macbook Pro drained the battery quickly though because you couldn't switch to integrated graphics.
I also got the first Macbook 12" and I would get better battery life running Windows 10 than I would OSX. Windows 10 I would get ~12 hours or so. Windows 10 on the Macbook Pro drained the battery quickly though because you couldn't switch to integrated graphics.