Volts, amp-hours & platforms
Volts, amp-hours & platforms
What the numbers on the box mean and which battery size fits the job.
Volts, amp-hours & platforms
Volts tell you how much muscle a tool has. Amp-hours tell you how long it runs. They are two different numbers, and buying more of the wrong one is the most common mistake.
| Voltage | Typical use | Good to know |
|---|---|---|
| 4V / 8V | Screwdrivers and detail rotary tools | Furniture assembly and cabinet hardware |
| 12V | Compact drills and drivers | Light, one-handed, great inside cabinets and panels |
| 18V / 20V MAX | The everyday homeowner and pro platform | Same battery, different marketing name — drills, saws, sanders |
| 40V / 60V+ | Outdoor power and heavy cutting | Mowers, blowers, chainsaws and big miter saws |
| Corded (amps) | Continuous-duty work | 7–15 amps; no runtime limit, no battery to charge |
Batteries & runtime
2.0 Ah compact
Light drilling and driving. Keeps a tool balanced for overhead and ladder work.
4.0 / 5.0 Ah
The all-around size. Enough for a deck day with a second pack on the charger.
8.0 Ah+ high output
Saws, grinders and high-draw tools. Heavy — you'll feel it on a drill.
Fast charger
Rotate two packs and you never stop working. Worth more than a third battery.
Bare tool
Tool only, no battery or charger. Cheapest way to grow a platform you already own.
Bring your battery in and we'll tell you what else runs on it — there's no reason to own three chargers.