FWIW I found a good way 'for me' to use the alarms on my CORE with my EDF foam jet. At first I had the countdown timer and battery low voltage (from PBS-V60) coming on at about the same time. So it was a bit of a chore to refer to the Tx screen to see which one I was getting. Now I have the Tx countdown timer set to a value that is very conservative, in essence it just tells me I have been flying for 4 minutes and I should expect low voltage warnings soon. This way when my transmitter next alerts me I know it is a voltage alert. I've been using this in a very efficient airplane (Freewing 80mm T-33) and flights from 5-8 minutes are possible based on pack demand and relying on telemetry which is terrific. I suppose a count down timer is not even necessary at this point but old habits die hard...