Hello, I have been browsing the forums and I have some general questions about my Macbook Pro. Specs: 2.4 Ghz Core 2 Duo 2GB memory 15 inch screen Standard Macbook pro. I have the istat widget installed and I monitor my temperature when plugged in and running on battery. Right now my battery is charged but still plugged in and after 20 minutes of web surfing and itunes my temperature has been floating around 80 degrees celsius. Is this normal? Does the MPB run hotter when on battery power? Why do the fans kick in so late to cool down my system? Only when I hit 80 do the fans finally kick in to 2500-3000 RPM Why is my MBP running hotter than others? I hear about people's always hanging around 60's and low 70's. When I am on battery power it even reaches into the high 80's before the fans kick. If I install SMC Fan control, what is a normal RPM speed I should be running at? Does this decrease the life of my fans and void my warranty? Help would be much appreciated.