You can maintain your lawn cordlessly with a Kärcher string trimmer. Kärcher string trimmers are especially good at reaching corners and tight spots. This is partly because it's battery-powered. Every Kärcher battery brushcutter is part of the Kärcher 18V or 16V battery platform. That's useful, because that means that you can also use your string trimmer battery on other (garden) tools with the same battery platform.