Hello haikal33,
Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with charging one of your AirPods. If you have already followed the article at the top of the page, try the steps listed here to see if they resolve the issue: If your AirPods won’t charge - Apple Support
"If you still can’t charge your AirPods, contact Apple Support."
We hope this helps.
Cheers!