Apple store battery replace

The good news is that Apple does not consider your iPod either vintage or obsolete, so they will indeed replace the battery for you.

You can get an estimate for the cost yourself under their support pages here.

iPod Repair and Service - Apple Support

Here's what comes up as of the date of this post.

==== Your estimated cost ====

We’ll check your service coverage to determine the final service fee.

$79

Got an AppleCare plan?

If available, use your applicable AppleCare plan benefits with this fee:

$0

This is for the US; if you're in another country your cost may vary, but otherwise you're looking at about $80 for the replacement. A local repair shop can undoubtedly do it cheaper if you're open to that.

iFixit doesn't have a guide for do-it-yourself battery replacement; in my experience they tend not to create guides for parts that are soldered in, as the battery for your iPod is. The question of why there isn't a battery guide has come up before; here's a question that addresses that.

SOLVED: Battery removal is never mentioned - iPod Touch 7th Generation - iFixit

You can, however, buy a battery from iFixit should you choose to attempt this on your own.

iPod Touch (6th and 7th Gen) Battery: Replacement Part

There are plenty of YouTube videos available to show you how to do that job; this one is pretty good.

Ipod Touch 7th Gen Battery Replacement in 2023 - YouTube

The only criticism I have of this guide is that they don't take the extra step of replacing the battery adhesive. Although the old adhesives strips might be fine, if it was me I'd scrape them off and use new ones. Other than that, it gives you all the information you need.