I have a problem on a 2009 17 inch MBP... everything is fine using the integrated graphics card, but when selecting the discrete 9600 GT I have random shutdowns when on battery power, but not when plugged in. My battery showed the "service battery" sign for a while, but it has gone back to normal, despite showing only between 70-84% health in stat menus... is it possible that the aging battery is no longer able to cope with peak current needs of the more powerful graphic chip?
hope to have some input on this...
hope to have some input on this...