OP
Here's the latest, showing nothing visibly causing drain, yet massive drain during the ~4:00 hours of connected standby before auto-hibernate.
BTW here is a statement from an MS MVP on the power states...the SP3 is SUPPOSED to go into hibernation after 4 hours of connected standby (hibernation isn't an "active" state so you shouldn't see anything in sleep study past the 4 hour connected standby period).
http://forum.tabletpcreview.com/microsoft/62921-surface-pro-3-problems-thread-58.html#post406132
Very unusual that you were able to have a connected standby session over 4 hours on battery? Have you disabled CS by enabling Hyper-V by chance? I realize the sleepstudy screenshot you posted does say "Connected Standby" session, but I'm not sure if that's definitive.
Quick question, does the Intel XTU Utility install any TSR or Driver?
That does bring up a possibility I looked at another users sleep study and saw many DHCP requests during Connected StandbyI'm unsure, but I just did a complete system wipe (included the full SSD wipe) and reset, and am ONLY installing the Microsoft updates/firmware through windows update, then will leave in connected standby and report back. Only thing I can think is remaining is if my router's wifi has super high power drain to the device, not sure if that's possible? I do know when I put the machine in airplane mode previously before putting it in standby, I did get much less drain (<4%) over 4 hours...granted that defeats the purpose of "connected" standby.
That does bring up a possibility I looked at another users sleep study and saw many DHCP requests during Connected Standby