Backvolts ?

[Wicked Stick]

I got a chance to download the data from my first flight and was looking at all the columns of data that get recorded. Was wondering what Backvolts is ? mine started around 1.9 and grew to about 3.1 by the time the flight ended.

I do not have any Backup battery, only the lithium battery in the 3500 and the main battery.

[Trevor Conroy]

That is the backup voltage wired to pin 15. Ignore the value if you don't have anything connected to that pin.