Welp, left side on my MT might be done. For past 3 days I have been trying to charge. Red light turns on for about 10 secs then turns off. If I try to use it regardless of whether it's after 15 minutes on charge or next afternoon, it's at 2% battery. Says "battery very low" then turns off in 5 minutes. I tried alcohol swipe to clean, tried re-pairing the connection, fully charged the case even though it already had 3 bars charged.. I don't have anything else I could try.
I'm going to contact CA tonight. Hopefully, they allow RMA, and I'm selling the new ones they send me. It's pretty much either luck of the draw or perhaps TWS mode is better (my phone is Pixel 3 without TWS mode). It could certainly be a good set on the 3rd attempt, but I don't want to push my luck.
I was hoping I could push it back to black Friday. I don't have another pair of TWS though. I guess it's time to begin searching for new TWS..