I bought this item to have charging capability on the go for my smartphone. This product does exactly that. With the 5200mAh capacity, I get about 2 charges on my Galaxy S II Skyrocket. It also works on my tablet. I had considered add on battery packs that simply encase your phone in a larger case with a built-in battery, but the bulk really makes the built-in products less desirable. What I like about the iTorch is I can keep in in my briefcase or car and just pull it out when I need it. Also, another selling point is the versatility in that it works with just about any phone or tablet that uses a USB charger. So, even as I upgrade into the future, I should be able to continue using this product. As a plus it has a laser pointer and LED light built-in. The re-charge time seems fast and it holds the charge when stored, so it really does work as advertised. For the price, I think this is the best value out there.