Ryobi RY40220

This versatile 40-volt lithium-ion string trimmer cuts a 13- or 15-inch path through the thickest grass and weeds, reaching places that are inaccessible to your mower. Plus, it has enough power to run two string lines and the endurance to cut up to an acre's worth of grass on a single charge. And if you want to expand your arsenal, you can attach a blower, pruner, or edger, sold separately. [$179; ryobitools.com]