There is yellowing due to age. Please refer to the fourth image. The left is B rank, and the right is A rank. Functionality is normal, and there are no operational issues. The battery status was 38% remaining after watching YouTube for 4 hours. However, this may vary depending on the usage environment and conditions, so it is for reference only and not a guaranteed time. Operational warranty period: 7 days from delivery. Comes with a genuine adapter. Large stock available.