The main advantage of a cordless hedge trimmer is that you have complete freedom of movement. You don't need a power supply and you don't need to struggle with extension cords. In general, a cordless hedge trimmer is suitable for small to medium-sized hedges. When choosing a suitable hedge trimmer, it's important to keep the branch thickness in mind. Not every hedge trimmer is suitable for thick branches. Some models have a telescopic tube. This is useful if you want to trim high hedges.