A teaser campaign for a 22-volt cordless platform, promising new tools to be announced at an influencer event, would not have raised eyebrows twenty years ago. What made this one different was the tool list: a cordless jackhammer, a rotary hammer, a tamper, and a coring drill, tools that have traditionally been corded, pneumatic, or hydraulic. The expansion reflects a broader shift in how crews select professional hand tools, multi-tools, and cordless power systems for the job site.
The company behind the teasers built its reputation on concrete and masonry equipment, so the move into cordless versions of its heaviest tools says something about where battery technology has arrived. The same platform also gains high-capacity packs, including 9 amp-hour and 13.5 amp-hour batteries built around tabless cells. This article covers why heavy tools stayed corded so long, what the new battery chemistry changes, and how to decide between corded, cordless, and pneumatic power for concrete work.
Why Heavy Tools Stayed Corded for So Long
Breaking concrete and driving anchors demands sustained power that early batteries could not deliver. A corded rotary hammer draws continuous current at full load for hours, while an early cordless equivalent ran out of energy after a few minutes of real work. Energy density, the amount of energy stored per kilogram of battery, was the limiting factor, and it improved only slowly for decades.
Smaller tools went cordless first, and that pattern still guides expectations. Compact cordless tools such as palm nailers, hammer drills, and multi-tools proved the platform on light-duty cycles before the heavy hitters followed. Each category moved when its power draw fit inside the battery envelope of the time.
Pneumatic tools solved the power problem with an air compressor, and hydraulic tools solved it with a power unit, but both drag hoses and generators across the site. Cordless tools trade a little peak power for total freedom of movement, which is why crews accept the trade-off once a battery lasts through a meaningful work cycle.
Power Sources Compared
| Power source | Strength | Weakness |
|---|---|---|
| Corded | Unlimited runtime | Needs the grid or a generator |
| Pneumatic | High power, rugged tools | Compressor, hoses, noise |
| Hydraulic | Extreme sustained power | Power unit, hoses, maintenance |
| Cordless | Mobility, no hoses | Runtime, battery cost |
The comparison explains why concrete tools were the last to go cordless: they sit at the high-power end of the table, where every watt of battery capacity costs weight and money.
Battery Chemistry Is the Real Story
The new generation of high-capacity packs changes the runtime math. A 13.5 amp-hour battery stores roughly two and a half times the energy of a 5.5 amp-hour pack at the same voltage, which is the difference between a few minutes of hammering and a full work cycle. Runtime claims only make sense against the actual draw of the tool.
Tabless cell construction is the quieter part of the story. Traditional cells route current through a thin tab welded to the cell, which resists current flow and heats up under load. Tabless designs connect the current collector across the whole end of the cell, lowering resistance, reducing heat, and allowing faster charging and higher sustained discharge. That is exactly what a jackhammer or rotary hammer demands.
Charging speed matters as much as capacity on a busy site. A fast charger can refill a depleted pack during a break, which lets a two-battery crew run a heavy tool through the day. Crews that plan charging into the shift schedule get more work out of fewer packs than crews that charge whenever a tool dies. Packs built for high discharge also need chargers that can push current without overheating the cells, another reason the charger is part of the platform decision, not an afterthought.
Reading Battery Specs
- Voltage sets the tool class; 22-volt-class platforms are the current mainstream.
- Amp-hours estimate runtime; doubling the amp-hours roughly doubles the runtime at the same draw.
- Cell type matters: tabless cells sustain high discharge with less heat.
- Charger output in watts determines how fast a pack refills.
Which Heavy Tools Are Going Cordless
The teaser list reads like a concrete contractor’s wish list: a jackhammer, a rotary hammer, a tamper, a coring drill, and masonry cutting tools. Each one has a different power profile. A rotary hammer drills and chips in short bursts, a jackhammer runs continuous high-impact loads, a tamper delivers repetitive strikes with pauses between them, and a coring drill spins a diamond bit under water feed. The battery and motor must be sized to the profile, not just to the tool name.
Specialty tools have followed the same path. The move from cordless drywall cut-out tools to other specialty power tools shows how quickly battery power absorbs tasks that once seemed too niche for cordless. Tool balancers, another recent addition to the platform, reduce the physical load of hanging a heavy tool all day, which matters more as battery weight pushes tool mass up.
The practical pattern: any tool used in short, repeated bursts with idle stretches between them is a good cordless candidate, while tools that run at full load for hours stay corded or pneumatic.
Cordless Candidate Checklist
- Short duty cycles with pauses between operations.
- Work locations far from outlets and compressors.
- Crews already running the same battery platform.
- One battery covering a realistic work cycle.
Weight, Power, and Runtime Trade-Offs
The trade-off that never disappears is weight. A bigger battery means more runtime and more mass on the tool, and a cordless jackhammer with a 13.5 amp-hour pack weighs noticeably more than its corded equivalent. Brushless motors help by delivering more power per unit of weight and running cooler, which is why serious cordless platforms are brushless across the board.
The honest evaluation of compact cordless tools, brushless motors, and size versus power comes down to matching the motor and battery to the material and the shift length. A tool that feels fine in a five-minute demo can wear a crew out in an afternoon of overhead work.
Ergonomics matter as much as specs. A balancer takes dead weight off the operator’s arms, and a well-placed handle changes how long a crew can work before fatigue sets in. Testing a tool with a full battery before buying is the only honest way to judge the weight.
Weight Management on Site
- Use a balancer or support arm for overhead and long-duration work.
- Carry spare batteries instead of one oversized pack.
- Rotate operators on heavy tasks.
- Match the battery to the task: a small pack for light work, a big pack for heavy runs.
What the Expansion Means for Job Site Planning
As heavy tools join cordless platforms, site planning changes. Charging stations become part of the daily setup, crews carry spare packs the way they once carried extension cords, and fleet decisions start with the battery system rather than the individual tool. The runtime gains of the new generation of brushless cordless tools are large enough that some crews leave the generator at the yard for light demolition days.
Platform economics favor standardization. One battery system shared across drills, saws, and now heavy tools spreads the cost of high-capacity packs across more tools, and every additional tool on the same platform avoids a second charging ecosystem. It also simplifies training, because operators learn one battery routine instead of one per brand. The break-even point for a contractor is the number of tools already on the platform.
Planning Questions for the Fleet
- Which tasks run longer than one battery charge?
- Where will charging happen on site?
- How many high-capacity packs does the crew actually need?
- Does the new heavy tool share batteries with existing tools?
Matching the Power Source to the Job
A cordless jackhammer does not make the corded version obsolete. The decision framework stays the same: cordless for mobility and short cycles, corded for continuous full-load runs near power, and pneumatic or hydraulic for the heaviest sustained work. A practical comparison of corded versus cordless tools helps crews match the power source to the job instead of defaulting to whatever is newest.
A Field Decision Checklist
- Estimate the duty cycle: minutes of full load per hour.
- Measure the distance from power and air.
- Count the tools that would share the battery platform.
- Price the batteries and charger, not just the tool.
- Test the weight with a full battery before buying.
Battery platforms will keep absorbing heavier tools as cells improve, and the practical questions stay the same. Power source selection is a cost and logistics decision, and the right answer depends on the job, not the marketing. Crews that answer the checklist before a purchase tend to own fewer chargers, fewer spare parts, and fewer tools that sit unused.