My MB was down to 17% and I plugged it in and continued surfing. About 5 mins later my screen dimmed so I knew it went back to battery power. When I checked the plug for proper connection it was VERY hot. (no indicator light was on). Anyone experience this before? I get good battery life and all. Dunno why it decided to do this. Hope it is not a dc in board or something. I plugged it back in and it came on for a second and kicked off again.