The Battery Bank Sharper Image Back Up Power Supply is the perfect solution for keeping your devices charged on-the-go. With a powerful 4000mAh capacity, it can charge most phones up to 2 times before needing to be recharged itself. The compact design makes it easy to take with you wherever you go, whether it's for a day trip or a longer vacation. This power bank features a USB port for charging your phone, tablet, or other devices. The LED indicator lights let you know how much power is left in the bank, so you can plan your charging accordingly. With the Sharper Image name behind it, you can trust that this battery bank is a high-quality product that will keep you connected when you need it most.