The iPhone 6 and iPhone 6s are a lot of things. They’re sleek, they’re fast, and they’re easily among the best smartphones in the world. One thing they are not, however, is class-leaders in terms of battery life. But don’t worry, there’s an app for that. OK fine, there’s no app for that… but there is a simple accessory that will triple your iPhone’s battery life, and it’s on sale for 26% off on Amazon right now.

The PowerCase3000 Rechargeable Battery Case for the iPhone 6 and iPhone 6s packs a 3,000 mAh battery into a case that adds a minimal amount of bulk. With the battery case on, the iPhone measures just a half-inch wide, so it’s still very manageable even with one hand. It also has a crazy 4.8-star rating on Amazon, and you can get one on sale from now through October 10th.

POWERCASE3000 Apple Certified 3000 mAh Slim Rechargeable Battery Case for iPhone 6, $51.68 with free Prime shipping