I was not flying near any transmitter masts, or towers or potential interference, always fly at the same field. I have a number of friends with the A9 and None of them have this problem. I am afraid this is a hardware or software issue specific to the A9x. I would appreciate a sincere and appropriate response from Hitec. I have called their tech support and get no real answers. They just told me not to use the percentage readings and use only the voltage readings. If the percentage readings are Not correct, then Hitec should Fix it! I bought Hitec's flagship radio expecting the best. Unfortunately, I am Not impressed with these issues and side stepping responses from hitec. It appears that I am not the only one.