Cordless chainsaws have come a long way in just a few seasons, and the 40-volt brushless category is where most homeowners and acreage owners land these days. Brushless motors, in plain terms, use electronic controllers instead of carbon brushes, which gives you more torque, longer runtime per charge, and noticeably less motor wear. You skip the gas-and-oil ritual, the pull-cord tantrum, and most of the noise.
What follows is a curated ten-pack of 40v brushless chainsaws and related gear, mixing full-size 16-inch and 18-inch workhorses with smaller handheld pruning saws and a replacement chain set for when your bar eventually dulls. Every pick uses an existing DeWalt or Milwaukee battery pack, ships as a bare tool, or comes bundled with its own batteries, so you can match the saw to the platform you already own.
A Snapshot Of The Selections
DEJUNPIOOL 6 & 8 Inch Mini Chainsaw for Dewalt 20V Battery
RAPKEY Mini Chainsaw for Dewalt 20V Battery, 8-Inch & 6-Inch Brushless
RAPKEY 3-Pack 8-Inch Replacement Chains, 46 Drive Links
DEJUNPIOOL Mini Chainsaw for Milwaukee M18 18V Battery
RAPKEY Mini Chainsaw for Milwaukee M18 Battery, 8-Inch & 6-Inch
SEYVUM 40V 16-Inch Cordless Brushless Chainsaw, 2000W
DeForce 16-Inch 40V Brushless Chainsaw for DeWalt 20V Max Batteries
SEESII 40V 18-Inch Cordless Brushless Chainsaw with 2x 5.0Ah Batteries
DEJUNPIOOL 16-Inch Brushless Chainsaw for Dewalt 20V/60V MAX Battery
AIDERAR 40V 16-Inch Brushless Chainsaw for DeWalt 20V Battery
Taking A Closer Look At The Options
If you already own a drawer full of DeWalt 20V packs, this little brushless pruning saw slides straight into your routine without dragging you to the charger every five minutes. The DEJUNPIOOL 6 & 8 Inch Mini Chainsaw ships with both bar sizes, so you can swap from tight hedge-and-limb work to slightly bigger branches without buying a second tool.
It’s the kind of saw you grab for storm debris, low-hanging limbs, or knocking back an overgrown shrub rather than bucking firewood. Anyone with a smaller yard who wants to put their existing DeWalt batteries to work will feel right at home here.
The Case For It
- Two bar sizes in one package, so you can cover both delicate pruning and thicker limbs
- Brushless motor runs cooler and sips battery compared to older brushed designs
- Auto-oiler keeps the chain from binding up during longer trimming sessions
- Handheld form factor reaches into the rose bush without the bulk of a full-size saw
Things To Consider
- Bare-tool only, so you’ll need DeWalt 20V batteries on hand to start
- An 8-inch bar limits you to smaller branches; bigger trunks are out of reach
Whose Shelf It Belongs On
DeWalt-owning homeowners handling light pruning, hedge shaping, and storm debris in a typical suburban yard.
Reach For A Different Pick When
The AIDERAR 40V 16-Inch Brushless Chainsaw suits you better if your projects run toward firewood and full-size limbs rather than tidy-up work.
Where the DEJUNPIOOL pick leans on dual-bar flexibility, this RAPKEY version aims squarely at the first-time cordless user. The Mini Chainsaw for Dewalt 20V Battery runs on the same DeWalt packs many DIYers already keep on a shelf, which keeps the entry cost contained.
It’s a friendly size for anyone who has hesitated to fire up a full-size chainsaw. Reach for it when the ladder feels too risky and the manual pruners feel too slow, which in most backyards is exactly the sweet spot.
Where It Excels
- Brushless motor gives beginners the smoother, easier-to-control cut of a modern design
- Auto-oiler reduces the chance of a dry-chain jam mid-cut
- Swappable bar sizes let you start gentle and work up as confidence grows
Points To Note
- No battery in the box, so brand-new DeWalt shoppers need to budget for a starter pack
- Smaller bar length makes the saw poorly suited to felling or firewood duty
Key Specs
Best Suited To
DeWalt platform newcomers who want a low-pressure way to handle yard cleanup without learning a full-size saw.
Look Elsewhere When
You handle storm cleanup with trunks thicker than your forearm; the SEYVUM 40V 16-Inch Cordless Brushless Chainsaw covers that ground more comfortably.
No matter how good the saw, the chain is the part that wears out. The RAPKEY 3-Pack 8-Inch Replacement Chains, 46 Drive Links is the unsexy but genuinely useful accessory that keeps the smaller picks in this list from going dull during a long weekend.
Three chains mean you can rotate, sharpen on your own schedule, and stash a backup. For most homeowners, a sharp spare saves the day when a hidden nail or a dusty oak hits mid-cut.
The Practical Payoff
- Three-pack pricing keeps your cost per chain reasonable
- Standard 46-drive-link fit for many 8-inch cordless mini saws
- 1/4LP pitch suits low-kickback pruning bars commonly used on handheld chainsaws
Worth Noting
- Only fits chainsaws using the 46-link, 1/4LP configuration, so check your existing saw first
Made For
Owners of 8-inch cordless mini chainsaws who want a ready supply of fresh chains on the shelf.
A Better Fit Elsewhere
You only own a full-size 16 or 18-inch bar; the SEESII 40V 18-Inch Cordless Brushless Chainsaw or the DeForce 16-Inch 40V Brushless Chainsaw use a different chain size entirely.
Milwaukee shops get their own version of the DEJUNPIOOL concept, and this Mini Chainsaw for Milwaukee M18 18V Battery makes the most sense if your garage is already a sea of red and black. It’s a compact pruning saw with both 6-inch and 8-inch bars plus four spare chains in the box.
That stash of extra chains, two 6-inch and two 8-inch, is the kind of detail that pays off the first time you nick a rock and need to swap rather than stop. For tradespeople and serious DIYers, that matters.
Features That Help
- Spare chains included, so you’re not sidelined by a dull edge
- Auto-oiler reduces chain wear on longer pruning sessions
- Brushless motor plays nicely with high-output M18 packs
Trade Offs
- Bare-tool only, so M18 batteries and a charger are required
- Small bar size means it stays in the pruning lane rather than firewood
- M18 compatibility locks out users on other battery platforms
Feature Snapshot
The Right Fit
Milwaukee M18 owners who already keep a stack of packs in the truck and want a pruning saw to match.
Not Your Match When
You’re a DeWalt-only household; the DEJUNPIOOL 6 & 8 Inch Mini Chainsaw for Dewalt 20V Battery slides into your lineup instead.
Safety gets top billing on this RAPKEY Mini Chainsaw for Milwaukee M18 Battery. The two-step start, with a safety lock that has to be pressed before the trigger, is the kind of detail that quietly prevents a lot of garage and yard mishaps, particularly for newer operators.
The extended protective baffle keeps sawdust and chips from spraying back toward your face. In a busy yard with kids, pets, or a helper holding the ladder, that extra coverage feels reassuring.
What Pays Off
- Two-step safety lock reduces accidental startup during handling
- Extended chip baffle shields the user from flying debris
- Auto-oiler and brushless motor for steady cutting and long motor life
Points To Keep In Mind
- M18-only compatibility rules out other battery platforms
Perfect Match For
Households where multiple people will handle the saw, including less-experienced family members or neighbors borrowing it.
Where Another Pick Suits Better
You want a much bigger bar for real tree work; the SEESII 40V 18-Inch Cordless Brushless Chainsaw brings a longer reach to the platform-friendly table.
The first full-size saw in this lineup, the SEYVUM 40V 16-Inch Cordless Brushless Chainsaw, swaps the dainty pruning profile for genuine yard muscle. The 2000W brushless motor and 16-inch bar are designed for felling small trees, bucking firewood rounds, and cleaning up after a windstorm.
It runs on its own 40V battery system rather than borrowing from a third-party platform. For shoppers who don’t already have a pack collection, that one decision simplifies the upgrade path, though it does mean you commit to SEYVUM’s charger.
What Stands Out
- 2000W brushless output handles thicker logs than any of the mini saws above
- Self-contained 40V platform means no reliance on another brand’s batteries
- Longer bar reaches deeper into branches without repositioning the ladder
Honest Caveats
- Heavier and longer than a handheld pruning saw, so expect two-handed control
- Owners commonly report that you need to top off bar oil before each session
Feature Card
Right Fit For
Homeowners ready to retire a noisy gas chainsaw and take on real tree and firewood work without cord pull-starts.
Skip It When
Your work stays light and high; the DEJUNPIOOL 6 & 8 Inch Mini Chainsaw for Dewalt 20V Battery is lighter on the arm and on the budget.
The DeForce 16-Inch 40V Brushless Chainsaw borrows a trick from the full-size world: it runs on two DeWalt 20V Max packs wired together to create a 40V tool. For owners with stacks of DeWalt batteries already in rotation, that means a full-size bar without buying a new charger platform.
It’s also a confident tool for storm cleanup, fallen limbs, and serious firewood sessions. With an auto-oiler onboard, the chain stays lubricated through longer cuts, so you can focus on the wood instead of the tool.
A Favorable Mix
- Uses two existing DeWalt 20V packs rather than a proprietary 40V battery
- Tool-free chain adjustment speeds up tensioning in the field
- Auto-oiler extends chain life during heavy cutting
Small Caveats
- Requires two matched DeWalt packs to run, so single-battery owners need a spare
- Heavier than a pruning saw and worth both hands for safe control
Built With In Mind
DeWalt 20V owners stepping up from a mini chainsaw to full-size wood cutting without buying a new battery system.
Consider Something Else When
You need batteries included and ready to go; the SEESII 40V 18-Inch Cordless Brushless Chainsaw ships with two 5.0Ah packs in the box.
The SEESII 40V 18-Inch Cordless Brushless Chainsaw is the most complete package on this list. The 18-inch bar is the longest in the roundup, and two 5.0Ah batteries ship in the box, so you can run, swap, and keep cutting without any third-party battery collection.
It’s pitched at folks who want a one-stop replacement for a gas saw. Acreage owners, cabin caretakers, and anyone new to the cordless world will appreciate the all-in approach, even if the upfront cost is higher than a bare tool.
A Strong Showing
- Two 5.0Ah batteries included for real back-to-back cutting sessions
- 18-inch bar handles larger trees and thicker logs than 16-inch models
- Brushless motor with high chain speed for dense hardwood
Worth Bearing In Mind
- Larger bar and bundled batteries add weight to the kit
- Committed to SEESII’s battery platform for future upgrades
Quick Facts
Who Should Grab It
Shoppers without an existing battery platform who want the longest bar and a ready-to-run kit in one purchase.
A Better Fit Elsewhere
You already own DeWalt 20V batteries; the DeForce 16-Inch 40V Brushless Chainsaw makes better use of what you have.
For the DeWalt household that juggles both 20V and 60V packs, this DEJUNPIOOL 16-Inch Brushless Chainsaw accepts either flavor. The on-board battery level screen is a small but welcome feature, letting you check remaining charge before you climb the ladder rather than after.
Three spare chains in the box mean you can rotate, sharpen, and swap without a separate parts order. For homeowners who already trust the DeWalt platform, it slots in cleanly.
Useful Touches
- Works with both DeWalt 20V and 60V MAX batteries, adding flexibility
- Battery level screen shows remaining charge at a glance
- Three chains included so a dull edge won’t end your day
Practical Considerations
- Bare-tool only, so batteries and charger must come from your existing stash
- Limited to DeWalt pack compatibility, locking out other platforms
Feature Rundown
The Right Fit
DeWalt homeowners with mixed 20V and 60V packs who want one chainsaw that pulls from either shelf.
Reach For A Different Pick When
You prefer a kit that ships with its own batteries; the SEESII 40V 18-Inch Cordless Brushless Chainsaw bundles two packs and a charger.
The AIDERAR 40V 16-Inch Brushless Chainsaw rounds out the list with another clever play on existing batteries. It runs on two DeWalt 20V packs wired into a 40V tool, similar to the DeForce above, but pitched to shops with a tall stack of older batteries collecting dust on a shelf.
The 16-inch bar is a comfortable all-rounder size. For a workshop already invested in DeWalt, this is a smart way to put dormant packs back on the rotation.
A Few Strong Suits
- Revives dormant DeWalt 20V packs as a 40V power source
- 16-inch bar fits both firewood and tree-limbing tasks
- Brushless motor with low-voltage protection for the packs
Less Ideal Details
- Requires two matched, healthy DeWalt batteries to perform as advertised
- Bare-tool format means first-time shoppers need a separate starter kit
Who Will Love This
Workshop owners with surplus DeWalt 20V batteries who want a full-size chainsaw without buying a new platform.
Swap It Out When
You have no DeWalt batteries on hand at all; the SEESII 40V 18-Inch Cordless Brushless Chainsaw arrives ready to cut out of the box.
Matching The Right Saw To Your Yard
Picking a 40v brushless chainsaw comes down to three honest questions: what size wood are you cutting, which battery platform do you already own, and how often you’ll actually use it. Bar length is the headline number, since an 8-inch pruning saw simply can’t reach firewood rounds and a 16-inch bar feels clumsy above a rosebush.
The next decision is battery platform. Brushless motors are more efficient than older brushed designs, but a brushless saw is only as good as the pack feeding it. Shoppers deep into DeWalt or Milwaukee should lean into compatible bare tools. Shoppers with no battery collection will save hassle by buying a kit with batteries included, like the SEESII 40V 18-Inch model.
Safety features matter more than most people realize. A two-step safety lock and an extended chip baffle, like those on the RAPKEY Milwaukee mini saw, reduce the chance of an accidental startup or a face full of debris. Worth the read on any spec sheet.
Chain speed, often quoted in feet per second, predicts how cleanly a saw cuts dense wood. Higher chain speed means less operator effort per cut, which compounds over a long day. Wood species also matters; clean pine cuts far easier than dry, knotty oak, regardless of motor wattage.
Key Considerations Across These Picks
Common Shopping Slip Ups
The biggest mistake is buying a bar length that doesn’t match your real workload. Mini chainsaws are easy to over-romanticize; they’re wonderful for hedges and small limbs and a poor match for firewood. Equally common is grabbing a bare-tool saw without checking that you already own compatible batteries in good health. Match the tool to your existing ecosystem first, then size up the bar and chain speed.
What Separates Premium From Basic
Higher-tier 40v brushless chainsaws earn their place with stronger brushless motors, longer bars, and bundled battery kits with higher amp-hour ratings. More amp-hours translate directly to longer runtime per charge, which matters on a woodlot afternoon. Auto-oiling and tool-free chain tensioning are small conveniences that show up in every long session, and premium kits typically include spare chains so a dull edge is a five-second swap rather than a trip back to the garage.
Frequently Asked Questions
Are 40v brushless chainsaws powerful enough to replace a gas chainsaw?
For most homeowner tasks, including limbing, firewood bucking, and small-tree felling, a 40v brushless chainsaw delivers cutting performance comparable to a small gas saw. Hardwoods and very large trunks still favor gas, but the cordless gap has closed dramatically.
How long does a 40v battery typically last per charge?
Runtime depends on the amp-hour rating of the pack and the wood being cut. A 5.0Ah battery generally handles a moderate session of pruning or a stack of firewood rounds before needing a swap.
Can I use one brand’s battery on another brand’s 40v chainsaw?
Most bare-tool chainsaws are designed around a specific platform. A saw marked for DeWalt 20V will not safely accept Milwaukee packs. Stick with the brand match listed by the manufacturer to avoid electrical and fitment issues.
What maintenance does a cordless chainsaw need?
Bar oil, chain tension, and chain sharpness cover most of it. Owners commonly report topping off bar oil before each session and rotating through spare chains to keep a fresh edge on hand at all times.
Is a mini chainsaw enough for storm cleanup?
A 6 or 8-inch mini chainsaw handles small branches quickly but is not a substitute for a 16 or 18-inch bar on trunks thicker than your wrist. For mixed debris, having both sizes on hand is the practical move.
Closing Remarks
The right 40v brushless chainsaw depends less on brand hype and more on the battery packs you already trust and the size of wood you actually face. A pruning saw covers hedges and small limbs, a 16-inch bar handles most firewood and tree work, and an 18-inch kit arrives ready for serious acreage duty. Pick the bar length first, match the battery platform second, and the rest tends to fall into place.