Practically all of the videos I’ve seen show a low bat warning. I assume they go by a separate timer based on experience and don’t actually measure anything on the drone. That would have to be calibrated and is probably too much effort for a single use device.

Why would they do this

Oof. This should be NSFL.

Oh wow this looks really nice. I’d really like to try a sculpted board some time, need to figure out if any meetups are happening around here.