Spyder PowerShadow i5d “Apple Certified” 2100mAh Battery Case with Charge/Sync Dock for iPhone 5 & 5s (Black) View larger View larger Keep your "5" alive with the PowerShadow i5d from Spyder Digital Research. The i5d has built-in smart technology that intelligently boosts your iPhone’s power for maximum performance and reliability. Its charging options offer unsurpassed convenience, flexibility and ease of use, whether you are at home, at the office, or on the road. The charge dock, or USB port on the battery case, allows you to recharge both batteries without ever removing your iPhone from its case. And the lightweight, ultra-slim polycarbonate body, with its satin rubber finish, feels ruggedly luxurious in your hand, and easily slides into your pocket. 2 Easy Ways to Recharge Connect your mini USB cable to the battery case Slide your PowerShadow battery case into the dock View larger Features / Benefits Wired sync while leaving your iphone in the PowerShadow case8 hours of talk, 11 hours video, 44 hours of musicRetain access to all controls, inputs and portsRaised front edge to protect your screenImpact resistant polycarbonate caseCharge your phone without removing your iPhone from the battery caseWeighs less than 3 ozBattery level indicatorRecharge without removing your iPhone from the i5 caseOn/Off button lets you control the powerImpact-resistant polycarbonate body with satin rubber finishOne-year limited warranty