I purchased these headphones new at a flea market about two years ago and used them regularly for about six months. After that, I've only used them a handful of times, but I've been careful not to over-discharge them, so I've been charging them regularly. I haven't noticed any issues with charging, Bluetooth connectivity, ANC, or other functions. When checking the battery for this listing, I connected them to a PC via SBC with ANC on and played at a low volume (about two notches up from mute on a smartphone) for two hours, and the battery was at 80% remaining. Since the app isn't supported and I'm reading the battery level from Windows, there might be some error, but I estimate that the battery will last for 4-6 hours before the low battery announcement (around 20% or less) comes on (the official claim is 7.5 hours with ANC on to 0%). This is a simple check, so I don't guarantee long-term use, but I hope it's helpful as a reference. Contents: * Earphone unit + charging case * Spare ear tips (unopened S and L?) * Charging cable * Instruction manual, etc. * Original box (will be disassembled for shipping. It's not glued, so it can be reassembled) The M-size ear tips attached to the earphones have been disinfected with alcohol but are used. The original box has some damage. I don't see any major scratches on the earphones, but there may be some minor dirt or scratches that I haven't noticed. It may be difficult to see in the photos, but the case exterior has scratches and small marks overall, indicating it's a used item. I've disinfected them with alcohol, but please forgive any small dust or dirt that may have gotten in the small gaps or during packaging. Please consider this a used item that has been handled by another person before purchasing. Due to the ease of swapping items, I would appreciate it if you could refrain from returns. I plan to ship the earphones in the charging case + the included sponge and other accessories in a separate box, protected with cushioning material, and ship them via Yu-Packet Post in a thin cardboard box. I may use recycled packaging materials.