I have one of these and am very happy with it, it charges fast, can charge at least 2 iPhones from its single charge, can have 2 devices powered or charging at same time, percentage indicator, built-in light, it's light/flat/small, been with me on many trips including around globe, even Chinese customs didn't confiscate it while going thru 4 times. It's holding up extremely well for past 2 years: