USBCELL batteries might look like ordinary AA rechargeable batteries upon first glance. That is, until you see how they’re charged. Rather than use a battery charger, the batteries are charged using the standard USB ports on your computer or laptop. They could come in handy on trips where you need power for your camera or flash, but want to avoid the hassle of a separate battery charger.
USBCELL AA Rechargable Battery [Amazon]