Got a problem with my right airpod pro in that it doesn't seem to hold charge when sitting in the case. It will charge up to 100% in the case, but if left (in the case) for a few hours it will burn down to 0% while the left one sits at 100%. If I then remove it from the case and put back in it seems to jump to high percentage very quickly then repeats over a few hours. It will also work fine playing music for hours when actually in use. Very odd!
Does that sound like a battery fault or a case charging fault? Only a couple of weeks old.
if it’s less then 30 days I would press the place of purchase to replace the entire unit under your rights.
The issue you’ve described is a tricky one to diagnose - the case is just a battery really so shouldn’t be able to cause these issues so I would look to replace the AirPod first if I were in store but they’re horrible things to diagnose with such an issue