Use the EW1233 2-Port USB Charger 4A to charge your smartphone and tablet. Does your smartphone support Quick Charge 3.0? The Quick Charge 3.0 function charges QC 3.0 enabled devices up to 4 times faster. The battery of your smartphone is charged from 0-80% in only 35 minutes! The EW1233 is also compatible with smartphones and tablets with QC 1.0 and QC 2.0 support. Even smartphones without QC support will be charged. The EW1233 has over temperature protection, over voltage protection, over current protection and short circuit protection.