Microsoft: windows7 vs. Vsita power saving 20%

Recently, a Microsoft spokesperson announced that the newly released Windows 7 will increase battery life by 20% compared to Vista in the same configuration. For this, Microsoft program manager Ruston Panabaker used two identical models of laptops to play DVDs for comparison. The test results show that the running time of the laptop running Windows7 is indeed longer than the life of the VISTA notebook. 20%. What is the test shots:

Overall, when the user is watching a DVD via a laptop, battery life in Windows 7 to improve at 10-20%. Panabek said that this is an amazing performance boost.
Last week, it was reported that after using the Windows 7 operating system, the battery life of the netbook was reduced by 1/3. Focusing on notebook reports The "Laptop" magazine tested the Toshiba netbook last week. As a result, the battery life of the netbook was reduced by 2.5 hours after using Windows 7. Under XP, the battery life is 9 hours and 24 minutes, while Windows 7 is only 6 hours and 53 minutes.
According to Tom's Hardware website test, under XP system, Acer Aspire Aspire One netbook battery life is 8 hours and 28 minutes, while Windows 7 is 5 hours and 54 minutes, also reduced by 2.5 hours.