http://www.notebookcheck.net/Review-Asus-G60VX-Gaming-N...
"Before we look at the battery life, we should occupy ourselves with the G60VX's energy requirement. The notebook allows itself between 23.2 and 29.7 watts in idle mode, which still is a moderate power consumption. The G60VX gets even more thirsty under load and drains between 86.8 and 116.9 watts out of the mains. The consumption reduces itself to 0.2 in a deactivated state and in standby mode to a (too high) 0.7 watts. Note: The big adapter included didn't only heat up properly with up to 59.4°C but also emitted a disagreeable beep tone every now and then during our tests. If this is a general problem or if we simply had bad luck with our prototype can't definitely be said.
So liegt die maximale The G60VX's battery life turns out overall meager. The maximum runtime with minimum brightness and maximum energy savings mechanism is 2 hours and 16 minutes (BatteryEater Reader's Test). Turning up the display brightness to its maximum and surfing with WLAN in moderate energy savings settings, lets the G60VX already runs out of breath after 1 hour and 50 minutes. Merely 1 hour and 20 minutes is even possible at DVD rendering. Therefore, it's not really a wonder that the notebook runs out of juice after 65 minutes under full load and without energy savings mechanisms (BatterEater's Classic Test)."
http://www.bit-tech.net/hardware/laptops/2009/07/30/asu...
"standard, the G60Vx is supplied with a 6-cell battery. We tested how much power it would provide when gaming by charging it fully, disconnecting from the mains, and then loading Crysis. We then let our hapless character die and auto-reload over and over, recording how long it took for the battery to be depleted.
With this test, the G60Vx gave us 48 minutes of battery life, which really is quite poor. As the G60Vx weighs in at just over 3.3kg (plus extra for the power brick), it really isn't the most portable of laptops, and we suspect anyone seriously looking to buy this machine isn't thinking too hard about mobility."
So overall its not much due to having GTX 260M