With intelligent charge, this battery charger automatically identifies the positive and negative battery terminals. This lets you charge your Note 4 batteries quickly and easily without any hassle. The battery wall charger comes with a USB port on the side that can charge your phone while you charge your battery. With a compact design and foldable plug, this battery cradle is engineered to be taken anywhere you go. Tested with strict quality control standards, this charger is FCC, CE, and RoHS certified. The charger contains safe charge electronics that prevents short circuting, overheating, overcharging, and overloading. PowerBear stands behind our products. If you are not 100% satisfied with your new charger, just let us know! Contact us via Amazon and we can help with any issues that you may have. Customer satisfaction is our top priority, and that's the PowerBear guarantee!