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 to avoid over-discharging 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 may 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 body + 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. There are no 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 nature of the item, which is easily swapped, returns are not accepted. The earphones in the charging case + the included sponge, and other box contents will be separated and protected with cushioning material, and shipped via Yu-Packet Post in a thin cardboard box. Recycled packaging materials may be used.