My bad, I was thinking about the disk batteries, CR3s.

Two of these would be equiv to a 1600mah hump pac. Just wonder how they'll do when the mah is made mostly of current since RC servos pull more current than a camera. The discharge graph says these should work, but the voltage is going to always be below 6v.

Depending on what servos you're running, the max discharge of 1amp may be a prob. Since you've already got them, give them a try, don't see anything that it can hurt. Check the temps on them after running a little while. If they're having trouble with current demand, they'll prob start getting hot.