Welcome to our website， we are glad to give you a recommendation of this QX-188 4200mAh Universal Mobile Power Battery Silver. It has the characteristics of high quality and high density， whether operate in low temperature or high temperature， it is durable. Furthermore， it can provide continuous power for your device. In addition， it has the characteristics of durability， reasonable prices and excellent quality. I am sure that it will be good choice for you. It is worth having a try!                                    Features            High quality and durableExquisite design， made of high quality materialHigh energy density， long life batteryPortable and convenient and rapid chargeFit for iPhone4/4S/iPod/iPad2/3 /MP3/MP4/PSP/GPS                                                             Specifications             Capacity     4200mAh(Li-ion)    <br> Input     DC 5V/ 1A    <br> Output     DC 5V/ 0.8A-2.1A    <br> Material     Metal    <br> Weight    147 g /5.19 oz    <br> Dimensions     (9.3 x5.9 x 1.5)cm / (3.66x2.32 x 0.59)" (L x W x H)    <br> Color     Silver    <br> Compatible with     iPhone 4/4S/iPod/iPad 2/3 /MP3/MP4/PSP/GPS     <br>                                                             Package Includes            1 xUSBCable<br>3x Switch (Apple， MiniUSB， MicroUSB)<br>1 x Power Bank<br>