BXT&reg; New iPhone 5 4500mAh Power Bank External Rechargable Back Up Battery Charging Charger Case / Cover (With Media Kick Stand) Advance 4500mAh Lithium Polymer Back up battery for iPhone 5 Standby Time: Up to 210hrs Talk Time: Up to 8h on 3G/ Up to 16h on 2G Audio Playback : Up to 28hrs Weight: 166.9g