I received this external battery charger at a discount for my honest and unbiased review, and I must say that I really like it. I have tried many of these and this one by far is my favorite. It is very slim and fits easily into my pocket as well as my wallet. The multi port cord is really great as well, and actually works when plugged into more than one device, however I would have liked it to be a little bit longer. Your devices charge very quickly as does the battery itself. It even came fully charged which is a huge plus in my book. I also love the fact that you don't have to press anything to turn it on. When you plug in a device it automatically turns on and vice versa when your device is unplugged. I highly recommend this one to everyone!