Quote Originally Posted by talltimber View Post
Could you explain that to me, I'm having a hard time wrapping my head around that one?
Non-digital motors use what's called a speed coil to reduce the motor speed. The motor continues to draw the same current no matter what speed, but at lower settings, some of it is dissipated as heat instead of driving the motor. Digital motors pulse modulate the battery power on lower speeds so the motor gets bursts of full current, reducing the power drawn from the battery.

The downside is that the pulsing tends to generate interference in depth finders.