Hand crank cell phone charger

This sounds like a useful device for supplying low power electronic devices, in addition to it’s stated use with cell phones. It weighs 2.5 ounces. Not sure how rugged the package is, although on the IST site there’s a photo of it being used to power a cell phone by a pair of mountain climbers somewhere on the slopes of Denali.
From CNET news:
Innovative Solutions and Technologies’ SideWinder charger is a nifty little hand-crank gadget you can use to charge your phone anytime and anywhere–without a wall socket. The gizmo’s not brand new, but you could say it’s one small step toward energy independence: You get about six minutes of talk time for two minutes of manual winding, according to Montana-based IST. The SideWinder also has a small LED light for extra illumination. The product works with most cell phone models and is small, light and low-cost, retailing for about $25.
June 4th, 2006 at 10:47 pm
But are there cell towers or coverage in areas where electricty is scarce?