Apple just allowed me to return my Maxes almost two months after I had bought them because of the battery drain while in the case. They first did a return and replacement, but then allowed me to return the replacement -- which was no better -- for a full refund.
They admitted that battery drain when not in use is a known issue for which there is currently no fix. Resetting, etc., does not make any difference.
What is unclear -- to me, at least -- is whether this affects everyone, or just some AP Maxes. The latest firmware update may have made this worse. But there are numerous reports of the drainage problem going back a long way.
I loved the AP Max in other respects. But I am quite pleased with my new Bose QuietComfort SC that I just bought on sale at Costco for about $225 as a replacement. I don’t think the sound and ANC are quite as good. But they are pretty good. And the Bose is a lot easier for travel because of its light weight and collapsible design. Plus it has an on/off switch!