I've been playing around on my new laptop which is an ASUS ROG GL551JM-DH71. And it performed great while the charger was plugged in, but as soon as i took it off the charger the frame rate plummeted and was just nowhere near how good it was once it was plugged in. Is their a reason for this and how can i fix it so i don't have to sit near an outlet every time i wanna game on my laptop. Thanks!