I charged my case with the earbuds inside even though my earbuds can still be used

While I using it in public, I noticed that my case was blinking red indicating that it needs to be charged right away. So I went home and decided to do that with the earbuds inside the case. But, I realized the earbuds itself can still be used anyway because it still has battery. Will this situation damage my product or it would be fine to do so?