The Bosch ART has an 18-volt 2.5Ah battery, meaning wrestling with extension cords is definitely a thing of the past. On 1 charge, you can trim as much as 1,000 meters of grass edges. You'll mow in a 26-centimeter circle using a robust plastic blade instead of the traditional wire coil. The advantage is that you can trim more accurately and it saves energy as well. The head and the pole of the ART 26 Li are adjustable, so you can work with a trimmer between 80 and 115 centimeters in length and neatly cut the edges of the lawn. The ART 26-18 Li + comes complete with a set of wheels to easily move it around.