The new Internet Explorer 10 with a new java script engine consumes a very low voltage of battery when compared to other browsers. Here are the statistics for different browsers, out of which IE9 saves battery to a greater extent.
The test was conducted by Microsoft based on many factors. IE9 has many acceleration features which consumes less power. Even thought firefox 4 and other browsers have accelerating feature, IE9 performs well which inturn consumes less power. The Battery backup differs for different computer’s. Using IE9 may be useful for the students who hang’s out around the campus or for bussiness people.