I have the older version of this charger, which is a little larger and holds slightly less charge. I absolutely love this thing. I can't tell you often it's gotten my phone through a long day, either when I'm traveling or just out for the day and unable to get to a wall outlet. This battery can charge my phone three times (your mileage may vary) and I've also used it on flights for my ipad. Definitely a must have item if you'd be lost without your phone!