This is truly one of the best power banks I have used. I really like that it has 2 usb ports and ac outlet port. The unit is compact and durable. My wife and can charge both our tablet at the same time, and it takes almost the same amount of time it takes in hour wall outlet at home. The LED indicator light is great for identifying the charge amount. I specially like the ac outlet because I can use my 4 usb adapter to charge multiple devices. The unit does take some time to fully charge but the charge last a long time. Overall, this is a great power bank that is lightweight (3 pounds) and durable.