jasmine26,
Thanks for following up with us, and for providing those additional details.
It sounds like the issue only happens with one AirPod, is that right? If so, which one is affected (left or right)?
Does the battery percentage ever appear to fluctuate when you view it via the battery widget on your iOS device, or does it always show 96% or 97%?
If the issue is only happening with one AirPod, it's possible that the issue may be hardware related, but we'd like to rule out other possible causes first.
Just to confirm, since noticing this issue, have you had a chance to try cleaning your AirPods and their charging case? If not, we'd suggest cleaning the AirPods and charging case to help ensure dust or debris isn't affecting charging.
This page has some great information on cleaning your AirPods:
How to clean your AirPods and EarPods
Thanks!