Below are my reviews of each model, including my pick for the best cordless drill worth investing in. The Best Cordless DrillsBest Overall:Best Budget:Best Heavy Duty:Best Power:Best for Beginners:What to ConsiderPower Like all cordless tools, a cordless drill’s power output is designated by the voltage of its motor. Weight typically varies from around two pounds for some of the lightest drills up to four pounds for heavier cordless hammer drills. Head size, which is the measurement from the tip of the cordless drill’s chuck to the back of its head, determines how tight a space a cordless drill can fit into. Key Features These days, cordless drills come with a bevy of features that give you more control over their performance.