here's the response i got from hosa:
"If he wants to know the difference of current between with or without signal being applied/sent, the current should be about 10% up when signal is in existence against no signal."
and a field report:
got to suwannee on thursday and set up for dtb, went all day friday, and all day saturday(with every intention of recharging sat. night, i forgot), and all day sunday. total hours on full charge, 37.5 so i'm pretty stoked on that.
jr