I submitted an app which tracks the user\'s location (and sends it to the server) at some fixed intervals chosen by the user (5 min, 10 min, 30 min, 1 h). The app should work in
To resolve you have to add the disclaimer in the App description in Itunes Connect "Continued use of GPS running in the background can dramatically decrease battery life."
Sounds like apple's complaint is that your apple think that your app doesn't need to use background location. If what you're trying to do is legitimate - e.g. your user would expect the app to track them in the background and this is a useful thing to them - you could try explaining why location tracking is needed in the review notes.
I think it is best to address these questions directly to Apple. I hope you did so. They are very good at communication, providing your response is professional and clear. As are your questions.
I find it hard to believe that anyone will be able to help you here.
Edit: Add description to your app. Be clear in your messages to the user and to apple reviewers. It seems to help a lot. Remember, they are people too.