I have an iPad Pro that had battery issues, and Apple replaced it toward the end of the 1-year warranty. They also said that if it happened again (outside the 90-day warranty that comes with all replacements), they would swap the entire device for me for the price of a battery replacement ($100). While this seems inconvenient, it actually makes it very easy to swap batteries. The price is not great, but considering the cost of an iPad Pro (closing in on $1,000, depending on size/storage), it's not a bad deal. Plus, you're not just getting a new battery — everything is new, and there's a 90-day warranty on everything.