Powerful AA Battery to USB Device Charger

Need a highly portable USB power source that can be replenished with readily available, common batteries?  Look no further my friends ;) .  Inspired by the original Minty Boost project, this modder managed to shove 4-AA batteries into an Altoids tin to charge any USBpowered device.  So if you don’t have your laptop or PC nearby, simply pull out your Altiods tin and plug in your device!