Most people buy laptops because, unlike desktop computers, you can take them anywhere you go. But, all of that convenience flies out the door when your battery is underperforming, because you're forced to keep your computer tethered to the wall with a charger anytime you want to use it. If you're a Mac user with a lackluster battery, I have some good news for you: Apple might replace it for free.
If your Mac laptop uses a non-removable battery and is still covered by the one year warranty or an AppleCare plan, Apple will replace the battery for free as long as it no longer holds 80% of its original charge. iPhones, iPads and Apple Watches have similar protections under the updated AppleCare+ Protection Plan.
Apple's old policy only covered the replacement of defective batteries.
Laptops with built-in batteries include all MacBook Airs and MacBook Pros with Retina Display. Also included are 13-inch MacBook Pros from mid-2009 and later, 15-inch MacBook Pros from mid-2009 and later, and 13-inch MacBooks from late-2009 and later.