Hi
Roger that. I would always start the day with all packs charged the night before anyway. I was more thinking multiple short flights on one pack. I would not initiate a flight on a pack with less that 60% anyway.
As example. I fly for 5 mins on one shot, land power down, move location and fly again. Or like yesterday waiting for the Sun to set and burst through the cloud. where I don't really want the AC just sat there in the sky then have to land to change packs and miss he moment!