... -Voltage constant circuit protection -Mini flat shape with big power 5200mAh/3.7V MOBILE power bank for cell phone, psp, MP3/4, GPS, digital ... , ipod, iphone4/3G/3GS, Ipad. product specification: 100*43*25mm capacity:5200mAh/3.7V rated input:DC5V 1000mA package: neutral color ... the color client likes,but certain quantity) 5200mAh/3.7V MOBILE power bank for cell phone, psp, MP3/4, GPS, digital camera, ...