I have a MBP its about 4 years old now. Intel based.. Runs super hot.. Always has. I just replaced the batter for a 3rd time and now even with the new battery after 10 mins of it being on battery power it just shuts off. Will not turn back on until I plug it back in yet battery has almost a full charge. I did the unplug the batter and hold the power button down for 5 seconds nothing. Anything I can do to fix this? Thing just runs so damn hot all the time.