Give your smartphone an extra boost with the mophie Galaxy S8 juice pack. Incredibly, this case offers enough juice to power your device for an additional 33 hours. The juice pack remains slim and sleek to only add to the functionality of your Galaxy S8. It adds minimal bulk and also retains top features such as wireless charging. It also works with magnetic mounts. The mophie line of accessories include a car mount, desk mount, wireless charging pad, and more. However, you can also use the juice pack anywhere thanks to the universal design. Additionally, the juice pack sports Priority+ fast charging. With this, you can plug in both the case and your smartphone and the power source charges your device first.