super large capacity 20000mAh portable power bank for iphone/ipad high efficiency of power conversion long cycle life rapi super large capacity 20000mAh manual for power bank manual for power bank for iphone/ipad Specification: Cell type:polymer lithium ion batteryOutput voltage:5V,7.4V,9V,12V,16V,19VOutput current:1000ma-4200maInput voltage:19VInput current:1000ma-4200maBattery capacity: ...