I was trimming more brass today and thought that I would show you the power version of the Lee QT. It is driven by an inexpensive SKIL rechargeable 4V cordless screwdriver. I have never done more than 100 cases with it, but the charge did not drop off. It uses a small lithium ion battery. It turns at 220 rpm. This is a fixed speed, not variable.
The power version is much nicer to use than the crank, but either gets the job done quickly. Like any tool, it is important to clean the preservative off before using it.