Of all the battlefields we've witnessed in the browser wars, this one's never really crossed our minds before: energy efficiency. Yes, the power efficiency of a piece of software, not hardware, is being touted by Microsoft as a differentiating feature for its fresh new Internet Explorer 9. It's thrown together the top five most popular browsers and put them through a cycle of benchmarks -- including Microsoft's own FishIE Tank graphics acceleration test, but not the somewhat popular Adobe Flash -- while measuring how much power they use beyond what the underlying Windows 7 system needs to keep itself going. Shockingly, IE9 was the winner each and every time and there's a tenuous conclusion drawn that if you want good battery life, you'll be going with Internet Explorer. Oh well, whether you consider them a good laugh or really valuable buyer's advice, there's plenty more of these power consumption comparisons at the source link below.