You will start to drain the battery if are doing ForScan for a long while. Make sure the HVAC and Stereo are off as well. I would do several functions and then run the truck periodically to charge the battery some. Really was only an issue when I first got started and was backing up all the files and doing many different changes.
Same. Saw it during backups. Haven't seen it since. I continued on with the backups despite the warning and was fine. I knew there was no way my little 15 minute Forscan session was draining the battery below an operable voltage.