Airpods disconnecting out of town and won't charge!

Why isn't my airpod case charging! I went out of town to go see a concert and when I got back, my case wasn't charging and I got it replaced. Last week, I went to a friend's house and they disconnected again! I don't know why this is happening and now I have to use my brothers case to charge mine. I NEED MY AIRPODS BACK!! AHHHHHH!!