Dissadvantages of Suction?

[Dumper FTW 435]

This year my team is experimenting with a suction system for our robot. We're using venturi's and a suction cup to pick up the tubes. In our testing, it works great, and the seal is strong. But we have to keep the compressor going the entire time to keep up with the loss in air pressure, and we're afraid that our battery will die quickly. We are getting 3 new batteries this year, and we have several batteries from past years (although most of those are going bad). Our main concern is that we won't be able to charge our batteries quick enough between elimination matches (if we get into the elimination matches).

Can everyone voice their thoughts?

I like the idea of suction. It's simple to build, and inexpensive (we already have the parts). But many of my team are worried about the battery