Hello.
Is friend gave me a phantom 2 naza.
Can I use it as a regular naza v2 on my f550 if I buy the v2 pmu and led?

Hi,

Phantom 2 use a special modified version of the NAZA V2 and you cannot start your motors until the DJI smart battery is detected and it prevents using a PPM radio or ground station. In shortly you cannot use the P2 (Phanom 2 Flight Controller) on a F550 or any other multicopter except Phantom 2.

sky_aerial is right.

you cannot use phantom 2 flight controller on other multicopter without a DJI smart battery.

I have two smart battery's  from DJI. Mounted on my f550 with Naza lite.