Phantom 3 battery question

[4 inch pistons]

A buddy of mine found out I now fly drones and has offered me a mint Phantom 3 with very flew flights. The only issue I see is that he has only 1 battery. It has been perfectly maintained but is still only 1 battery. I know it is the older camera but the idea of only 1 battery is more concerning. Can batteries be gotten for the older DJI Phantoms?

 

[dirkclod]

Sure you can find non OEM ones.