Cordless Drill Buying Guide
Quick Answer
Voltage isn’t the whole story with cordless drills — torque (measured in Nm) and battery platform compatibility with other tools you own matter more for real-world usability than the number on the box.
Voltage vs. Torque
A higher voltage battery doesn’t automatically mean a more powerful drill — motor design and gearing determine how much of that voltage becomes usable torque. An 18V drill from a quality brand often outperforms a 20V drill with a weaker motor. Look at the stated torque (Nm) and the number of clutch settings, which matter far more for everyday driving and drilling tasks.
Battery Platform Matters More Than One Tool
If you already own cordless tools, staying within the same battery platform saves significant money over time — batteries and chargers are usually the most expensive part of a cordless tool system, and a shared platform means one battery works across drills, saws, and other tools from the same line.
Brushless vs. Brushed Motors
Brushless motors run cooler, last longer, and squeeze more runtime out of the same battery charge compared to brushed motors — worth the extra cost if you use the drill regularly. For occasional light use, a brushed motor drill is still a perfectly reasonable, cheaper choice.
What to Check Before Buying
- Clutch settings: more settings give finer control over driving depth, reducing stripped screws and over-driven fasteners.
- Chuck size: a 13mm (1/2″) chuck accepts larger bits than the common 10mm (3/8″) size — worth it if you drill larger holes regularly.
- Two-speed gearbox: low gear for high-torque driving, high gear for fast drilling — genuinely useful, not just a marketing spec.
Bottom Line
Before comparing voltage numbers, check whether you already own tools on a battery platform — staying within it usually outweighs a marginally more powerful drill on a different platform.
