[riley_dog]

Apple will replace the battery on your iphone for $89 and your macbook for $249.

Source: https://support.apple.com/iphone/repair/battery-replacement and https://support.apple.com/mac/repair

[HomeDeLaPot]

Following the link on the Mac page, it looks like Apple will not repair a 2015 Macbook Pro:

https://support.apple.com/en-us/102772

> Obsolete: ... MacBook Pro (Retina, 13-inch, Early 2015), MacBook Pro (Retina, 15-inch, Mid 2015)...

[39896880]

>Mac laptops may be eligible for an extended battery-only repair period for up to 10 years from when the product was last distributed for sale, subject to parts availability.

[ghaff]

Probably makes sense, if you're organized enough, to get a battery swap while it's still in coverage if you'll use. My 2015 MacBook had a battery that got swollen a few years ago. Got it replaced and continue to use it as basically a browser and it's perfectly usable.