Loaded with a USB-c port, two USB outputs, and 10,400 mAh battery capacity, the Tenfour charges up to three devices at once to completion—with room to spare.. Quick-charge USB-c port can charge a laptop. 3.1 amp charging speed, allowing the product to charge 1 device quicker than a wall outlet. Will charge a smartphone 4 to 5 times, or fully charge a tablet 2.5 times (depending on size). Built-in short circuit and surge protection. Sleek design for maximized portability.