No you aren't. It is not physically possible for the battery to run the gfx card and cpu at the needed power. I don't know the exact numbers of the gs60 but think of it this was way. GFX card needs 90 Watts, CPU 80 Watts so 170 watts, which is why they usually give a 180Watt PSU to account for losses. On battery your battery is usually like 60-80 watts. So only half of what the computer needs to run at full potential.