A British company, Moixa Energy, has developed a new product under the name Usbcell. It’s a 1300 mAh NiMH AA battery that can be recharged through a computer’s USB port.
For the moment, the Usbcell is only available in the UK and costs about €20 for two batteries.
Usbcell Homepage [ usbcell.com ]
Brits bedrijf brengt oplaadbare usb-batterijen uit [ tweakers.net ] (Dutch)