Battery is the source of power for iPhone/iPod. Therefore， if the battery runs out of power quickly， it really casts a damp over users. However， keeping an extra battery enables you to enjoy endless pleasure with your iPhone/iPod and this external battery would be your best choice. The battery bears the properties of high capacity and dependable performance. It is durable， reliable and lightweight to carry， so it is worthy of your ordering. With this， you can keep contact with your friends and family anytime and anywhere. It won′t let you down.                                    Features            Portable and convenient and rapid chargeThe products suitable for listening to the broadcast program or broadcast light music， pop songs and melody softer music， sound beautiful harmony， strong appreciationElectricity-saving function， long cycle lifePowerful with long operation timeExquisite design， made of high qulity materialThis Battery is designed to fit your phone perfectlyStay connected with families and friends by getting extra battery powerThis Battery is the best replacement for the original battery with comparable standby and talk time50% battery capacity for mobile charging                                                            Specifications            Model    HV-339    <br>Battery Type    Lithium Ion    <br>Output    5V-0.85A    <br>Charging Time    4 hr    <br>Music Playing Time    3-4 hr    <br>Material    Metal / plastic    <br>Working Environment    - 10°- 40 °    Color    White    <br>Dimensions    5.8 x 5.8 x 1.6cm / 2.28" x 2.28" x 0.63" (L x W x H)    <br>Cable Length    80cm / 31.5"    <br>Capacity    1900 mAh    <br>Weight    112g / 3.95oz    <br>Compatible with    iPhone 3/4/4S/iPod Touch 2/3/4/Nano 4/5/6    <br>                                                            Package Includes            1 x 1900mAh 2 in 1 External Battery with Amplifier1 x USB Cable