upgrade to USB-C charging port

Just to add my $0.02 worth here, there is a vast difference in the signals between a micro USB port and a USB-C port. They even require different USB controllers to drive them and do not have any commonality in their printed circuit board footprint - meaning there is no USB-C port you can buy that can be soldered on in place of a micro USB port. Even if you could, lacking the extra USB-C signals, you'd end up with a USB-C port that only has the same capabilities as a micro USB port; you wouldn't be adding anything in terms of functionality or speed.

@dadibrokeit that's right. The only thing those ports have in common is the wording USB. Different animals altogether and different architecture needed to accomodate it.

See, I thought I had made it clear that I wasn't planning on just soldering on a USB-C port.

I want to add a whole USB-C charging PCB piece. Like make the USB-C charge the battery, but leave everything else where it is.

@korokinopio What you're proposing would be difficult. You would have to bypass the built-in charging circuitry for the battery in order to substitute your add-in USB-C charging circuit. Do you have schematics for the motherboard? Hard to say what effect that would have on the existing charging system since the battery's charging percentage is undoubtedly tied in to that system. Could an add-in board work in parallel with the existing system? Possibly, but hard to be sure especially without examining the circuit diagrams.

It's an interesting proposal, but there are an uncomfortable amount of unknowns involved. Do you have a specific add-in board in mind already?

@korokinopio oh no, you did make yourself plenty clear. The issue here is that this is an almost impossible task. You do not have the circuitry for the type of charge and the type of data, that gets send through the USB-C connection to your tablets motherboard. If all you do is charge it through the port you could probably design a separate charge circuit, but that leaves your tablet without any way to connect anything else but a charger. you could always add a board, something like this, (example only and not an endorsement) Isolate it from your motherboard so as to not provide overvoltage to that and connect your battery. The importance here is to isolate it so it just charges your battery.