inputs.text: great product people go portable devices - [ edit may 8 2012 ] not sure review wound imp60d not one review imp50 posted reviewi using new trent imp50d five months use power recharge iphone 4 long crosscountry flights watch movies downloaded play games pass time anyone uses iphone knows activities run battery fast imp50d keeps iphone charged long flight ready conduct business get plane also use run mifi 2200 cellular wifi hotspot extended periods mifi 2200 power hog short battery life imp50d really comes handy wall power not handy mifi 2200 run laptops usb port get work time laptop run mifi 2200 imp50d instead even use imp50d run usb powered led light night go campingmy wife medical researcher travels hospital hospital needs internet access laptop rather fuss hospitals department get connectivity uses mifi 2200 borrows imp50d day imp50d sees lot usei read reviews not seehem get expected performance imp50d rechargeable external battery pack important fully charge using else not deliver expected performance half charged pack not deliver half run time fully charged pack usually significantly less way battery chehemistry works not design flaw find fully charge imp50d overnight keeps going day start day partial charge get get heavy user usually run part way day key getting proper performance giving full charge every timei like cable two usb adapters provided used charge imp50d power portable devices iphone 4 course proprietary usb cable must use instead apple thing found wall usb charger wireless mouse perfect charging imp50d not plug laptop usb hub charge also charged usb wall charger iphone curiously mouse charger charge imp50d faster iphone charger anyway go want charge without opening laptop bring along iphone usb wall charger use itthe imp50d excellent addition portable office certainly extended work time away wall power saved bucket business trips keeping iphone mifi 2200 running long periods without access power solidly built excellent product price