USBCell Battery – This nifty invention, combining a 1300 mAh Nickel-Metal Hydride (NiMH) rechargeable battery with a USB plug, allows recharging directly from a computer, obviating the need for a special recharger.
According to the company, to fill the battery over 90% takes approximately 5 hours via USB vs. 7 hours via a regular charger.
More information on the USBcell can be found here.