inputs.text: imp500 external power pack - decided purchase imp500 powerpack careful reading reviews evaluation proposed comparable products overiding factor end purchase imp500 considerably higher rated battery life convenience able charge iphone ipod blackberry products factory claims every thing propose fully charged battery life beyond compare ease use transitioning blackberry ipod quite simple device really frees ipod iphone blackberry fully utilized road especially traveling long distances not run battery power devices normal usage situation watch videos run apps ipod day train not run expect utilize product trip europe spring feel confident enough power keep ipod going long flight previously apps video watching running return trip ct nyc dont worry loss power also charge blackberry without significant drain imp500 accompanying tips make usage products simple affair would heatily recommend imp500 choices due long battery life ease use one product really delivered manufacture stated