Don't underestimate the lengths the Genius Bar will go to keep your computer happy. Especially if you have AppleCare, which you can still buy if you got the mac

Don't underestimate the lengths the Genius Bar will go to keep your computer happy. Especially if you have AppleCare, which you can still buy if you got the machine less than a year ago. But even without AppleCare, their repair prices have been getting ridiculously low, so I wouldn't assume a battery replacement will be off the table.