Mophie Juice Pack Pro iPhone 4/4S BlackCompatibility: iPhone 4 / 4SBattery Size: 2500 mAhWarranty: 1 year warrantyWith the largest battery ever built into a juice pack case, complimented by a belt clip and rugged good looks and protection, the juice pack PRO is the perfect adventure companion.The juice pack PRO provides you with the confidence that your iPhone can lead you through the most demanding conditions. With the largest battery ever built into a juice pack case, complimented by a belt clip and rugged good looks, the juice pack PRO is the perfect adventure companion. Stay off the grid all weekend.With an impact resistant design that exceeds military specifications (MIL-STD 810G), a large battery and an included belt clip to keep it securely on your hip, you can be assured that no matter how extreme your weekend gets your iPhone will still be there when you need to get back to civilization.Added features for ease of useThe juice pack PRO is full of features that were designed with you in mind. An included standby switch allows you to choose when you want your juice pack to charge and the included micro USB cable allows you to charge and sync to iTunes.Four LEDs on the bottom keep tabs on how much power is left in the juice pack PRO battery while the rubberized outer cover and integrated screen protector enables water-tight protection.Specifications:Product Dimensions: 5.26" x 2.78" x 1.02"; 2.5 ozBattery Capacity: 2500 mAhIncluded: mophie juice pack PRO, Belt-clip, USB-micro cable, User's ManualNote: mophie cannot guarantee that you will receive more than double the battery life. The amount of additional battery you will receive depends on a variety of factors that are different for every userCheck out all of the Mophie gear in stock here.