Mary Lou Jepsen’s keynote presentation of One Laptop Per Child at our Greener Gadgets conference a few years back was without a doubt one of the highlights of the event. The OLPC laptop, known as XO or the $100 laptop, is a feat of energy efficient engineering, consuming just 2W of energy – which enables it to be powered through solar cells or hand cranks. In the video above, Mary Lou illustrates how the XO laptop is a new model for energy-efficient electronics, and inspiration to look at new ways of powering our devices.

Watch the full-length video of Mary Lou Jepsen’s inspiring talk here >