Went out this weekend to some remote property to fly the Phantom. Did a quick flight when I got there and all was fine. Following morning I pop in a fresh battery, wait for the Phantom to do it's warm up and GPS home lock and away we went. It's flying around and I notice that I'm getting the fast red blinking after just a few seconds of flying. I'm thinking that it is strange that the battery is already low and I fly it around for like 4 minutes with it flashing like that. Bring it back in and land with no issues. So I grab another freshly charged battery. Pop it in the Phantom and it seems happy. Try to take off and the front takes off faster than the rear so over it goes. Grrr. Clean up the props. Take the camera off. Put battery back in and it tries to do it again. Change from GPS to ATTI mode and it takes off but is a bit erratic so I pack it in. Back at the house I hook it up to the NAZA Assistant software and no errors are seen. I didn't try an Advanced Calibration as I haven't read through that. What I did see, but didn't realize till later, was that the low voltage settings were very close to the normal voltage of the batteries. I need to find out what the typical values are for the Phantom and included battery. Will try an Advanced Calibration tonight (probably) and see if that addresses the flipping over on its back thing. My battery tester says my batteries were good when the Phantom was complaining so I'll have to look into that as well.