After a mishap with my P3 Pro sent it to be repaired. They said it would be 8 weeks. So I purchased another P3 pro. however, the 2 batteries I had for the old P3 pro cause it to hover in a small in circle and seems to be difficult to fly. I believe the old P3 and batteries were before firmware update. How do I update the firmware on the 2 batteries? HELP!