The dSwitch is a switch designed to be used with Lego NXT Mindstorms hardware and software. The dSwitch controls any appliance in your house, such as a light, a charger, or anything else you can plug into a 110V switch.
A sample video on the use of the dSwitch by Dexter Industries
This video demonstrates the use of dSwitch as an automated battery charger.
Visit Dexter Industries at http://dexterindustries.com/index.html.
More information on the product at http://dexterindustries.com/Products-dSwitch.html