Cordless Tool Buying Guides

Five guides to the decisions that specifications alone do not settle. Each one takes a number you will meet on a tool shelf, explains what it is actually measuring, and says how much weight it can carry when you compare two tools with it.

Start with the number that misleads you most

Cordless tools are sold on four figures — torque, voltage, amp-hours and a brushless badge — and every one of them is routinely read to mean something it does not. Torque is measured by methods that are not required to be disclosed. Voltage is printed under two different conventions that differ by 10%. Amp-hours describe a pack and not a tool. Brushless describes a motor and not an outcome.

These guides are the counterweight. They are not product recommendations and they contain no rankings; the category baselines live on the comparison pages under each hub.

How to Read a Torque Rating

Hard joint against soft joint, fastening torque against nut-busting torque, and the unit conversion that quietly ruins cross-brand comparisons. The single least comparable figure printed on a cordless tool.

Voltage and Amp-Hours Explained

Why 20V MAX and 18V usually describe the same pack, what watt-hours are and why nobody prints them, and which of the two numbers actually predicts how long you will be working.

Brushless vs Brushed

What removing the brushes changes mechanically, where the efficiency gain shows up, and the usage threshold below which paying for it buys you very little.

The Cost of Platform Lock-In

Your first cordless tool is a decision about your next five. What the commitment consists of, where it binds hardest, and the two points at which running a second platform is the rational choice.

Cordless vs Corded for Outdoor Power

The one category where the cordless answer is not automatic. Runtime against area, pack cost against extension cord, and the specification that decides it.

What these guides deliberately do not do

They do not tell you which tool to buy. We do not own the tools we write about, we do not test them, and a recommendation would be an opinion wearing the costume of a finding. What we can do is make the specifications legible, so that a decision you make on them is made with the caveats visible.

They also carry no prices. Prices on a retail listing change weekly and any figure written into a page is stale before it is indexed. Where cost is genuinely part of the argument — as it is in the platform lock-in guide — it is expressed as relative cost and as the structure of the commitment rather than as a dollar figure.

Where to go next

Drills & Drivers — the four mechanisms that share the category, and the one you should buy first
Saws — blade diameter, depth of cut, and why the category median is smaller than you expect
Outdoor Power Equipment — where pack capacity stops being optional
Battery Platforms — voltage classes and the arithmetic of the commitment
Measuring & Layout — the tools that decide where the holes go
Comparison Methodology — how these pages are built and what we refuse to publish

What these guides are for

Each of these answers a question that comes before choosing a tool: what a specification actually promises, which of two similar-sounding options does the job, and what the number on the box is measured under. They are written from the same corpus as the comparison pages, so where a guide says a specification is rarely published, that is a count across the listings rather than an impression.

The pattern across every guide here

The recurring finding is that the specifications buyers are told to compare are the ones manufacturers publish least. Brushless status appears on around a fifth of the listings in this corpus. Torque appears on fewer still. Amp-hours are given on well under half. Meanwhile every listing carries a voltage and a price. The comparison that is easy to make is rarely the comparison that decides anything, which is why these guides exist separately from the product pages.

Start with the platform, not the tool

The first cordless tool bought is a decision about batteries as much as about the tool, and every purchase afterwards is constrained by it. Switching platforms later means replacing chargers and batteries that are frequently worth more than the tools they power. That makes the platform question the one worth answering carefully and first, and it is the subject of its own guide here for that reason.

What this site cannot tell you

These pages compare published specifications and nothing else. Nothing here has been tested, run under load, or measured independently. Where a specification is missing from a listing this site prints not stated rather than estimating it, and the frequency of that phrase in a category is itself a finding worth reading.

Why medians rather than averages

A single mis-typed specification moves an average and barely moves a median, and product listings contain enough errors for that to matter. Class figures here also exclude values far outside the normal range for their class, so one listing with a decimal point in the wrong place cannot shift the number everything else is measured against. It is a duller statistic than an average and a considerably more honest one.

Reading a category by what it does not publish

The most useful signal on this site is often an absence. A category where every listing states a figure is one where manufacturers expect to be compared on it. A category where almost nothing appears is sold on brand, photographs and price instead — and that is worth knowing before spending an evening trying to compare two of them on paper. The specification tables here are as informative where they are empty as where they are full.

Where a guide here disagrees with a manufacturer

Manufacturer copy describes what a tool can do under conditions chosen to show it well, and these guides describe what the specifications say across a whole category. The two diverge most where a figure is a maximum rather than a typical value — a peak torque, a no-load speed, a battery capacity quoted at its most flattering. Where this site and a listing disagree, the listing is usually right about that tool and this site is usually right about what the category typically delivers, and it is worth being clear which of those questions you are asking.