Why is my headphone's battery finishes fast and it has a rattling soun

Hi

You battery may finish fast because it may need replacing,battery’s are most of the time the first thing to go in electronic devices

And the noise you are hearing roils be a verified things…

It could be a loose screw,you can tighten the screws by removing the ear pads

Or it could be a that one of your speakers in the headphones is damaged

I would definitely check the screws before assuming it’s the speaker as if it was a speaker it would make a more crunchy distortion noise

Hopefully this helps

Any questions please ask

Thanks:-)