Corded drills are plugged into an electrical source. Their power comes directly from being connected with an outlet. Corded drills are more powerful than cordless drills because they are directly powered, whereas cordless drills are battery-powered. Batteries generally do not provide the same power as a direct electrical source. You can get some fantastic and powerful cordless drills but even with them, you don’t get the same consistency of power that you can get from a corded drill.