With a battery-powered sander, you have a lot of freedom of movement and you can work in any location. Some sanders are part of a battery platform. If you choose a Bosch battery sander, there's a big chance it's part of the Bosch battery platform. That means you can also use the battery for other tools from the same brand and with the same voltage. This way, you don't have to buy a new battery each time. Dewalt and Makita battery sanders also have their own battery platform. Make sure you charge or replace the battery of your cordless sander in time, so you can continue to work without interruptions.