There are a few issues this device would need to address before I added it to my carry-on bag. First, how many devices use AA batteries anymore? Outside of my antiquated Canon A560 camera I'm hard pressed to come up with one.
And 20 minutes of cranking to achieve full power? And remember, that's just for one battery. Couldn't they just put a windmill on it and let me hold it out of the window on the train?
But the biggest challenge this device has is durability. Considering the size of a AA battery, that crank is going to be pretty tiny in order to fit within the devices exterior. If I'm going to be cranking for 20 minutes I'm not to sure it will hold up.
Regrettably I think I'm stuck with searching for free outlets in the airport for the time being. Once we get the power issue sorted out, perhaps they'll have figured out how to deliver free WiFi where and when I want it.