The Surface Pro 4 and Surface Book from Microsoft have a lot going for them, but new hardware does not come without new bugs. One of the biggest is the occasional inability of both devices to go into deep sleep states and stay there. Some device events can wake the Surface when in standby causing the processor to ramp up, create heat and drain the battery.
Microsoft is working on a solution reportedly aimed for early next year, and you can read the details here. Until then, here is what you can do to as a temporary workaround and what Microsoft recommends. (It should be mentioned that this tip works for the Surface Pro 3 too for users also experiencing battery drainage).
Full story from the WindowsCentral blog...