When Microsoft announced the Surface Book last year, it was the most powerful thin laptop on the market. Forget the detachable screen, Microsoft managed to fit a discrete graphics card in something thinner than a 13-inch MacBook Pro.

This year, things are getting better. Microsoft has left the outside of the Surface Book the same, but it’s “doubled” the graphics capability and added a bunch more battery.

DON’T MISS: From the outside, nothing is different with the Surface Book gen 2. It’s the same detachable screen, all-aluminum design with that weird hinge. But inside, it looks like Microsoft has added a new GPU. It’s not an off-the-shelf unit — nothing is thin enough to fit inside the Surface Book — but discrete graphics of any kind is a big step up.

Microsoft also claims that it’s added 30 percent more battery life. Hopefully, it hasn’t done a Samsung and bitten off more than it can chew.

The new Surface Book with extra graphics arrives this month for $2,400, while the lower-spec, no-GPU version with a Core i5 remains $1,500.