6 Best Alternatives to the SUNTEK 40V 21-Inch Cordless Lawn Mower (2026)

How these models compare to the SUNTEK

PowerSmart 20-Inch Self-Propelled Cordless Mower

The PowerSmart 20-Inch model offers a slightly narrower 20-inch cutting deck compared to the SUNTEK’s 21-inch width. It shares the same 40V voltage, brushless motor, and dual 4.0Ah battery configuration. However, the PowerSmart weighs 57.5 pounds, which is 11.5 pounds lighter than the SUNTEK. This reduced weight may improve maneuverability on uneven terrain. Both units feature self-propelled drive systems, but the PowerSmart is specifically noted for hill-climbing traction. If you prioritize a lighter machine for slopes over the maximum cutting width, this model provides a solid alternative with comparable runtime and power delivery for medium-sized lawns.

Greenworks 40V 25-Inch Self-Propelled Mower

The Greenworks 40V 25-Inch model significantly widens the cutting path to 25 inches, covering more ground per pass than the SUNTEK’s 21-inch deck. Like the SUNTEK, it uses a 40V brushless motor and dual 4.0Ah batteries for extended runtime. The trade-off is size and weight; this unit weighs 76.2 pounds, which is 7.2 pounds heavier than the SUNTEK. Its larger dimensions require more storage space. This mower is best for large lawns where the wider cut reduces mowing time. If you need maximum coverage efficiency and have the storage capacity for a heavier, wider machine, this premium option outperforms the SUNTEK in raw cutting area.

Greenworks 40V 14-Inch Brushless Push Mower

The Greenworks 40V 14-Inch model is a push mower, lacking the self-propelled drive system found in the SUNTEK. Its 14-inch cutting width is much narrower, making it less efficient for large areas. However, it weighs only 36.4 pounds, significantly lighter than the SUNTEK’s 69 pounds. This compact size is ideal for small yards or tight storage spaces where maneuverability is key. It shares the 40V brushless motor and 4.0Ah battery capacity. If you have a small lawn and do not need self-propulsion, this budget-friendly option offers ease of use and storage convenience that the heavier, wider SUNTEK cannot match.

Greenworks 60V 21" Brushless Self-Propelled

The Greenworks 60V 21-Inch model steps up to a 60V voltage system while maintaining the 21-inch cutting width and self-propelled drive. It also uses brushless motors and 4.0Ah batteries. The higher voltage suggests increased power for thick grass or slopes compared to the 40V SUNTEK. Both models share similar dimensions and self-propelled features. This upgrade suits users who find 40V systems insufficient for challenging terrain or dense vegetation. If you require extra power for medium to large yards up to three-quarters of an acre, the 60V system provides a noticeable performance boost over the standard 40V SUNTEK configuration.

RB 40V 13-Inch Brushless Push Mower

The RB 40V 13-Inch model is a push mower with a narrow 13-inch cutting deck, significantly smaller than the SUNTEK’s 21-inch width. It lacks self-propulsion, requiring manual effort to push. However, it weighs only 28 pounds, making it the lightest option by far. This ultra-lightweight design is perfect for small yards where storage and ease of handling are priorities over speed. It shares the 40V brushless motor and 4.0Ah battery. If you value quiet operation and minimal physical exertion for small spaces, this compact alternative offers practicality that the larger, heavier SUNTEK cannot provide.

Greenworks 40V Cordless Push Mower Combo Kit

The Greenworks 40V Combo Kit includes a 13-inch push mower, which is narrower and lacks self-propulsion compared to the SUNTEK. It weighs 45 pounds, lighter than the SUNTEK’s 69 pounds. The key difference is the included blower and trimmer, offering versatility for yard maintenance beyond just mowing. It uses 4.0Ah batteries, similar to the SUNTEK. This bundle is ideal for small yards where you need multiple tools. If you require a blower or trimmer alongside your mower, this combo provides a complete solution. However, you sacrifice the wider cutting width and self-propelled convenience of the SUNTEK for added tool versatility.

Quick picks

Our 7 picks

1 Best overall

SUNTEK 40V 21" Brushless Self-Propelled

Best for: medium to large yards needing extended runtime

Power Source

40V battery

Cutting Width

21 in

Voltage

40V

Drive Type

self-propelled

Battery Capacity

2 x 4.0Ah

Cutting Height

1-2.95 in, 7 positions

View on Amazon: SUNTEK 40V 21" Brushless Self-Propelled Affiliate link

The SUNTEK 40V 21-Inch Cordless Lawn Mower features a brushless outrunner motor and dual 4.0Ah batteries. It offers self-propelled drive with seven speed levels and three working modes. The 21-inch deck cuts up to 2.95 inches high across seven positions. An integrated SmartView system displays real-time status. You can monitor charging via a companion app. This setup suits medium to large yards needing extended runtime.

Pros

• Brushless outrunner motor for efficient power
• Dual 4.0Ah batteries with automatic switchover
• Seven-level self-propelled speed control
• SmartView system for real-time status monitoring
• App control for charging schedules

Cons

• Heavier build at 69 pounds
• Requires assembly
• App connectivity may not suit all users

Good fit if

• You have a medium to large yard
• You want extended runtime from dual batteries
• You prefer self-propelled convenience

Skip if

• You need a lighter, push-only mower
• You prefer manual speed adjustment only
• You do not want app integration

Verdict: The SUNTEK 40V 21-Inch Self-Propelled Mower fits users with medium to large lawns who value extended runtime and precise speed control. Its dual battery system and brushless motor provide reliable performance for regular maintenance.

2 Best 20-inch

PowerSmart 20-Inch Self-Propelled Cordless Mower

Best for: Medium lawns needing hill-climbing traction

Power Source

40V cordless battery

Cutting Width

20 in

Voltage

40V

Drive Type

self-propelled

Battery Capacity

2 x 4.0Ah

Cutting Height

1.5-3.9 in, 6 positions

View on Amazon: PowerSmart 20-Inch Self-Propelled Cordless Mower Affiliate link

This PowerSmart mower features a 20-inch cutting deck and a brushless motor for efficient performance. It includes two 40V 4.0Ah batteries to extend runtime. The self-propelled rear-wheel drive helps on hills. You get six height settings and three discharge modes. This model suits users wanting a balanced mid-size cut with reliable power.

Pros

• Includes two 40V 4.0Ah batteries for extended runtime
• Brushless motor runs cooler and quieter
• Self-propelled rear-wheel drive for hills
• Six cutting height positions from 1.5 to 3.9 inches

Cons

• 20-inch cutting width is narrower than the 21-inch standard
• 57.5-pound weight adds to pushing effort
• No mention of app control or remote features

Good fit if

• You have a medium-sized lawn up to 0.5 acres
• You need extra power for hilly terrain
• You want dual batteries for longer sessions

Skip if

• You require a 21-inch or wider cutting deck
• You prefer a lightweight push mower
• You need smart app connectivity

Verdict: PowerSmart 20-Inch Self-Propelled Mower offers solid dual-battery runtime and hill-climbing traction. It fits homeowners who prioritize consistent power over maximum deck width.

3 Also great

Greenworks 40V 25-Inch Self-Propelled Mower

Best for: large lawns needing wide cuts

Power Source

40V battery

Cutting Width

25 in

Voltage

40V

Drive Type

self-propelled

Battery Capacity

4.0Ah

Runtime

70 min

View on Amazon: Greenworks 40V 25-Inch Self-Propelled Mower Affiliate link

This Greenworks mower features a 25-inch steel deck and brushless motor for efficient cutting. It includes two 4.0Ah batteries, offering up to 70 minutes of runtime. The self-propelled drive adjusts to your walking speed. Dual battery ports allow automatic switchover for uninterrupted mowing. This model suits larger lawns where width and runtime matter most.

Pros

• 25-inch steel cutting deck
• Brushless motor for torque and life
• Includes two 4.0Ah batteries
• Self-propelled with auto battery switchover
• 7-position height adjustment

Cons

• Heavier at 76.2 pounds
• Larger footprint for storage
• Shorter 3-year warranty

Good fit if

• You have a large lawn needing wide cuts
• You want extended runtime with dual batteries
• You prefer self-propelled ease on slopes

Skip if

• You need a compact push mower
• You have limited storage space
• You prefer lighter equipment

Verdict: Greenworks 40V 25-Inch Self-Propelled Mower delivers wide coverage and long runtime for big yards. It fits buyers who prioritize deck width and dual-battery endurance over compact storage.

4 Also great

Greenworks 40V 14-Inch Brushless Push Mower

Best for: small lawns and tight storage spaces

Power Source

40V battery

Cutting Width

14 in

Voltage

40V

Drive Type

push

Battery Capacity

4.0Ah

Runtime

45 min

View on Amazon: Greenworks 40V 14-Inch Brushless Push Mower Affiliate link

This Greenworks 40V push mower features a 14-inch steel deck and a brushless motor. It delivers up to 45 minutes of runtime on a 4.0Ah battery. The unit offers five cutting height positions from 1.25 to 3.375 inches. It supports mulching and bagging. This model suits small lawns or tight spaces where a compact, lightweight tool is necessary.

Pros

• Brushless motor for efficient torque and quiet operation
• 45-minute runtime on a fully charged 4.0Ah battery
• Steel deck provides durability and weight
• Single-lever height adjustment with five positions
• 2-in-1 mulching and bagging capability

Cons

• 14-inch cutting width is narrower than the 20-25 inch options on this list
• Push drive requires manual effort unlike the self-propelled competitors
• 3-year warranty is shorter than the 5-year coverage on other models

Good fit if

• You have a small lawn under 1,000 square feet
• You need a lightweight mower for easy storage
• You already own other Greenworks 40V tools

Skip if

• You require self-propelled power for slopes
• You need to cut wide swaths quickly
• You want a longer warranty period

Verdict: Greenworks 40V 14-Inch Push Mower fits users with small yards who prioritize a compact footprint over cutting width. It is a practical option for tight spaces but lacks the power and ease of self-propelled models.

5 Best 60v

Greenworks 60V 21" Brushless Self-Propelled

Best for: medium to large yards up to 3/4 acre

Power Source

Cordless battery

Cutting Width

21 in

Voltage

60V

Drive Type

Self-propelled

Battery Capacity

2x4.0Ah

Mowing Function

4-in-1

View on Amazon: Greenworks 60V 21" Brushless Self-Propelled Affiliate link

This Greenworks mower uses a 60V brushless motor and two 4.0Ah batteries to handle up to 3/4 acre per charge. It features rear-wheel drive self-propulsion for slopes and thick grass. You get a 21-inch cutting width with 4-in-1 versatility, including mulching and side discharge. An LED headlight allows for dawn-to-dusk mowing. It operates quietly and requires zero emissions.

Pros

• 60V brushless motor delivers gas-like power
• Includes two 4.0Ah batteries for extended runtime
• Rear-wheel drive self-propelled traction
• 21-inch cutting deck with 4-in-1 functions
• LED headlight for low-light conditions

Cons

• Higher voltage system may not match 40V battery compatibility
• No app or remote control features listed
• Battery and charger sold separately in some variations

Good fit if

• You need extra runtime for larger yards up to 3/4 acre
• You mow on slopes requiring rear-wheel drive traction
• You want to mulch, bag, or side discharge grass

Skip if

• You already own a large 60V Greenworks battery ecosystem
• You prefer a lighter push mower for small flat yards
• You need a mower compatible with 40V batteries only

Verdict: Greenworks 60V 21-Inch Self-Propelled Mower suits users with medium to large yards who need the power of 60V and the convenience of self-propulsion. It is ideal for those tackling slopes or thick grass who value extended runtime over 40V systems.

6 Best budget

RB 40V 13-Inch Brushless Push Mower

Best for: small yards and quiet operation

Power Source

40V battery

Cutting Width

13 in

Voltage

40V

Battery Capacity

4.0Ah

Runtime

Up to 30 min

Cutting Height

5 positions

View on Amazon: RB 40V 13-Inch Brushless Push Mower Affiliate link

The RB 40V 13-Inch Push Mower is a lightweight, brushless cordless mower designed for small yards. It features a 13-inch cutting width and a 4.0Ah battery that provides up to 30 minutes of runtime. The unit weighs only 28 lbs and includes a foldable handle for easy storage. It offers 2-in-1 bagging or mulching capabilities. This model suits users with limited space who need a quiet, eco-friendly tool for light mowing tasks.

Pros

• Brushless motor for quieter operation and durability
• Ultra-lightweight 28 lb build with foldable handle
• 30-minute runtime on a 4.0Ah battery
• 2-in-1 bag or mulch versatility

Cons

• Narrow 13-inch cutting width limits efficiency on larger lawns
• Push drive requires manual effort unlike self-propelled competitors
• Short 30-minute runtime restricts continuous use

Good fit if

• You have a small yard under 3,000 square feet
• You need a lightweight mower for easy storage
• You prefer quiet operation for early morning mowing

Skip if

• You need to cover large areas in one session
• You want self-propelled power for hilly terrain
• You require a wider cutting deck for faster work

Verdict: RB 40V 13-Inch Push Mower fits users with small yards who value lightweight storage and quiet operation over cutting speed.

7 Best premium

Greenworks 40V Cordless Push Mower Combo Kit

Best for: Small yards needing a mower and blower bundle

Power Source

40V battery

Cutting Width

16 in

Voltage

40V

Drive Type

push

Battery Capacity

4.0Ah + 2.0Ah

Runtime

up to 45 min

View on Amazon: Greenworks 40V Cordless Push Mower Combo Kit Affiliate link

This Greenworks 40V 16-inch push mower comes with a 4.0Ah battery and charger, plus a matching blower and string trimmer. The brushless motor delivers up to 45 minutes of runtime on a full charge. The 16-inch cutting deck is designed for small to medium yards up to half an acre. You get a lightweight setup that is easy to maneuver. The included blower offers 350 CFM and 100 MPH airflow for debris cleanup.

Pros

• Includes 40V 4.0Ah battery and charger
• Brushless motor for efficient power
• Up to 45 minutes of runtime
• Comes with 350 CFM blower and string trimmer

Cons

• 16-inch cutting width is narrower than competitors
• Push drive requires more physical effort
• Only includes one 4.0Ah battery

Good fit if

• You have a small yard up to half an acre
• You want a blower and trimmer included in the price
• You prefer a lightweight push mower for easy handling

Skip if

• You need self-propelled assistance for slopes
• You require a wider 21-inch cutting deck
• You need runtime exceeding 45 minutes

Verdict: Greenworks 40V 16" Brushless Mower and Blower Combo is a practical bundle for small yards where you need a blower and trimmer alongside your mower. It suits users who value versatility over cutting width and self-propulsion.

Specifications side by side

Frequently asked questions

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