CyberTech Dual Desktop Charger Cradle Dock with Spare Battery Charging Slot for Samsung Galaxy S4 Dual Desktop Charger for Galaxy S4 - Verizon, Sprint, AT&T, T-Mobile & Others 2-In-1 Features: Charge Phone and Charge Extra Battery Protection circuit will not overcharger, LED indicator light The USB docking cradle holds your Smartphone at a comfortable reading angle and provides convenient access on your desk Portable design and convenient for travelers and business users