The Cordless Drill: Everything You Should know

What is a cordless drill?

A cordless drill is a handheld power tool that rotates a drill bit or screwdriver attachment using a rechargeable battery instead of a power cord. First introduced commercially in the 1960s — originally developed for NASA — it has since become one of the most essential tools in any toolbox, professional or otherwise.

Modern cordless drills combine drilling, driving, and sometimes hammering functions in one compact, portable unit. Freed from the constraint of a wall outlet, they let you work anywhere — atop a ladder, inside a cabinet, or in the middle of a field.

Key specs at a glance

Typical voltage: 12–20V

Max torque: 300–500 Nm

Speed (RPM): 0–2,000

Chuck size: 3/8″–1/2″

Battery type: Li-ion

Weight: 1–2.5 kg

Features that matter

• Variable speed trigger — Lets you start slow for precision and ramp up for power. Essential for not stripping screw heads.
• Clutch / torque settings — Automatically stops driving when a preset resistance is reached, protecting screws and surfaces.
• Forward / reverse — Switches rotation direction instantly; essential for removing fasteners.
• Brushless motor — More efficient than brushed motors, runs cooler, lasts longer, and delivers more power from the same battery.
• Battery platform compatibility — Many brands share batteries across their entire tool lineup, saving cost and reducing clutter.
• Built-in LED — Illuminates dark corners and cabinet interiors where you need to see exactly what you’re fastening.

Drill vs. drill-driver vs. hammer drill

The term “cordless drill” covers a family of related tools. A basic drill rotates a bit — straightforward and lightweight. A drill-driver adds a clutch system so it can drive screws without over-torquing. A hammer drill adds a rapid forward-and-back hammering action for drilling into masonry, brick, or concrete. Most modern “drill-drivers” handle all three modes, making them the practical all-rounder for the majority of tasks.

Common uses

• Assembling flat-pack furniture and cabinetry
• Hanging shelves, mirrors, and artwork on walls
• Decking, fencing, and outdoor timber projects
• Light automotive and electrical work
• Framing, drywall, and structural carpentry on site

Maintenance tips

Cordless drills are low-maintenance but benefit from a little care. Keep the chuck clean and free of debris; blow it out with compressed air occasionally. Store lithium-ion batteries at around 50% charge in a cool, dry place — never leave them fully discharged. Check that drill bits are sharp; dull bits make the motor work harder and reduce battery life. Wipe down the housing after dusty jobs to prevent grit from working into the ventilation slots.

Drill bit types — what goes where

The bit does the actual work. Using the wrong bit damages both the bit and the material. Here’s a quick-reference guide to the most common types.

Twist / HSS

Metal, plastic, and soft wood. The universal everyday bit.

Masonry

Brick, concrete, stone. Requires hammer mode. Carbide-tipped.

Spade / flat

Large holes in timber fast. Rough finish — not for visible work.

Hole saw

Large clean circles in wood, drywall, and thin metal.

Auger

Long, deep holes in timber. Used by electricians and plumbers.

Forstner

Flat-bottomed, clean holes for hinges and dowels in fine woodwork.

Choosing the right voltage

Voltage is the single number most buyers look at first — and the most misunderstood. Higher voltage means more potential torque and runtime, but also more weight. Match voltage to your work, not your ambition.

12V  (DIY / light trade)

Compact class

Light assembly, tight spaces, overhead work. Ideal for electronics and cabinetry.

18–20V (Recommended)

All-rounder

Framing, decking, drywall. Handles 95% of home and trade tasks with ease.

36–60V (Heavy trade)

High demand

Structural timber, masonry, and core drilling. Used by professionals on demanding sites.

Brushed vs. brushless — which should you buy?

Brushed motor

Older technology

• Lower purchase price
• Simple to repair
• Runs hotter
• Shorter motor lifespan
• Less efficient battery use

Recommended

Brushless motor

Modern standard

• Up to 50% more runtime
• Cooler, quieter operation
• Longer motor lifespan
• Adaptive torque output
• Higher upfront cost

Do’s and don’ts

Do

• Use the correct bit for the material.
• Start on low speed, build up.
• Mark the drill depth with tape on the bit.
• Keep batteries at 50% for storage.
• Wear safety glasses always.
• Clamp your workpiece

Don’t

• Force a stalled drill — release and retry
• Change bits while the chuck still spins.
• Leave batteries on the charger overnight repeatedly.
• Drill into walls without checking for cables.
• Use dull or damaged bits.
• Ignore overheating — let the tool cool.