External Backup Battery Charger Case Cover For Apple iPhone 4 4S 1900mAh Black USA Seller Product DescriptionThis product is with PVC+ABS material, 1800mAh power capacity, it keeps iPhone connector, no need for unlock or jailbreak, easy to operate, suitable for iPhone 4 and iPhone 4S.Features:Stylish and exquisite appearance design, piano body coated PVC & ABS.High performance in charging: 1800mAh power capacity available.Keeping iPhone connector, it can charge for iPhone and the battery case at the same time.No need for unlock or jailbreak, plug and play.Easy and convenient to operate, it is suitable for iPhone 4 and iPhone 4S.Specifications:Color: BlackMaterial: PVC+ABSApplicable scope: iPhone 4, iPhone 4SBattery capacity: 1800mAhOutput voltage: DC 5V±0.1VOutput current: ≤700mA（0.7A）Input voltage: DC 5V±0.2VInput current: ≤500mA（0.5A）Charging time: 3-5 hoursStandby time: 420 hoursOperating temperature: -10℃--50℃Storage temperature: -20℃--65℃Item weight: 63gPackage weight: 124gItem size: 12.4 * 5.9 * 1.5cmPackage size: 17 * 9.8 * 2.8cm