How do I diagnose the yelllow triangle symbol over my battery on Windows 11?

I've got a Lenovo X1 Extreme Gen 3 and, even when using the official chargers, I always get this warning triangle over the battery logo. I've updated drivers and Windows is up to date. Even tried the Lenovo support but they're not being any help. Is there a log somewhere that can tell me why this is flagging up?

Question by joedborg on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.