Step 1: Choose your battery platform first
With cordless tools, you are not really buying a drill or a saw — you are buying into an ecosystem of batteries and chargers. Once you own a couple of batteries on a platform, every future tool on that platform is cheaper to add (buy the 'bare tool' and reuse your batteries). Switching platforms later means re-buying batteries, which are the expensive part.
So decide early. Pick a major, widely supported 18V/20V-class platform with a broad tool range that covers what you might want over the next few years — drill, impact driver, saw, sander, and outdoor tools if relevant. A slightly better standalone tool on an obscure platform is usually the wrong long-term call.
Step 2: Corded vs cordless vs the job
Cordless tools have become so capable that, for the majority of homeowners, they are the default. They are convenient, increasingly powerful, and free you from outlets. Choose corded only when you need sustained maximum power for long periods (heavy grinding, big table saws, continuous demolition) where you do not want to manage batteries.
For most drilling, driving, cutting and sanding around a home, modern cordless tools are more than enough — and the convenience genuinely changes how often you use them.
Step 3: Understand brushless motors
A brushless motor has no carbon brushes to wear out. In practice that means more runtime per charge, less heat, more power in a smaller body, and a longer lifespan. The trade-off is a higher price.
Our rule of thumb: if you will use a tool regularly, buy brushless — the efficiency and longevity pay off. For a tool you will touch a few times a year, a brushed version saves money with little real downside.
Step 4: Decode voltage, torque and amp-hours
Three numbers cause most confusion:
- Voltage (18V / 20V MAX) roughly indicates the power class. '20V MAX' and '18V' are marketing variations of the same nominal battery — do not be swayed by the bigger number alone.
- Torque (in-lb or Nm) is the twisting force that drives fasteners and bores holes. It predicts capability better than voltage. (1 Nm ≈ 8.85 in-lb.)
- Amp-hours (Ah) is battery capacity, i.e. runtime. A 4.0Ah pack lasts roughly twice as long as a 2.0Ah pack on the same tool, but weighs more.
Compare torque and real runtime across tools, not headline voltage. A balanced tool with the right torque and a sensible battery beats a spec-sheet champion.
Step 5: Buy the kit or the bare tool?
If you have no batteries yet, buy the kit (tool + batteries + charger). Standalone batteries and a charger often cost nearly as much as a complete kit, so kits are the cheapest way to start. Once you own batteries on a platform, buy bare tools and reuse them — this is where the platform pays off.
Step 6: Mind safety and the extras
Match the tool to the job and respect it: read the manual, use the right bit or blade, wear eye and ear protection, and let a clutch or torque setting prevent overdriving. For electrical safety, look for tools and chargers tested to recognised standards such as those from UL Solutions, and follow general safety guidance from OSHA for power-tool use. Good accessories — quality bits, the right blade, a spare battery — often improve results more than a pricier tool.