Hello, I have noticed that with certain apps and games the left palm rest area of the laptop getting uncomfortably hot. I am just wondering if this is normal? I cant remember or not if this has always been the case because I never used to use my macbooks keyboard or mouse in all honesty I always used it as a desktop but now that I travel more I find I use the built in keyboard. One app that will consistently cause it to run hot in that area is diablo 3. I am running OSX 10.8.5. I assume this is because of the battery no? Is there anything I can do about this? Do I need to buy a new battery? The battery seems to recharge just fine. Thanks in advance for any advice!