recently, i experienced an issue with my refurb mbp. after running on battery until the warning signal came on i plugged in my adaptor and continued to use it. shortly after i began to hear the speed of the fans kicking up, checked istat and saw that they had reached 5500 rpm i quickly shut down my computer then rebooted only to experience the same problem i then pulled out the ac adapter and the fan speed reduced to the usual 2000 rpm when the battery is fully charged there is no problem. My question is should i allow my mbp to run like this until it stops? Does turning off the computer and allowing it to charge damage the computer as it would get to the same heat without anything cooling it down? Does this happen to anyone else?