With recent storm outages in New York and New Jersey, the Hyperjuice products definitely comes in handy. Since more people depend on their cell and smart phones its a problem when power is out for days or even weeks. The Hyperjuice 100w can recharge an iPhone 23 times equivalent, and the Hyperjuice 222w can charge an iPhone up to 52 times equivalent as well or power an iPad 53 hrs or macbook 45 hrs.
There is a hyperjuice micro and mini and hyperjuice plug as well if one needs a smaller pack for just their iPhone and do not need to drive a macbook.