Battery type : Lithium-ion rechargeable cell battery Input voltage : DC 5V Output voltage : DC 5.1V Input current : 2.0A(TYP) Output current : 2.1A(TYP) Rated capacity : 3.75V/16000mAh(TYP) Charging time : 9 hrs with 5V/2A plug and standard cable 14.5 hrs with 5V/1A plug and standard cable