uNu UNU-EP-03-4400-B-BLU Enerpak FLEXI Universal Battery Pack - Black-Blue This powerful device can fit inside a pocket or purse and is perfect for on-the-go reliability yet, still boasts the ability to re-charge almost any USB product including tablets and smartphones. Using a 1A USB port to charge almost any USB device, the Enerpak flexi contains 4400mah battery juice which can effectively charges most electronics at relatively fast speeds. While the integrated colorful microUSB cable provides a unique stylish look, it also enables user to charge any compatibly devices without carrying an additional separated cord. Designed with the best battery material, and most reliable circuit design, the Enerpak flexi is a safe and reliable source of re-chargeable power which can be recharged for more than 500 times. Made to be the perfect travel companion the Enerpak Series Battery Packs are plug-n-play, charges your iPhones, iPods and iPads, and all USB powered devices on-the-go at any location that you need a quick boost.