Rapid 2.1Ah Dual USB Port Car Charger with Retractable Micro USB Cable for Samsung Galaxy S4 i9500 - PMICROMR2BK Innovative, sleek compact design? Smart IC Chip Technology prevents your device from overcharging, overheating and overcurrent? Provides 2.1Ah/10W of power, enough for two smartphones or one tablet and one smartphone charging simultaneously? Convenient 2 ft. retractable micro USB data cable included? Use your existing USB charging cables to charge most USB powered devices?