Is the battery life better on new machines? Or is it just that my needs take little toll on the rMB battery. I've had the machine on since 7am EST and it is now 2pm and I am at 46 percent. Writing and now then web research. One day into it I am already adjusting to the keyboard, but I almost adjust to keyboards quickly, and I was not crazy about the keyboard on my late 2012 old AIR. It had lost the spring in its step long ago.