This could be handy to have and easier to port around than a solar panel, batteries and charger/cables.
Fuel cell USB charger
"Fuel cell maker Lilliputian Systems today announced that Brookstone will be the first retailer to carry its portable USB power source, which will be sold under Brookstone's brand. The fuel cell device is about the size of a thick smartphone, and the lighter fluid-filled cartridges are about the same size as a cigarette lighter.
Pricing for the Brookstone fuel cell itself was not disclosed but the cartridges themselves, which are made of plastic and hold butane, will cost a few dollars, or "about the same as coffee from Starbucks," said Mouli Ramani, vice president of business development at Lilliputian Systems.
Lilliputian's fuel cell will be able to fully charge, for example, an iPhone 4 between 10 and 14 times with one cartridge"
Very interesting, sounds like a great option for emergency use! This would be great in event of hurricane or similar short term emergency, hunting/camping trips, etc.