Sophisticated and lightweight, the Tumi 4,000 Mah Powerbank is a useful mobile accessory. Offering quick charge time with enough power to charge an average smartphone 2x, a 2.4A USB port for almost any USB device, and a Micro-USB cable for charging in a bag or briefcase, this high tech accessory comes in handy while on the go! The sleek construction and practical size make it easy to store this power bank in your travel gear.