If you're finding that your soundcore C40i  stays connected after being placed in the case, you can try the following suggestions to fix them. 

1. Inspect the charging pins in the case to see if they are recessed. If so, apply a small amount of alcohol and gently poke the pins with a toothpick or tweezers. Once the pins pop out, immediately and thoroughly wipe the area dry.

2. Ensure there is no dirt on the earbuds' pins or the surface of the charging case. If it's dirty, clean the area using alcohol and a cotton swab.

3. Confirm that the ear grips are correctly installed.

If you have any more issues or your issue has not been resolved, please contact us for further assistance.