A simple suggestion to the Surface engineers from an IT Admin and Repair Tech since 1986.
1. Take the previous firmware update BEFORE the LGC Battery issues started. Update the date/time/version ID on it.
2. Find a way for Windows Update to ID the Surface Pro 3 that have the LGC Battery (Don't want to break the Simplo equipped units again).
3. If a Surface Pro 3 with LGC battery is identified via Windows Update then reissue the last working firmware with the new date/time/id stamp previous Firmware.
4. Let the Surface Pro 3 LGC users get on with their lives until/unless the MS Surface team can actually fix the issue in a properly regression tested Firmware to be released some time in the future.
MS Leaving a significant portion of their SP3 customers twisting in the wind will NOT keep them as future customers.
I have 5 LGC Battery based Surface Pro 3 units (All Win 10 Pro TH2/RS1) stacked up on a workbench due to this. I expect to receive more.
I am actively replacing ALL Surface Pro 3 tablets now will the Lenovo ThinkPad Yoga 14 (20FY0002US). It is about 1.2 Lbs heavier but every user who has received one like it better than the Surface Pro 3 (More ports, Dual GPU - Intel
/NVidia 940m, built in rechargeable stylus) and a real ThinkPad keyboard. And you can open it up to access Ram, SSD, AND Battery if necessary.
A Tablet/Ultra-book is USELESS if it has to be tethered to the Wall to function. :-(
The ThinkPad Yoga 14 (20FY0002US)
is also cheaper at $900 too. No extra accessories required to use it.