power to servo

Hi
I am working with the servo example and I want to drive a TowerPro MG995 servo.
But It looks like the servo don't get enough power, can I power the servo separately, with my 7.2 volt battery.
Without harming the Arduino?

(I have only the power from USB, connected to the board)

Thanks

You can power the servo from a seperate battery. Connect only the servo ground and signal to the arduino. Connect the ground also to your battery but the servo Plus voltage (it is probably a red wire on the center pin) should be conencted to your battery only.

7.2 volts is the maximum voltage for that servo, be careful your battery voltage when fully chareged is not higher than that.