This is one of the "handiest" external battery chargers I have seen on the market. Not only does it complete two full charge cycles on the iPhone and the Samsung Galaxy S2 and one full charge on the Kindle Fire, but it is designed to comfortably fit in the palm of your hand. The LED flashlight is a nice added touch and the laser pointer is great when making presentations. It would be even better if it had an additional 2.1 amp port, but this might effect the "handiness" of the design if it increased the thickness and weight of the device. As it is designed now, I am able to hold both the iTorch and my smartphone in the palm of my hand while charging. Overall, this is a "must have" for all smart phone users.