Since I never get the battery life quoted by Apple on my MacBook Pro, i’ve removed Flash from Safari as per the link here. There are reports of Flash reducing battery life by 33% (see next post). I’ve installed Chrome, which has a Flash player included, for sites that I really need Flash.
Will see if browser speed and battery life change. http://daringfireball.net/2010/11/flash_free_and_cheating_with_google_chrome