External cell phone batteries, 1/ capacity:2000mAh, 2/ portable charger could charge all iphones and Ipad,other mobile phone External cell phone battery charger for Iphone 4SProvides ... , anti-overload3)Compose Type : Injection Technology to make battery more stable4)Certifications : CE,,FCC, RoHS,ISO90015) Long ... low self discharge10) Light weight, small size External cell phone battery 2Ah-5Ah