Amzer 10A/50W 4-Port USB Car Charger with Intelligent Rapid Charge Technology Extraordinarily Powerful: 50W of power lets you charge up to 4 tablets, smartphones or other devices at full speed simultaneously. Exclusive SI: Detects your devices to deliver its fastest possible charge speed up to 2.5A per port or 10A overall. Safe and Reliable: Low heat, short-circuit protection, temperature protection and Certified By CE & RoHS. Quickly, easily and efficiently charges both high and low-current USB outputs. The most powerful compact car charger is just 43.36 x 38.05 x 104 mm.