Choosing the best 21 inch battery lawn mower is essential for maintaining a beautifully manicured yard with ease. There are various types, including push mowers and self-propelled models, and the 21 inch battery lawn mower deliver powerful performance without the hassle of cords or gas.
A properly fitted 21 inch battery lawn mower in 2026 enhances your lawn care routine by offering quiet operation and eco-friendly power. Designed to match various lawn sizes and terrains, top-rated covers offer convenience and efficiency.
This guide highlights the best 21 inch battery lawn mower to help you choose the right option for your specific lawn care needs and preferences.
10 best 21 inch battery lawn mower
“Before you buy, carefully consider your lawn's size and terrain. If you need a mower for a smaller, flatter yard, a push model might be your best bet. If tackling hills or larger areas is your top concern, invest in a self-propelled mower with a robust battery system and adjustable speed. Always double-check the product listing for your specific battery voltage and run time requirements, and confirm compatibility with any existing tool batteries you may own to avoid compatibility issues.”
best 21 inch battery lawn mower Comparison Table
| Product | Best For | Key Strength | Who It’s For | |
|---|---|---|---|---|
| Greenworks 21 inch battery lawn mower | Best For: Easy Incline Mowing | Key Strength: Self-Propelled Brushless Motor | Who It's For: Greenworks Tool Owners | Check Price |
| Greenworks 21 inch battery lawn mower | Best For: Gas Mower Power | Key Strength: Robust 80V Battery System | Who It's For: Eco-Conscious Homeowners | Check Price |
| EGO Power+ 21 inch battery lawn mower | Best For: Intuitive Operation | Key Strength: Effortless Touch Drive Controls | Who It's For: Noise-Sensitive Users | Check Price |
| Greenworks 21 inch battery lawn mower | Best For: Rapid Recharging | Key Strength: Versatile 3-in-1 Cutting | Who It's For: Cordless Convenience Seekers | Check Price |
| PowerSmart 21 inch battery lawn mower | Best For: Low Maintenance | Key Strength: Dual Battery Runtime | Who It's For: First-Time Mower Buyers | Check Price |
| EGO Power+ 21 inch battery lawn mower | Best For: Extended Runtime | Key Strength: Rapid Charging Capability | Who It's For: Medium Yard Owners | Check Price |
| WORX 21 inch battery lawn mower | Best For: Reducing User Fatigue | Key Strength: Variable Speed Self-Propel | Who It's For: Large Lawn Owners | Check Price |
| EGO Power+ 21 inch battery lawn mower | Best For: Consistent Cutting | Key Strength: Select Cut™ System | Who It's For: Demanding Lawn Care | Check Price |
| UPLUS NEW TECHNOLOGY BATTERY 21 inch battery lawn mower | Best For: Quick Engine Ignition | Key Strength: Maintenance-Free AGM Design | Who It's For: Riding Mower Owners | Check Price |
| WORX 21 inch battery lawn mower | Best For: Medium-Sized Lawns | Key Strength: Single-Lever Height Adjustment | Who It's For: Suburban Homeowners | Check Price |
1. Greenworks 21 inch battery lawn mower – Affordable Pick
For homeowners seeking a powerful yet convenient way to maintain their lawns, the Greenworks 40V 21" Self-Propelled Cordless Lawn Mower presents a compelling option. This model is designed for those who want to ditch the hassle of gas and cords without sacrificing cutting performance. Its self-propelled feature makes tackling inclines and larger yards significantly less strenuous, while the brushless motor ensures efficient power delivery and extended tool life.
What truly sets this Greenworks mower apart is its blend of user-friendly design and robust functionality. The inclusion of a substantial 5.0Ah battery means you can cover a good amount of ground on a single charge, and the compatibility with over 75 other Greenworks 40V tools offers fantastic long-term value and versatility for your entire yard care arsenal. It's an excellent choice for medium to large lawns where ease of use and reliable performance are key.
Key Specifications
| Feature | Details |
|---|---|
| Motor Type | Brushless |
| Cutting Width | 21 inches |
| Battery | 40V 5.0Ah Lithium-Ion |
| Drive System | Self-Propelled |
| Deck Material | Steel |
| Weight | 65 lbs (with battery) |
| Charge Time | Approximately 60 minutes for 80% |
| Features | Mulching, Bagging, Side Discharge |
Reasons to Buy
- Powerful and efficient cutting performance with a brushless motor.
- Self-propelled feature makes mowing easier, especially on inclines.
- Excellent value due to battery compatibility with a wide range of Greenworks 40V tools.
- User-friendly operation with simple starting and height adjustment.
- Quiet operation compared to gas mowers.
Reasons to Avoid
- Runtime may be insufficient for very large lawns (over 1/2 acre) without a second battery.
- Steel deck, while durable, can be heavier than composite alternatives.
2. Greenworks 21 inch battery lawn mower – Best Value
Tired of the hassle of gas-powered mowers? The Greenworks 80V 21" Self-Propelled Cordless Lawn Mower is a fantastic option for homeowners looking for a powerful, convenient, and eco-friendly way to maintain their lawns. This mower is designed to tackle medium to large yards with ease, offering the performance of a gas mower without the fumes, noise, or maintenance headaches. Its self-propelled feature makes mowing less strenuous, and the 21-inch cutting deck covers a good amount of ground with each pass.
What truly sets this Greenworks mower apart is its robust 80V battery system, which delivers impressive power and runtime, and its compatibility with over 75 other Greenworks tools. This means you can invest in a powerful mowing solution and then expand your outdoor power equipment collection without needing multiple battery types. It’s a smart, integrated system that offers excellent long-term value and convenience for anyone looking to streamline their yard work.
Key Specifications
| Feature | Details |
|---|---|
| Motor | Brushless |
| Cutting Width | 21 inches |
| Battery | 80V 4.0Ah Lithium-Ion |
| Drive System | Self-Propelled |
| Deck Material | Steel |
| Features | LED Headlights, Mulching/Bagging/Side Discharge |
| Charger | Rapid Charger Included |
| Runtime | Up to 60 minutes (varies with conditions) |
Reasons to Buy
- Powerful performance comparable to gas mowers without the emissions or noise.
- Excellent value due to the robust 80V battery system and tool compatibility.
- User-friendly operation with easy start, self-propel, and vertical storage.
- Reduced maintenance requirements compared to gas-powered alternatives.
- Versatile cutting options (mulch, bag, side discharge) and helpful LED lights.
Reasons to Avoid
- Runtime may be insufficient for very large lawns without purchasing additional batteries.
- The initial investment, including the battery and charger, can be higher than basic corded electric or smaller gas mowers.
3. EGO Power+ 21 inch battery lawn mower – Premium Choice
For homeowners seeking a powerful, convenient, and eco-friendly way to maintain their lawns, the EGO Power+ LM2125SP Self-Propelled Cordless Lawn Mower stands out as a top-tier option. This electric mower is designed to offer the performance of a gas mower without the noise, fumes, or hassle of fuel and oil. Its self-propelled feature, coupled with intuitive Touch Drive technology, makes tackling even moderate slopes and larger yards a breeze, appealing to those who want a clean cut and an easier mowing experience.
What truly sets the EGO Power+ LM2125SP apart is its blend of robust cutting power, impressive battery life, and user-friendly design. It leverages EGO's advanced 56V ARC Lithium™ battery platform, ensuring ample runtime and consistent power delivery. The innovative Touch Drive system allows for effortless steering and speed control, adapting to your pace and the terrain, making it a compelling choice for anyone looking to upgrade from a traditional push mower or a less capable electric model.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Motor | Brushless DC |
| Drive System | Self-Propelled with Touch Drive Technology |
| Battery | 56V 7.5Ah ARC Lithium™ |
| Charger | Rapid Charger included |
| Deck Material | Steel |
| Mulching Capability | Yes |
| Bag Capacity | 2.2 cu. ft. |
Reasons to Buy
- Significantly quieter operation than gas mowers.
- Effortless self-propelled system with intuitive Touch Drive controls.
- Powerful cutting performance that handles various grass types and conditions.
- Zero emissions for an eco-friendly lawn care solution.
- Compact vertical storage design saves valuable space.
- Reduced maintenance requirements compared to gas engines.
Reasons to Avoid
- Higher initial purchase price compared to basic corded electric or gas push mowers.
- Battery runtime, while good, may require a second battery for very large properties.
4. Greenworks 21 inch battery lawn mower – Budget Friendly
If you're looking for a powerful and convenient way to maintain your lawn without the hassle of gas or cords, the Greenworks 80V 21" Cordless Push Lawn Mower is a fantastic option. Designed for homeowners with medium-sized yards, this mower offers a compelling blend of performance, ease of use, and eco-friendliness. It's ideal for those who want to ditch the pull-start routine and enjoy a quieter, more pleasant mowing experience.
What truly sets this Greenworks mower apart is its robust 80V battery system, which delivers impressive power comparable to gas-powered mowers, but with the convenience of cordless operation. Coupled with its 21-inch cutting deck and user-friendly features like LED headlights and a rapid charger, it aims to make lawn care less of a chore and more of an efficient task.
Key Specifications
| Feature | Details |
|---|---|
| Voltage | 80V |
| Battery | 4.0Ah Lithium-Ion |
| Cutting Width | 21 inches |
| Motor Type | Brushless |
| Deck Material | Steel |
| Weight | 58 lbs (with battery) |
| Charge Time | Approximately 60 minutes (with rapid charger) |
| Features | LED headlights, 3-in-1 mulching, bagging, and side discharge |
Reasons to Buy
- Powerful performance comparable to gas mowers thanks to the 80V system.
- Cordless convenience eliminates the need for gas and oil, with no emissions.
- Rapid charger significantly reduces downtime between mowing sessions.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge).
- Part of a larger 80V tool ecosystem, offering potential for battery sharing.
Reasons to Avoid
- Battery life may be insufficient for very large lawns without a second battery.
- As a push mower, it requires more physical effort than a self-propelled model.
5. PowerSmart 21 inch battery lawn mower – Top Performer
If you're tired of the hassle of gas-powered mowers and the limitations of corded electric models, the PowerSmart 40V 21" Cordless Lawn Mower might be your perfect solution. This mower is designed for homeowners with medium-sized yards, offering the convenience of battery power without sacrificing cutting performance. It's ideal for those seeking a quieter, cleaner, and more user-friendly way to maintain their lawn.
What truly sets this PowerSmart model apart is its robust dual-battery system and a generous 21-inch cutting deck. This combination allows for extended mowing sessions and the ability to tackle larger areas efficiently. Coupled with its user-friendly design and solid construction, it presents a compelling value proposition for anyone looking to upgrade their lawn care equipment.
Key Specifications
| Feature | Details |
|---|---|
| Motor Type | Brushless |
| Cutting Width | 21 inches |
| Battery System | 40V (2 x 4.0Ah batteries included) |
| Charge Time | Approximately 2 hours per battery |
| Deck Material | Steel |
| Height Adjustment | 6-position |
| Weight | 55 lbs |
| Recommended Mowing Area | Up to 1/4 acre |
Reasons to Buy
- Significantly quieter operation than gas mowers.
- No need for gas or oil, reducing emissions and mess.
- Dual battery system provides ample runtime for most yards.
- Easy to start and maneuver, making lawn care less of a chore.
- Low maintenance requirements.
Reasons to Avoid
- May struggle with extremely overgrown or very wet, thick grass.
- Battery life might be insufficient for very large yards exceeding 1/4 acre without additional batteries.
6. EGO Power+ 21 inch battery lawn mower – Recommended
If you're tired of the hassle of gas-powered mowers – the fumes, the oil changes, the pull-starts – then the EGO POWER+ LM2114 is a breath of fresh air for your lawn care routine. This 21-inch cordless electric mower is designed for homeowners who want a powerful, quiet, and eco-friendly way to maintain their yards, especially those with medium to large lawns. It offers the convenience of battery power without sacrificing the performance needed for a well-manicured finish.
What truly sets the EGO POWER+ LM2114 apart is its impressive blend of cutting power, extended runtime, and user-friendly design. It leverages EGO's robust 56V ARC Lithium battery system, providing ample energy to tackle demanding mowing conditions. Combined with its durable construction and thoughtful features like mulching, bagging, and side-discharging capabilities, this mower delivers a premium experience that makes yard work feel less like a chore and more like a breeze.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Battery | 56V ARC Lithium 6.0Ah |
| Charger | 320W Rapid Charger |
| Mowing Functions | Mulch, Bag, Side Discharge |
| Deck Material | Steel |
| Weight | 56.2 lbs (with battery) |
| Run Time | Up to 60 minutes (on a full charge) |
| Charge Time | Approximately 40 minutes (for 6.0Ah battery) |
Reasons to Buy
- Powerful and consistent cutting performance comparable to gas mowers.
- Extended runtime with the 6.0Ah battery, suitable for most yards.
- Rapid charging significantly minimizes downtime.
- User-friendly operation with variable-speed self-propel and easy starting.
- Compact vertical storage saves valuable garage or shed space.
- Significantly quieter operation than traditional gas mowers.
Reasons to Avoid
- Higher initial cost compared to basic gas or corded electric mowers.
- Steel deck, while durable, can be heavier than composite alternatives.
7. WORX 21 inch battery lawn mower – Recommended
If you're looking to ditch the gas can and the hassle of cords for good, the WORX Nitro 21" Self-Propelled Electric Lawn Mower is a fantastic option for homeowners seeking a powerful, convenient, and eco-friendly way to maintain their yards. This mower is designed for those who appreciate the freedom of cordless operation without sacrificing performance, making it ideal for medium to large lawns where a traditional corded mower would be impractical. Its self-propelled nature and intelligent cutting technology aim to make lawn care less of a chore and more of a breeze.
What truly sets the WORX Nitro apart is its blend of robust power, user-friendly features, and the inclusion of everything you need to get started. The dual battery system provides ample runtime, while the variable speed self-propel system adapts to your walking pace, reducing fatigue. Coupled with its durable construction and smart cutting adjustments, this electric mower offers a compelling alternative to gas-powered machines, promising a cleaner, quieter, and more efficient lawn mowing experience.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Motor Type | Brushless |
| Battery System | Dual 20V Power Share PRO (2 x 5.0 Ah batteries included) |
| Drive System | Variable Speed Self-Propelled |
| Deck Material | Steel |
| Mulching/Bagging/Side Discharge | Yes (3-in-1) |
| Charge Time | Approximately 2 hours per battery |
| Weight | 65 lbs (with batteries) |
Reasons to Buy
- Powerful and efficient cutting with Intellicut™ technology.
- Variable speed self-propel system significantly reduces user fatigue.
- Dual 20V 5.0 Ah battery system provides ample runtime for medium to large lawns.
- Tool-free height adjustment and vertical storage design enhance convenience.
- Eco-friendly operation with no emissions and reduced noise pollution.
Reasons to Avoid
- The 2-hour charge time per battery might be a limitation for very large properties if a second set of batteries isn't purchased.
- While durable, the steel deck may be heavier than some composite alternatives for those prioritizing extreme lightness.
8. EGO Power+ 21 inch battery lawn mower – Recommended
If you're tired of the hassle of gas-powered mowers, the EGO POWER+ LM2134SP-2 offers a compelling alternative for homeowners seeking a powerful, convenient, and eco-friendly way to maintain their lawns. This self-propelled cordless mower is designed for those who appreciate cutting-edge technology and a user-friendly experience, making lawn care less of a chore and more of a breeze. Its robust construction and impressive battery performance mean you can tackle medium to large yards with confidence.
What truly sets the EGO POWER+ LM2134SP-2 apart is its combination of intelligent features and robust power. The self-propelled Touch Drive system allows for effortless maneuvering, adapting to your walking pace, while the Select Cut system ensures a clean and precise cut every time. Coupled with the convenience of battery power and the included dual batteries and rapid charger, this mower delivers a premium experience that rivals, and often surpasses, traditional gas models in terms of ease of use and environmental impact.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Motor Type | Brushless |
| Drive System | Self-Propelled with Touch Drive |
| Battery System | 56V ARC Lithium™ |
| Included Batteries | (2) 6.0Ah |
| Charger | Rapid Charger |
| Deck Material | Steel |
| Mulching Capability | Yes (with Select Cut) |
Reasons to Buy
- Effortless self-propelled operation with intuitive Touch Drive speed control.
- Powerful and consistent cutting performance with the Select Cut™ system.
- Long runtime provided by dual 6.0Ah 56V batteries and rapid charging capability.
- Significantly reduced maintenance compared to gas mowers.
- Convenient vertical storage design saves valuable garage or shed space.
- Eco-friendly operation with zero emissions and reduced noise pollution.
Reasons to Avoid
- Higher initial purchase price compared to basic gas or corded electric mowers.
- Battery runtime may be reduced in very demanding conditions (thick, wet grass) or when using self-propel at maximum speed for extended periods.
9. UPLUS NEW TECHNOLOGY BATTERY 21 inch battery lawn mower – Recommended
If you're a homeowner with a riding lawn mower and are tired of dealing with unreliable batteries, the UPLUS U1 Riding Lawn Mower Battery might be the solution you've been searching for. This 12V, 330CCA maintenance-free AGM battery is designed to provide dependable power for a wide range of popular garden tractor brands, ensuring your mower starts up smoothly and runs efficiently season after season. It's a great option for those who value consistent performance and want to minimize downtime during essential lawn care tasks.
What sets this battery apart is its robust construction and commitment to a maintenance-free design, utilizing AGM (Absorbent Glass Mat) technology. This means you won't have to worry about checking water levels or dealing with corrosive leaks, making it a hassle-free upgrade or replacement. For anyone who relies on their riding mower for regular lawn maintenance and wants a reliable power source that's compatible with many leading brands, this UPLUS battery offers a compelling blend of performance and convenience.
Key Specifications
| Feature | Details |
|---|---|
| Battery Type | AGM (Absorbent Glass Mat) |
| Voltage | 12V |
| Cold Cranking Amps (CCA) | 330 |
| Terminal Type | Standard Post |
| Maintenance | Maintenance-Free |
| Compatibility | John Deere, Cub Cadet, Husqvarna, Craftsman, Toro, Ariens, Poulan Pro, Troy-Bilt, and more |
| Dimensions | [Specific dimensions would be listed here if available] |
| Warranty | [Specific warranty information would be listed here if available] |
Reasons to Buy
- Reliable starting power with 330 CCA for quick engine ignition.
- Maintenance-free AGM design eliminates the need for water top-ups and reduces spill risk.
- Broad compatibility with many major riding lawn mower and garden tractor brands.
- Durable construction with vibration and shock resistance for longevity.
- Holds charge well for extended periods, ideal for seasonal use.
Reasons to Avoid
- CCA rating might be lower than some high-performance or specialized mower requirements.
- Always verify exact dimensions and terminal type against your mower's specifications before purchase.
10. WORX 21 inch battery lawn mower – Recommended
If you're tired of the hassle of gas-powered mowers but need something more robust than a smaller electric model, the WORX Nitro 21" Cordless Electric Lawn Mower is a compelling option. Designed for homeowners with yards up to half an acre, this mower offers the convenience of battery power without sacrificing cutting performance. It's ideal for those seeking a quieter, cleaner, and more user-friendly way to maintain their lawn, especially if they're looking to ditch the pull-cord and gas fumes.
What truly sets the WORX Nitro apart is its combination of a substantial 21-inch cutting deck, powerful brushless motor, and the inclusion of two 5.0 Ah batteries with a charger. This package provides ample runtime for most medium-sized lawns and ensures you can tackle thicker grass with confidence. It’s a well-rounded solution that balances power, portability, and ease of use, making lawn care a less daunting chore.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Motor Type | Brushless |
| Battery | 2 × 5.0 Ah Lithium-Ion (20V/40V Max System) |
| Charge Time | Approximately 2 hours per battery |
| Deck Material | Steel |
| Height Adjustment | 7-position single lever |
| Mulching/Bagging/Side Discharge | Yes (all included) |
| Weight | Approximately 55 lbs |
Reasons to Buy
- Powerful cutting performance suitable for medium-sized lawns up to 1/2 acre.
- Dual 5.0 Ah battery system provides ample runtime and quick swapping.
- Easy single-lever height adjustment with 7 settings.
- Quiet operation and zero emissions for a more pleasant mowing experience.
- Compact vertical storage saves significant space.
Reasons to Avoid
- May not be sufficient for very large yards (over 1/2 acre) without additional batteries or multiple charging cycles.
- Lacks self-propel functionality, requiring manual pushing.
Our Top Picks for the best 21 inch battery lawn mower
Here are our top 3 picks based on performance, versatility, and user satisfaction.
Wrap Up the best 21 inch battery lawn mower
Choosing the right 21 inch battery lawn mower depends on your lawn size, terrain, and desired features. For those seeking convenience and less physical exertion, self-propelled models are a fantastic choice. If you have a smaller yard or prefer a more budget-friendly option, a reliable push mower can still get the job done efficiently.
Investing in a quality electric mower means less maintenance, quieter operation, and no more dealing with gasoline. The best 21 inch battery lawn mower reviewed here offer excellent performance and features for a variety of needs. Consider your priorities carefully to make an informed decision that will serve you well for seasons to come.
FAQs Regarding 21 inch battery lawn mower
What is the average runtime for a 21 inch battery lawn mower?
Runtime varies significantly by battery capacity and mower model, but typically ranges from 30 to 60 minutes on a single charge.
Are 21 inch battery lawn mowers powerful enough for tall, thick grass?
Higher voltage models, especially those with brushless motors, are generally powerful enough for most residential grass types.
Do I need to worry about battery replacement costs for a 21 inch battery lawn mower?
Batteries are a significant part of the cost, but they are designed to last for many years. Replacement costs should be factored into the long-term ownership.
What are the benefits of a self-propelled 21 inch battery lawn mower?
Self-propelled models reduce the physical effort required to push the mower, making them ideal for larger yards, slopes, or users who prefer less strenuous yard work.
How do I maintain the battery of my 21 inch battery lawn mower?
Store batteries in a cool, dry place and avoid extreme temperatures. Follow the manufacturer's charging guidelines to maximize battery lifespan.
Can I use a 21 inch battery lawn mower for commercial purposes?
While some high-end models can handle light commercial use, most are designed for residential lawns. Commercial-grade mowers are typically larger and more robust.
Are there any noise regulations for battery-powered lawn mowers?
Battery-powered mowers are significantly quieter than gas mowers, and generally do not face the same noise restrictions.
How does the cutting performance of a 21 inch battery lawn mower compare to a gas mower?
Modern battery-powered mowers offer cutting performance comparable to gas mowers, especially in terms of cut quality and power for most residential lawns.
