This product has been through everything with me! from waiting in line for 8+ hours for a concert to long drives to Disney in orlando! For $24, it is a bargain! And you can charge two devices at the same time! I plan on buying a second one for my trip to Hawaii soon!
I thought I wanted a power bank, and ultimately ended up buying a RAVPower on a whim before one of our trips. This thing is amazing! Juice it up the night before, and then use it on the plane, at the beach, or in the car when there's only one charger. One of the rare devices my spouse and I both covet. We have a smallish model built mostly for phones. It'll power your phone all day in a pinch. The blue glow makes me happy too.