Hello, So I been with my MacBook for a little over a month now, I upgraded the Hard Drive to 7200 RPM Seagate 320GB and happy with. But lately I started to notice that the battery lasts me a little over 3 hours, I have to admit I am I heavy user, I usually have RDP open which spikes up the CPU and my minefield (FF 3.1 beta with gestures) has gazillian tabs open and cpu usage for that is usually 20-30%, I am connected to eather AP express N or extreme N, bluetooth is off. The Mac does get hot at times. Is the battery time of 3+ hours normal any recommendation ? Thanks in advance.