3 dive day tooth diving, roughly 30 min bottom time - run my reel out while on the trigger (speeds 3-4), blow sand good portion of dive (speeds 1-2, mostly 1), leave reel and scooter back to anchor line (usually speed 5+). End of day batteries will be usally have one light (out of 3) dimmed, I think once in a full day I got it past two lights (which I guess is down to 33% now that I realize its 3 lights...)
2 dives constantly on trigger - just did that recently on our Morehead trip, did two dives with buddy with scooter where we were both on trigger the whole time, at least speed 3-4, batteries at end of day had one bar gone. Other days where I just use the scooter to cruise a little around the wreck then tie it off for most of dive the batteries still show full at end of day.