Which is the best 20-volt cordless drill to buy? This question is probably why you’re here, and when it comes to the power of your tools, you clearly want the best of the best if you’re on the look out for a 20-volt power tool. Even though 18-volt cordless drills can work, the extra 2 voltage goes a long way. With a higher voltage, cordless drills can give you the same power rating as lower counts but the interior of the tool is a bit different (and higher quality) — you have a lower current with thinner and less weighted wires (usually needs copper, a better-quality metal as opposed to aluminum). With 20v of power, you’re also getting higher counts of RPM (rotations per minute) to help with your work more quickly and efficiently. Let’s see what’s out there today.