the internals such as the motherboard may be messed up, and since they are impossible to repair, id recommend buying a replacement airpod from ebay
https://www.ebay.com/itm/164164025653?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A182pGzD8ITgawr2vwV5Xgkg94&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=164164025653&targetid=1583904486362&device=c&mktype=&googleloc=9031256&poi=&campaignid=15275224983&mkgroupid=131097072938&rlsatarget=pla-1583904486362&abcId=9300697&merchantid=6296724&gclid=CjwKCAiAs8acBhA1EiwAgRFdw1cd_jzonrK9kH3f6WUKFNIhBR4LHk0fZkJWqUkDNllshApceg6qQBoCgb0QAvD_BwE