Hi
No its not a battery fault tried three different batteries in the Tx. Standard NiHm, high mAh NiHm and a lipo pack and get the same beeps and vibration warnings. My main concern is how many times is the 9x supposed to beep and vibrate at 3/4 1/2 and 1/4 levels. If I can find that out I would know for definite if it was a Tx fault or not.