Fuel cell cartridge
LAS VEGAS--I had some hands-on experience with the Mobion Fuel Cell Generator in December and decided to bring it with me to CES 2011 with the intention of using it as the only charger for my iPhone 4 and seeing how this green technology would work out.
In case you're anxious, it worked out OK, though not perfectly.
Prior to the trip, MTI Micro, the device's maker, told me that while the generator itself would pose no problem, the fuel cell cartridge, which contains the fuel liquid, has not been approved to be included with carry-on luggage so I should leave it at home. I brought both with me anyway and was able to go through the Oakland airport's security with no issue. When I arrived in Las Vegas, MTI delivered two more cartridges to make sure I could charge my phone during the entire show.
http://ces.cnet.com/8301-32254_1-20027946-283.html