The original Fairbuds XL battery has a lot going for it. With over up to 30 hours of listening time, it reliably keeps up with your longest playlist. It's designed to last >500 charging cycles and when the time comes, you can easily replace it yourself. So you can keep on listening for as long as you want, and hold onto your headphones for even longer.
You can also use it as a spare battery. Just in case you're on the go or on vacation and you've run out of juice. Double your battery-life with ease. It's a win-win.