POWER PACK iEP370 5000mAh Universal USB Battery Pack For iPad, iPhone, Smart phones & Portable devices

Brilliant product, would not go any where without it. and so easy to use.

This powerpack came in very useful to charge up my iPhone battery during a long walk using GPS and viewranger software most of the day. I use quite a slim waterproof case so couldn't use an external case type battery charger to sit the phone in. Good...

Seems to do what it says it does. It really increases the amount of time I can use my portable devices. Very handy when you can't get to an outlet or USB port to charge. Small enough to be portable and available to use when it is needed.