Hi Collyn. It would be helpful if you filled us in with a little more information, such as system (DC vs. DCC), type of powerpack, size of layout, scale, number of engines running at any one time, and so on...Is the "current" drop constant, or is it OK when you turn it on and then starts dropping. It could be due to any number of things, so the more info we have, the more likely some one can come up with a likely cause.