Promising review: "We bought these to take with us on a trip to Disney World. I was paranoid about having enough phone battery to last through a long day. It quickly charged my two phones and left plenty of extra juice to share with our other family members. It weighs about as much as an egg, so it was barely noticeable in my pocket. I can't recommend this enough!" —J. PalmerGet it from Amazon for $19.99+ (available in four colors).