Convert one minute worth of “hand cranking” into 30-second worth of emergency power! Yep, this Hand Crank Emergency Cell Phone Charger can do just that. It is based on the same principle as a standard dynamo, but is super portable and meant to charge only your cellphone.
“Its integrated 2,000 mAH lithium-ion battery recharges fully from a 2 1/2-hour USB connection to a computer or a USB AC adapter using the included cable, providing ample energy to fully charge most smartphones (requires smartphone charging cable).”
Price? $60. Available at Hammacher Schlemmer.