How about a 40-hour laptop battery?

Unbelievable isn''t it? A laptop battery that can keep your laptop going for 40 hours! Yes, research is underway at Stanford Tech to develop a hi-tech lithium ion battery that can juice up your laptop for 40 hours, keeping those charging woes at bay for a longer period.

Apparently, the new battery uses a discarded technology that has been been revamped by Professor Yi Cui and team - silicon anodes in the form of nanowires for charging. This technology was earlier abandoned as the silicon expands up to 400 times when charged, exploding the battery in the process. Using silicon in the form of nanowires eliminates this danger.

So when can you start rejoicing? In a "few years time" is all the information we have at this moment.