The iPhone 7 Plus has fantastic battery life. It’s easily among the best in the business when it comes to longevity, but there’s obviously always room for improvement. It’s also a pretty big phone though, so you don’t want to add too much bulk, even if it is in the name of extending your time between charges. The Sunwell iPhone 7 Plus Battery Case claims to be the thinnest 7 Plus battery case in the world. At the very least, it’s the thinnest case we’ve ever seen. It still manages to pack a 4,000 mAh battery that will more than double your iPhone’s battery life, and it costs less than $40 right now on Amazon.

Here are the highlights from the product listing:

  1. ## MAGNATIC SUCTION FUNCTION: SUNWELL iPhone 7 plus/6S plus/6 plus battery case can magnetic car mount holder, and also the battery case can standard himself to Liberate your hands when you watch movies.
  2. ## 1.2 TIMES BATTERY LIFE: SUNWELL iPhone 7 plus/6S plus/6 plus Case Battery with built-in lithium polymer , it can simultaneously for increased 17 hours Talk time, 12 hours internet, 12 hours web , 7 hours games. Super Ultra Slim Fashion design without excessive bulk.
  3. ## FOUR LIGHTS SHOW EXACTLY POWER LEFT: With the smart battery case on, when you click the bottom, there are 4 lights to show exactly how much charge you have left.
  4. ## SYNC TRANSFER: SUNWELL iPhone 7 plus/6S plus/6 plus battery case works with original APPLE light port , sync and transfer can be worked at the same time without moving battery case. It is compatible with all iOS versions including updates and Apple Pay etc.
  5. ## 90 DAYS FREE RETURN: If you are not satisfied with our iPhone 7 plus/6S plus/6 plus battery case or service, Please contact with us and you will be offered a full refund or replacement, Enjoy this absolutely RISK FREE purchase by clicking the yellow Add to Cart button.

Follow @BGRDeals on Twitter to keep up with the latest and greatest deals we find around the web.

To learn more about our sponsored deals and sponsored posts opportunities, please email sponsored@bgr.com

BGR Deals content is independent of Editorial and Advertising, and BGR may receive a commission on purchases made through our posts.