The Surface Pro 3 is by far the worst battery powered computing device that I have ever had. Every time that I pick it up, the battery is depleted and it needs to be charged. It doesn't matter if the SP3 has just been laying around doing nothing since last it was charged, the battery is empty! And this is my second SP3 since I broke the screen on the earlier one and the insurance payed me a new one. The other one was just as bad... every time I picked it up, the first thing I had to do was charge it. I ran the powercfg with the /batteryreport, /sleepstudy, and /energy switches, but those files do not tell me much. Some error is reported, "CPU Utilizationrocessor utilization is high", but it doesn't tell me anything but that CPU utilization is high. Brilliant! No, I find that I use the SP3 less and less, since I have to charge it every time I pick it up. I can just as well use my mobile to surf the web, FB, whatever, that one happily runs on battery for a whole day and more, no problem. Maybe Android manages power better than W10... Thanks for listening.