Multi-tools without battery are an affordable and durable choice for DIYers who already own enough batteries. For example, If you already have a Bosch POWER FOR ALL 18V battery for a different cordless tool, it'll also fit on a cordless multi-tool from the same brand and the same battery platform. That means you don't have to buy a complete set. In addition, a cordless multi-tool is very useful if you don't want to be restricted by cords and want to work in places that don't have a power supply.