There are a lot of complaints about the buds not charging in the case, most likely due to not making full contact with the charging pins. The buds have no auto-sleep feature for some reason, so they'll stay connected until the battery runs out.

Not only is this annoying, it also adds tons of unnecessary full discharge cycles.

The new wireless charging cases are also bad - they seem to stay warm even when no longer charging, which probably degrades the batteries as well.