If you have an iPhone 7 or an iPhone 8 that’s still working well, there’s no reason whatsoever to pay $800, $900, or even $1,000 or more to upgrade to a new iPhone. That said, there’s a good chance your battery doesn’t last quite as long as it used to. If you don’t want to get a low-cost battery case from the many Chinese brands out there, your best bet is definitely the Apple Smart Battery Case. Don’t pay $100 for it, though — it’s on sale right now on Amazon for just $78!

Here are the bullet points from the product page:

  • The Smart Battery Case for iPhone 7 gives you extra battery life with the look and protection of an Apple-designed case.
  • Combined with the Smart Battery Case, iPhone 7 provides up to 22 hours of battery life for browsing the web, up to 24 hours of watching HD video, and 26 hours of talk time.
  • The Smart Battery Case also works intelligently with your iPhone to charge simultaneously when you’re plugged in, so both case and iPhone will have more than enough battery life to get you through the day, and then some.
  • The soft elastomer hinge and one-piece design make it easy to put the case on and take it off. You can even connect it to any Lightning accessory, such as the Lightning Dock. And iOS 10 or later allows you to see the battery status of your iPhone 7, your Smart Battery Case, and even your Apple Watch, all in one place.

Follow @BGRDeals on Twitter to keep up with the latest and greatest deals we find around the web. Prices subject to change without notice. BGR may receive a commission on orders placed through this article.