Repair and disassembly information for the first generation of Apple's high-end wireless earbuds. Released in October 2019. Identified by model numbers A2084 (left earbud), A2083 (right earbud), and A2190 (charging case).
The battery may be very old and need replacement, which is almost impossible to do. Luckily, there are many stores online, including Apple that will sell you a refurbished or replacement AirPod.