Apple AirPods with Charging Case-1 headphone a bit broken

Gen 1, original. Wireless earbuds. Charging case included. Connections: AirPods: Bluetooth. Right earbud is not working great, only play for around 3 minutes and disconnects, after you put it in case and immediately return, it works for another 3 mins. If you are fixing technology, it would be a great purchase. Charging Case: Lightning connector(not included) Good sound quality, cleaned. Case is showing usage only inside (photo attached) not influencing charging and sound. Microphone is also in perfect condition.