PowerSmart
PowerSmart 40V 21-Inch Cordless Lawn Mower: Complete Specifications
The PowerSmart 40V 21" Cordless Lawn Mower delivers capable battery-powered performance across lawns up to 1/4 acre, backed by two 40V 4.0Ah batteries that effectively double your runtime without stopping to recharge. Its 21-inch steel deck cuts a wider path than most entry-level cordless competitors, and the push-button start eliminates the frustration of pull cords.
This is a strong fit for suburban homeowners with flat to gently rolling yards who want the convenience of battery power without sacrificing cutting width.
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Last updated: . Based on our analysis of 364 lawn mowers.
What Sets It Apart
Key specification highlights based on our analysis.
21.0-Inch Cutting Deck
Wide cutting path reduces passes (walk-behind avg: 18.0 in)
Steel Cutting Deck
Durable steel deck for long-term use
Why We Recommend It
- 01.
Two 40V 4.0Ah batteries included in the box , swap mid-mow for uninterrupted coverage of up to 10,890 sq ft
- 02.
21-inch cutting deck is 3 inches wider than the 18-inch walk-behind average, meaning fewer passes on every lawn
- 03.
Steel deck construction offers durability that outlasts plastic alternatives on the same entry-level
- 04.
Push-button start and no-cord ignition make setup and operation fast, even for first-time owners
- 05.
Zero direct emissions and quieter operation than gas mowers , a genuine advantage for eco-conscious users and noise-sensitive neighborhoods
Considerations
- 01.
At 56.4 lbs, it's on the heavier end for a push mower , users without self-propelled assist will feel it on larger or uneven lawns
- 02.
Rear-bag-only discharge limits flexibility; no mulching or side-discharge option listed, which may frustrate users who prefer to leave clippings on the lawn
- 03.
Battery life receives mixed user feedback , while two batteries help, heavy grass or thicker lawns may exhaust both before finishing larger 1/4-acre properties
Technical Specifications
| Feature | Specification |
|---|---|
| Mower Type | Push |
| Power Source | Battery |
| Cutting Width | 21" |
| Deck Material | Steel |
| Blade Type | Rotary |
| Cutting Height | 1.5" – 3.9" |
| Height Positions | 6 |
| Battery | 40V 4Ah |
| Discharge | Bag |
| Weight | 56.4 lbs |
| Start Type | Push button |
| Warranty | 2 years |
Power & Performance
The 40V platform delivers enough torque for healthy, regularly maintained grass on lawns up to 10,890 sq ft. It handles standard suburban turf confidently, though very thick or overgrown grass will draw more power and reduce runtime per charge. The dual-battery setup is the real performance advantage here , swapping to a fresh battery mid-mow means you're rarely limited by a single charge cycle.
Cutting System
The 21-inch steel rotary deck is a meaningful upgrade over the 18-inch decks common in this tier, cutting 17% more grass per pass and reducing total mowing time. Six cutting height positions span 1.5 to 3.9 inches and are controlled by a single lever, making adjustments quick between mowing sessions.
Clippings are directed to a rear collection bag , a clean setup for lawns where a tidy finish matters.
Drive & Handling
This is a push mower, so all forward propulsion comes from the operator. At 56.4 lbs, it's manageable on flat ground but will require more effort on inclines compared to a self-propelled model.
Customers consistently praise its maneuverability and lightweight feel relative to gas alternatives, making it easy to navigate around trees, garden beds, and tight corners.
Battery / Fuel
The mower ships with two 40V 4.0Ah lithium-ion batteries and a charger , a genuine value inclusion that eliminates additional purchase investment. One battery typically covers a smaller yard; the second provides backup for full 1/4-acre coverage or denser grass conditions.
As with all battery-powered mowers, runtime shortens in tall or wet grass, so keeping both batteries charged before a session is good practice.
Who Is This Mower For?
Ideal For
- ✓ Homeowners with flat yards up to 1/4 acre (10,890 sq ft) who want full cordless coverage with two batteries so runtime is never a bottleneck
- ✓ Eco-conscious users wanting zero direct emissions and quieter operation compared to gas-powered alternatives
- ✓ Low-maintenance seekers who want to skip oil changes, spark plug replacements, and fuel system upkeep entirely
- ✓ Buyers replacing an aging gas push mower who want a simple push-button start and familiar walk-behind feel without the gas hassle
Not Ideal For
- ✕ Owners with hilly or steep terrain , the 56.4 lb push-only design offers no self-propelled assist, making slopes physically demanding
- ✕ Large property owners over 1/4 acre who need sustained, uninterrupted runtime that two 4.0Ah batteries may not fully cover in dense or tall grass
- ✕ Users who prefer mulching or side discharge to return nutrients to the lawn , the rear-bag-only setup doesn't accommodate those preferences
Customers consistently report straightforward assembly with clear instructions and minimal time from box to first mow. The push-button start means there's no complicated priming or choke procedure to learn.
Charge both batteries fully before your first mow to establish a complete runtime baseline and have the backup ready to go
Set the cutting height one position higher than you think you need for the first pass on an overgrown lawn , it reduces motor strain and protects battery life
PowerSmart includes a 2-year overall warranty with 2-year service coverage and lifetime tech support , a notably generous support package for a battery-powered mower in this category. Verify specific coverage terms with PowerSmart directly at point of purchase, as warranty conditions can vary by retailer.
FAQ
How long does the battery last on one charge?
Runtime per battery varies based on grass conditions, but the 40V 4.0Ah batteries are rated to handle up to 1/4 acre total when both are used. In standard conditions, one battery covers roughly half that area; the included second battery lets you finish without waiting for a recharge.
Thick or wet grass will reduce runtime on each battery.
Does the PowerSmart 40V mower come with batteries, or do I need to buy them separately?
Two 40V 4.0Ah batteries and a charger are included in the box , no separate purchase needed. This is a meaningful value advantage over competitors that sell batteries separately and can significantly inflate the real investment.
Can this mower handle a 1/4-acre lawn?
Yes , PowerSmart rates this mower for lawns up to 10,890 sq ft, which is approximately 1/4 acre. Customer feedback confirms it handles this size comfortably when both batteries are used.
For best results, mow regularly so grass stays at a manageable height and battery draw stays consistent.
Is the PowerSmart 40V mower self-propelled?
No, this is a push mower. All forward movement is operator-powered.
On flat lawns this is straightforward, but the 56.4 lb weight may become noticeable on sloped or uneven terrain. If you have hills, consider a self-propelled model instead.
Does it mulch clippings or only bag them?
The listed discharge method is rear bagging only. There is no mulching or side-discharge function noted in the specifications.
If returning clippings to the lawn as natural fertilizer is important to you, this model may not meet your needs and you should look for a 3-in-1 discharge mower.
How does this compare to a gas mower for maintenance?
Battery-powered mowers like this one require significantly less maintenance than gas models , there are no oil changes, spark plug replacements, air filter cleanings, or fuel stabilizer concerns. The push-button start also eliminates pull-cord frustration.
Primary maintenance involves keeping the blade sharp and the deck clear of clippings after each use.
Bottom Line
The PowerSmart 40V 21" Cordless Lawn Mower is a well-specified, low-hassle choice for flat suburban lawns up to 1/4 acre. The dual-battery inclusion, wide steel deck, and genuine low-maintenance operation make it easy to recommend in this tier.
Heavier push mower users and those with hilly terrain or a preference for mulching will want to look elsewhere.
Best for flat suburban yards up to 1/4 acre where battery-powered convenience, easy push-button start, and zero gas maintenance are the priority.
Consider alternatives if you have steep hills requiring self-propelled assist, a yard over 1/4 acre, or want mulching discharge instead of rear bagging.
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