Hey guys! I have a few questions about my MacBook (early 2009)'s battery... 1. Both on Apple and on the MacTracker app, my battery life is listed as 4.5 hours. My question is 4.5 hours of what? Because watching videos and surfing the web are two very different things. Both give me different times. Also... 2. What else (besides keeping brightness down) can I do to give me a longer batter life? My battery (which is the same one that came with the computer) still holds 96% of charge. I got around 5 hours of doing surfing, editing and YouTubing in one day. I want to totally maximize its life. Thanks!