Mophie Juice Pack for Samsung Galaxy S4 (Certified Refurbished) When life gets busy, you need your phone to keep up. The juice pack made for Galaxy S4 provides enough charge to get you through any busy day at the office or night on the town. Flip the switch when you need a charge and forget about searching for a power outlet in the middle of your day. housands of engineering hours and meticulous testing have resulted in mophie creating the highest battery density, most efficient power management solutions available today. The juice pack made for Galaxy S4 is no exception. Designed to keep your phone fully protected and providing up to 80% extra battery, this juice pack is slim enough to easily fit into any pocket or handbag The juice pack was designed with ease of use in mind. A standby switch lets you charge your phone only when you need it. Recharge both devices simultaneously by connecting your juice pack and phone to any USB wall plug. Connect to a computer to charge, sync and download photos and other files. Dimensions: 2.92 x 5.91 x 0.66 (inches) , Weight: 3.20 oz null