Power and protection seamlessly integrated to create the ultimate case solution for your Samsung Galaxy S4. The mophie 2325 features a 2300mAh battery which provides up to 80% extra power with the flip of a switch, while the protective hard-shell case keeps your phone safe from daily wear and tear. 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.