"Im away chilling at my caravan at the moment but when I get home and have my hands on my CX20 I will have a look at all the settings you can access via Mission Planner and get back to you... I will see what options mine gives because I am sure I saw…"

"I am a little confused.You haven't mentioned you have checked that its set in Mission Planner.
Have you downloaded Mission Planner Software and installed it on a pc or laptop and connected your cx-20 to it via usb connection and then gone into the…"

"again, try downloading Mission Planner and connecting your CX-20 via the usb connection and check the settings in Mission Planner to see what the Low battery alarm setting is set to... "

"Thanks Bayu Octariyanto  for letting us know you have also resolved this problem by following my post.
Many problems can be fixed from changing settings in Mission Planner software including changing the point at which the CX-20 shows a Low Battery…"

"Arming Problem - 
Have you checked that the "Arm/Disarm" option in the Mission Planner software is set correctly. I had this same problem after I had completed a firmware update. I found that with the CX-20 connected to the Mission Planner software…"