I purchased this charger to prepare for a recent trip I was taking that required a 5 hour plane ride. I have an iPod Touch and I knew it wouldn't last for the whole flight without some backup charge. This charger did the trick; half way through the flight, the iPod registered as being 20% of battery levels, so I just plugged the Turbo Charge in, turned it on, and waited 10 minutes or so for it to charge. Then my iPod levels were high enough to continue for the rest of the trip. I also like the charger because it allows me to use rechargeable AA batteries, so I just brought a bunch of pre-charged batteries on the trip with me and had enough power for the full trip.