The new Mac OS X 10.5.7 version has modified numerous extensions in the system. according to Wired,some of those modifications might have improved battery lifetime up to 33% on a Hackintosh.
Due to a lack of time and material, we could not immediately confirm such information. So, there are two solutions: either Apple indeed worked hard and deep to improve battery lifetime especially power management, or nothing changed and Hackintosh are now recognized as more "Mac native" and can benefit from the pre-existing power management tools included in Mac OS X. Apple might have included options dedicated to ATOM processors, often powering hackintosh, so it could also be an explanation. Last but not least, the user reporting this information might have fixed an unknown bug with this new version, such as a silent power-draining end-less process in the
