Battery issues in new iPod Touch 7th Gen

Hi

When you say the service centre I am assuming you are talking about apple support/apple store

There are lots of good ways to extend they battery life of your iPod touch such as

Closing apple that are running in the background

Turing down your brightness

Turing your Bluetooth off when not in use

Turning off background app refresh

If the above doesn’t help and apple isn’t doing anything else you could replace the battery but that would void your warranty and it’s not a easy task

I would go to apple again before we do any repairs ourselves as we want to keep our warranty intact

Hopefully this helps

Any questions please ask

Thanks:-)