10-15-2022, 07:16 AM
It's possible, but with major caveats due to some troublesome corner cases. This is effectively what the secondary battery in the keyboard case does, but there are warnings not to use the phone's USB connector at the same time as the keyboard case if you want to be certain of avoiding damage.. Schematics for the phone and the keyboard case charger board should be linked in the wiki. I don't remember whether the corner cases were detailed in a forum or blog post, but you should be able to find it and see whether or not your use case would work safely.