Our team is building a robot for a competition this week. We are using HiTec HS-475B hobby servos for some motion. The system is drivenwith a 7.2 VDC battery. The servos are really straining on a couple of tasks. They don't have quite enough torque to make me comfortable. We are supplying the servos with power via two ~0.7V drop diodes in series from the 7.2 VDC battery. I measured about 5.8 VDC at the servo under heavy load. My question is this - does anyone have experience or knowledge about driving these servos (or any hobby servo) with 6.5 VDC (one drop diode) or 7.2 VDC (no drop diodes)? The duty cycle for this application is pretty low. The servos will run under load for only about 10 seconds for the entire competition.