Hi Everyone, so I had the same issue as this submitter.
I was a little unsure what to do as I also replaced the battery back to the original bloated battery and the 1012 g1 started up, after letting me know the system didn’t know what time it was etc as the battery had been removed.
I removed the old battery again, restarted the 1012 g1 without a battery and then plugged the new battery pack in after Windows 10 had started up. The battery seemed to be charging up? Gave it a few minutes and then removed the USB-C power connector and the tablet kept working. I turned the tablet off with the power disconnected and the unit now turned back on again. I had tricked the tablet into thinking the battery was the same as the old one.
The only thing to be careful of is you need to precariously hold the screen in place with the ribbon connectors still located, remove the battery etc all with those connectors still in place.
But apart from that it was relatively painless. Hope this helps you out too?
Cheers.