You can power an angle grinder without battery with a matching battery you already have at home. This means you don't have to purchase a complete set and this saves you a lot of money. An angle grinder on battery is a smart choice if freedom of movement is important for your planned jobs. In many cases, a battery of the same brand, with the same voltage, and from the same battery platform is exchangeable with various tools. For example, you can use your Einhell 18V battery from the Power-X-Change platform not only on an angle grinder, but also on a circular saw or drill.