I have a Gateway p7811fx with a single 9800m gts and p8400...with a 2600mah battery, I can get 3 hours of web surfing.
Now that Toshiba has a 9400 along with a pair of 9800m gts. So it can probably turn off the pair of 9800m gts. Also it has a 3200mah battery. It should have decent battery life with all that power, but it all depends if it can turn off those 9800's.
But this 706/708 is a guzzler, look at the a/c adapter...230watts! Mine is 120watts.
Also the 9800m GTS RUNS HOT...so that toshiba must have some heavy duty cooling.
Finally, WTF is with the screen resolution!?!?! 1680x1050!?!?! Where is the 1920x1200?!?! SO MUCH POWER ON SUCH A SHITTY SCREEN!
edit: forgot to add. The 9800m GTS is a 9600gt. And we know that a pair of 9600gt are awesome, with an 80%+ scaling. I wonder if we can expect the same scaling performance with the 706/708