Eee PC enthusiast Tenacious Dre has put together a 15-hour 12-cell cell battery for his overclocked netbook. I guess he won't try passing it through airport security, because the thing looks like an ACME bomb:

To create his deformed battery contraption, he got the Lithium Ion cells from his old laptop, sticking them together with wire and electrical tape, and then dispossessed himself from any sense of aesthetics or shame. [Eee User via Portable Monkey]