The power of your drill driver largely depends on the voltage. The higher the voltage, the more powerful the drill will be, and also more expensive. Drill drivers range from 10v to 24v. If you are purchasing a drill driver for performing light-duty jobs like drilling or driving screws into materials such as soft and hardwood, plasterboard/drywall, and plastic, a drill driver with a voltage of 12v or less will be enough. For heavy-duty jobs, like drilling or driving screws into metal and ceramic, a drill driver with a voltage of 14v or more is required.