Has anyone tried charging the Switch to 100% on the Switch OS, then changing to Linux and charging it a 100% there too? Maybe the Switch OS really does a 100% Soft Shutoff way before the battery charging circuit itself would do.
I appreciate your suggestions; however, if you comb through this thread you can see what has already been tried and this one has been done several times. Also, this method is backwards, realistically you would want to drain the battery in Linux since Horizon shuts down before battery reaches Zero. Then you can charge to 100% outside of RCM in theory. This process is hard on the battery, and unlike Nintendo, I don't want to recommend this to people.