If your phone is already connected to the earbuds, and the current battery endurance of the earbuds can meet your needs when you go out, you don’t need to bring the charging case.
It is recommended that you bring the charging case when you go out. The charging case can significantly improve the battery endurance of the earbuds and ensure that they are always ready for use. Additionally, keeping the earbuds in the case when not in use reduces the risk of losing them and protects them from damage. Bringing the case also allows you to take advantage of additional features such as quick pairing and safe storage.