How to Read Cordless Drill Power and Torque Claims

Cordless drill packaging and product pages are full of bold comparisons. Claims such as ‘20% more power’, ‘35% more runtime’, and ‘2X more torque’ appear across 18V, 20V Max, and 24V Max lines, yet the fine print rarely explains what is being compared. Some figures reference older models from the same brand, others reference an entire voltage class, and a few compare brushless motors against brushed ones. Before spending money on a new drill, it pays to understand where these numbers come from and how to check them. This article walks through the math behind power claims, the difference between brushed and brushless torque, and the spec sheet details that predict real drilling performance. It also covers how brushless hammer drill technology and electronic torque control change what those numbers mean on site.

Start by Finding the Comparison Baseline

The first question to ask about any power claim is simple: compared to what? A claim of ‘20% more power’ with a footnote reading ‘compared to similar 18V power tools’ does not say which 18V tool, which motor, or which battery. Many manufacturers compare against their own older models, which gives buyers a fixed reference point they can verify. When the baseline is a whole class of tools, the claim can be true for one model and false for another. The relationship between torque and performance for construction drilling depends entirely on that baseline.

Three claims appear on drill boxes more often than any others:

• ‘20% more power’ against similar 18V tools: true only if current draw stays the same
• ‘35% more runtime’ against similar 18V tools: depends on load, battery capacity, and motor efficiency
• ‘2X more torque’ versus brushed motors: depends on which brushed drill is the baseline

To evaluate a claim yourself, work through these steps:

1. Find the footnote and identify the exact baseline
2. Pull the spec sheets for both tools and compare RPM, torque, and battery voltage
3. Check whether the claim holds at the voltages and currents involved
4. Test the drill under load with the bits and fasteners you actually use

Where the claims come from

The power tool industry has no single mandatory standard for advertising torque. Several trade organizations have published lab procedures that member brands follow voluntarily, and those procedures define how a drill’s relative torque output is measured and stated. Brands that follow the procedures produce numbers that can be compared across models. Brands that do not may still advertise torque, but the measurement method is left to guesswork, which is exactly when vague phrases like ‘more power’ appear in the fine print.

What a fixed reference point looks like

A statement like ‘compared to stated specifications of our standard product’ names the exact product line used for the comparison. That style of disclosure lets a buyer pull both spec sheets and verify the difference in minutes. Vague phrasing such as ‘compared to similar 18V power tools’ does not. When a marketing claim lacks a verifiable baseline, treat the number as an estimate rather than a specification.

Voltage, Current, and the Math Behind Power Claims

Power is voltage times current: P = V x I. A 24V Max battery pack uses six lithium-ion cells at 21.6V nominal, while an 18V pack uses five cells at 18V nominal. Six cells divided by five cells gives 20% more voltage. The marketing math then assumes the same current draw, which produces 20% more power on paper. In practice, higher-voltage tools usually draw less current for the same work, so the real gain depends on motor design, gearing, and load. A drill that loafs at 24V will not suddenly cut holes 20% faster.

The ‘Max’ in 20V Max and 24V Max refers to the peak voltage of a fully charged pack, not the voltage under load. A lithium-ion cell charges to about 4.2V and settles to a nominal 3.6V. Five cells marketed as 20V Max deliver 18V nominal, and six cells marketed as 24V Max deliver 21.6V nominal. When a manufacturer writes ’24V Max’, it is advertising the pack’s peak output, while the tool actually runs most of its life at the lower nominal voltage.

The same current assumption

If two drills both draw 2.0A, the 18V tool runs at 36W and the 24V Max tool at 43.2W, a jump of exactly 20%. But a drill working hard at higher voltage does not keep drawing the same current; the motor controller, windings, and gearbox all change how the battery is used. Independent reviews of the 24V brushless drill driver show that output depends on battery state, chuck condition, and the material being drilled, so a fixed 20% figure oversimplifies the comparison.

Why voltage is not power

Voltage is electrical pressure, not work output. Two drills running on the same battery voltage can produce very different torque because of motor size, magnet strength, and gear reduction. A higher-voltage pack enables more power, but the tool has to convert that energy into rotation. A 24V Max drill with a weak motor can lose to a well-built 18V drill in real hole cutting.

Brushed vs Brushless Motors and the 2X Torque Claim

Brushless motors replace the mechanical brushes and commutator with an electronic controller that energizes the motor windings in sequence. The controller lets the motor hold torque at low speed, run cooler, and convert more battery energy into rotation. That is why ‘2X more torque versus brushed motors’ shows up so often: brushless designs are genuinely stronger than brushed ones of similar size. The problem is the baseline. A compact brushless drill rated at 310 in-lbs beats a weak brushed drill rated at 150 in-lbs by more than 2X, while a heavy brushed drill rated at 450 in-lbs still out-torques it. Understanding what brushless drill torque specs tell you about real drilling performance starts with knowing the baseline.

The 2X claim does not tell you:

• the torque value of the brushed baseline
• whether the comparison uses peak or sustained torque
• the RPM at which the torque was measured

Peak torque numbers also hide the difference between a motor’s peak output and its sustained output. A drill that spikes at 450 in-lbs for a fraction of a second may settle to far less when driving a long screw or drilling through dense hardwood. Working torque is what the tool delivers continuously without overheating, and it is rarely printed on the box. That is why two drills with identical max torque ratings can feel completely different in the hand.

Reading the Spec Sheet: RPM, Torque, and Gearboxes

Two-speed gearboxes split drill work into a low range for driving fasteners and a high range for drilling. A drill rated 0-380/0-1450 RPM with 310 in-lbs of max torque and a drill rated 0-450/0-1700 RPM with 450 in-lbs look similar on paper until you check the low-speed range. Max torque is usually quoted at the low setting, where gear reduction multiplies motor output. Torque clutch systems and masonry drilling performance depend on how precisely the clutch disengages before the bit snaps or the fastener strips.

What max torque does not tell you

• Peak versus sustained: continuous drilling heats the motor and lowers sustained output
• Chuck quality: a slipping chuck wastes torque before it reaches the bit
• Test conditions: manufacturers measure with fresh batteries and specific bits

Testing torque on site

Spec sheets get you partway. A quick side-by-side test settles the rest:

1. Drive the same fastener into the same material with both drills
2. Count the seconds from trigger pull to seat
3. Switch to a larger bit and repeat
4. Feel for clutch slip and motor strain
5. Run both drills until the pack warns low and compare the work done

To compare two drills side by side on paper:

1. Write down the low-speed and high-speed RPM ranges
2. Note the max torque at the low-speed setting
3. Compare battery voltage and amp-hours, not marketing names
4. Check chuck capacity, 1/2-inch versus 3/8-inch
5. Count the clutch positions and confirm they cover the fasteners you drive

Runtime Claims and Battery Capacity

Runtime is measured in amp-hours, but the number on the battery label only tells part of the story. Capacity in watt-hours equals voltage times amp-hours: an 18V 2.0Ah pack stores 36Wh, while a 21.6V 2.0Ah pack stores 43.2Wh. That 20% energy advantage explains part of the ‘35% more runtime’ claim, with the rest coming from brushless motor efficiency. Runtime also falls fast under load. Driving 3-inch screws draws far more current than free-spinning the chuck, so a runtime figure measured at light load overstates what a framing crew will see. When choosing a compact brushless drill driver, torque, batteries, and kit value all feed the same decision.

Four factors stretch runtime on site:

• brushless motor efficiency under load
• higher pack voltage, which means more watt-hours
• lighter loads and shorter trigger pulls
• keeping packs out of direct sun and hot truck beds

Pack care stretches the same battery across years of service. Lithium-ion cells lose capacity with every full discharge, and heat accelerates the loss. Charging on a cool surface, storing packs at partial charge, and avoiding deep discharges on every cycle keeps a 2.0Ah pack closer to its rated capacity after a season of framing work.

Practical Checks Before You Commit to a Drill

Work through the claim, then work through the tool. Verify the baseline in the footnote, check the low-speed torque and RPM on the spec sheet, and compare battery watt-hours instead of marketing labels. If the numbers hold up, the drill will probably perform as advertised. If the claim depends on a vague baseline, treat it as a guess until you test it. The same logic carries over to other cordless fastening tools: high-torque impact wrench selection follows the same torque ratings, brushless motor, and cordless fastening performance questions.

Numbers matter, but so does the tool’s behavior in your hand. Balance, trigger response, chuck feel, and vibration all shape whether a drill gets used or stays in the truck. A spec sheet that looks strong on paper should be confirmed by a few minutes of actual drilling before the purchase.

Final checklist before purchase:

1. Identify the comparison baseline behind every claim
2. Confirm the pack’s voltage and cell count
3. Compare low-speed torque, not marketing multipliers
4. Check that the RPM ranges fit your drilling tasks
5. Verify battery capacity in watt-hours
6. Test the drill with the actual bits and fasteners you use