Just a update on mine. I can no longer use the surface 3 pro in the docking station. it will power on and a few moments later just turn off. I can still run it off the charger that came with it, but this is a pain because now I have to get a usb hub, a usb
network adapater and a mini display port to display port cable so I can use it with my monitor and network. The dock is now useless because of this battery issue.
The problem with the dock is it does not supply sufficient power to charge the tablet and run the peripheral ports, when the tablet is utilizing a lot of CPU, such as playing a video, or booting up. Furthermore, the dock is simply not charging the battery
when the Surface is shutdown, so the catch 22 is to get the surface started up before the battery dies, long enough for the battery to start to charge, when there's insufficient charge in the battery to complete the startup process.
What I found as a workaround, was to plug the Surface into the portable power connector, then startup and log in. I then leave it to sit there while the pathetic charge level reaches over 50%, which only takes minutes. Then, shutdown and remove the cord. Immediately
transfer to the dock, with all peripherals disconnected. Startup and login, there should be just enough juice to get to a fully booted and logged in state. Don't start to use it yet. Wait for the battery to charge to over 90% and slowly add peripherals.
I dragged the battery indicator from the hidden icons tray to the start menu, so I can see it charging and the current charge level. If it drops below 30% it will simply turn off, so I limit CPU usage by closing apps I'm not using, including the system tray
apps. I also close browser tabs and avoid videos. When I do play a video, I keep an eye on the battery indicator.
It's a pain in the butt, but with a pathetic 144 mWh battery charge, I can run a mouse, keyboard and 2 displayPort monitors with WiFi. If I play videos, the battery instantly drops and begins charging, but the CPU may be drawing more power faster than the battery
can charge and the surface will shut off after too long. If the Surface fan kicks in, I need to close my apps, because the Surface is about to turn off.
I hope this helps. It's a bad situation and turned a fast boot tool into a long winded game of Russian roulette, but I have managed to get my dock to work with a dead battery.