Why is my AirPods Pro case draining so fast after a full charge?

I updated my phone this past weekend and got a set of AirPod pros in a bundle. The case itself died overnight, which is understandable since I hadn’t charged it. When I got to work tonight I plugged it in to charge for two hours and it said 100% when I connected to my phone. Less than three hours later, after using one AirPod to listen to music while working, the case is at 5%.

[Re-Titled by Moderator]