> for a reasonable price

Sorry, excuse me while I go burst my sides from laughter. Apple does battery replacements for more than a (entry-level, admittedly) new phone costs. And that new phone includes a battery. ;)

Moreover, Apple refuses to do battery repairs if your phone has other problems, even if those problems have absolutely no relation to the battery, like... a cracked screen. (I'm not kidding, but hey, props to them for actually being honest[1] for a change. That's a refreshing surprise.) Personally, I know very few people with Apple phones over a year or two old who don't have a cracked screen.

[1] https://support.apple.com/iphone/repair/service/battery-powe...