The operation of impact driver is based on converting the energy caused by impact into rotating energy. This is a different type of drill/driver that uses the motor to do the work.
Even with large screws, the motor will not require more battery power. This keeps the motor from getting overloaded and the battery from running down. That is why impact drivers are especially well-suited for use with screws with large diameters.
When working with delicate materials, be careful not to drive the screws too far or even through the material with your impact driver.
Impact drivers require little effort to use, unlike regular screwdrivers which can require a lot of force to operate. This allows you to work very easily with the impact driver in awkward positions, for example in a corner. In situations where you cannot stand directly behind the machine to absorb its power, the impact driver may be a solution.