The uses tiny amounts of fuel (liquid borohydride) that generate electricity to power devices through a USB port. Unfortunately though, once a Powerpack runs out, it has to be recycled.

Companies are working towards creating fuel cell power sources that can be refueled, but have yet to bring one to market. Fuel cell technology has long been a vision that was not seeing fruition but it may soon become more readily available because of changes in key regulations concerning flying with fuel cells.

This year, the Department of Transportation changed its regulations to allow cell phones with methanol, butane and formic acid on airplanes.

"That was one of the largest challenges to this market, to overcome that regulation issue," said Sara Bradford, an energy and power systems consultant for Frost & Sullivan in an story.

Lilliputian Systems, a Massachusetts's based company plans to launch a portable fuel cell charger the size of a cigarette lighter for cell phones, digital cameras, iPods and GPS devices by the end of next year.