ORIGINAL: JVB
I installed my YS110 on the stock Venus mounts. There is a lot of discussion about vibration. Hyde mounts has a big blurb on Central's site. They talk about battery current with different types of mounts. I thought I would see what mine was doing. My current draw is 43 mA with six servos and the engine not running. With the YS110 running, I was getting readings between 50 and 90 mA. The higher readings were at idle. I don't really know that this means anything. There is some vibration but it doesn't seem to have a big impact on my setup.
I don't know the current draw on mine, but I do know that I can easily get 8 flights out of my 2000-mah Li-Po Rx battery. I check before the first flight and then start checking every flight with the voltmeter after about the 5th flight and I think I could get 10 or more. And if that's not enough, I could recharge the battery and go on indefinitely.
So like you, my experience is that this is not an issue, at least not for the Venus II with stock mounts.