I have a Ryobi and am completely satisfied with it. I mow about 3 1/2 acres with the tractor, and there's quite a bit of trim around the barn, house trees, etc. I have a 4AH 18V battery for it and one charge does the trim. The battery fits the rest of my Ryobi tools as well. And when Ryobi changes cosmetics of their tools, the batteries remain consistent.