inputs.text: great small battery backup usb device - purchased imp500 battery backup iphone itouch left really long trip weeks ago went thru airport security no issues connected battery pack itouch battery died worked great able continue watching movie get quick charge time people saw using became popular even shared itouch iphone users needed quick charge plane flights airport terminal didnt walk around searching seat near electrical outlet plug wall charger alone made purchase worth every cent paid unit small light convenient carry around leave backpack time since unit usb port power chargeup usb device like take gps long trips leave car wall charger home think quality battery pack good price reasonable best longest lasting versatile battery pack market customer service excellent quickly answered questions unit made purchase satisfied everything product company purchased second imp500 give gift friend would give review company offers 30 day money back satisfaction guarantee dont like send back cant ask