power consumption when powered off: H50 vs V3

Not having done any methodical test, it seems like my V3 will hold battery charge a lot longer than my wife's H50, when both are left powered off for long periods of time (say, 1 month). I'd expect the V3 battery to hold out a bit longer since it has a bit more capacity (4.4 vs 3.4 watt-hours), but the difference in sleep-lives seems to be a lot more than the 30% difference in battery capacity. Both are lithium-ion and the V3 battery has been cycled many more times than the H50 which if anything would help even the comparison.

All of which makes me think the H50 draws more power when turned off, which would be strange because, what besides the clock remains active when the camera is off?

thoughts? (other than chiding me for letting a good camera sit idle for a month. My excuse is my DSLR :-))