This iTorch is an awesome product and an amazing convenience to have. It does everything I could hope for. The battery capacity is more than sufficient to supply multiple devices enough power to last throughout the day. I am very relieved to know I have a backup power supply in the event I forget to charge a device before class. I will be taking a lengthy road trip soon and I am certain this external battery will be a lifesaver for everyone involved. New Trent was brilliant to use a USB, the compatibility with other devices is the best. Almost every device these days has the capability to charge through a USB cable and most include it when you buy!