I made this awesome spreader from an old spreader and motorized it with a fan motor from a car. I power it with my ATC battery, or I bungee another battery and power it with that. It's better than anything I could have purchased! My cost to make it was essentially zero. I just threw it together with some spare plywood and 2x4's thinking it wouldn't work but it is really good. I've thought of mounting the trigger on the handlebars and putting a switch on the power, and an adjustable resistor, but it works great the way it is.