Fast food is all about convenience and the above concept is a fantastic new convenience. Sure this won't work for people buying drive-through but for everyone else, this leans you can carry your entire meal with one hand.
See this REDDIT thread
Concept
AA Battery and USB Key in one
GeneralWe all have USB keys and we all use AA batteries so designer Wonchul Hwang has married them into one concept. Unfortunatly this is still only a concept but I'm sure someone will borrow the idea and create a kickstarter for it...
You plug it into a PC and use it as portable storage which also charges it. If you're stuck and need a AA battery for a flashlight or radio, just pull it from the PC and drop it into the device.
Source: instash