BLACK+DECKER 20-Inch Corded Electric Lawn Mower vs RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
Updated July 2026 — BLACK+DECKER 20-Inch Corded Electric Lawn Mower wins on cutting width and power, RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah wins on weight and storage space.
The BLACK+DECKER mower excels in performance and versatility, while the RB mower is ideal for small spaces and ease of use.
Why BLACK+DECKER 20-Inch Corded Electric Lawn Mower is better
Cutting Width
20-inch cutting width for larger areas
Power
13 Amp motor for tougher grass
Versatility
3-in-1 cutting modes for varied needs
Why RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah is better
Weight
Only 11.5 lbs for easy maneuverability
Price
$169.99 is more affordable
Storage
Compact design saves storage space
Overall score
Specifications
| Spec | BLACK+DECKER 20-Inch Corded Electric Lawn Mower | RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah |
|---|---|---|
| Motor | 13 Amp | 40V Brushless |
| Cutting Modes | 3-in-1 | 1 |
| Battery | Corded | 2Ah |
| Height Settings | 7 | 3 |
| Bestseller Rank | 31868 | 20912 |
Dimension comparison
Overview of the BLACK+DECKER 20-Inch Corded Electric Lawn Mower
The BLACK+DECKER 20-Inch Corded Electric Lawn Mower is a robust choice for homeowners looking for power and versatility in lawn maintenance. Priced at $259.00, this mower features a 13 Amp high-output motor, capable of handling thick grass and overgrowth with ease. The mower offers three cutting modes: mulching, bagging, and side discharge, making it adaptable for various lawn care needs. Additionally, its EdgeMax deck design allows for close cutting near edges, minimizing the need for additional trimming. With a bestseller rank of 31,868, it’s a reliable option for those who prioritize performance.
Overview of the RB 9" Small Lawn Mower for Small Spaces
The RB 9" Small Lawn Mower for Small Spaces is an ultra-light and compact model designed for smaller lawns and tight spaces. At a price of $169.99, it is approximately 17% cheaper than the BLACK+DECKER mower. This mini cordless mower is powered by a 40V 2Ah battery and features a brushless motor that operates at 6000 RPM, providing efficient cutting for lawns up to 540 square feet. Its one-hand steering and lightweight design (11.5 lbs without battery) enhance maneuverability, making it suitable for beginners and those with limited storage space. The mower has a bestseller rank of 20,912, indicating its popularity among consumers.
Cutting Performance Comparison
When it comes to cutting performance, the BLACK+DECKER mower excels with a 20-inch cutting width, which allows for quicker mowing over larger areas. Its 13 Amp motor ensures it can tackle tougher grass without a hitch. In contrast, the RB mower, with its smaller 9-inch cutting width, is designed for fine mulching in smaller yards. It offers three adjustable cutting heights ranging from 1.2 inches to 2 inches, allowing for some flexibility in lawn care, but it may not match the BLACK+DECKER's capability for heavier vegetation. Ultimately, for larger lawns, the BLACK+DECKER may be the better choice for efficiency.
Weight and Maneuverability
Weight and maneuverability are crucial factors for many users. The RB mower shines in this category, weighing only 11.5 lbs (without the battery), making it extremely easy to handle and transport. This ultra-lightweight design allows for greater maneuverability in tight spaces, especially beneficial for those with smaller yards or intricate landscaping. On the other hand, the BLACK+DECKER mower, while still manageable, is heavier and may require more effort to navigate around obstacles. Its design, however, does allow for close cutting along edges, which is a significant advantage for maintaining a tidy lawn.
Versatility in Lawn Care
The BLACK+DECKER mower offers impressive versatility with its 3-in-1 cutting capabilities—mulching, bagging, and side discharge—allowing users to choose the best method for their lawn care needs. This flexibility is complemented by its 7-setting height adjustment, accommodating grass heights from 1.5 inches to 4 inches for varied cutting preferences. In contrast, the RB mower focuses on simplicity and efficiency with its three cutting heights but lacks the same range of options. While it’s effective for smaller lawns, it may not provide the same level of customization as the BLACK+DECKER model.
Safety Features
Safety is a significant consideration for lawn mowers, and both models have features designed to protect users. The RB mower includes an advanced safety design that automatically stops the motor if the mower is tilted beyond a certain angle, adhering to US safety standards. This is particularly beneficial for users who may be new to operating a mower. Meanwhile, the BLACK+DECKER mower does not specifically highlight advanced safety features, but its robust design and reliable motor contribute to a safe mowing experience. Ultimately, the RB's safety features may appeal more to first-time users or those with safety concerns.
Storage and Portability
When it comes to storage and portability, the RB mower excels with its space-saving design. It features a detachable aluminum handle and can stand upright, saving up to 70% of storage space. This is particularly advantageous for users with limited storage options. The BLACK+DECKER mower, while equipped with carry handles for easy transport, does not offer the same compact storage solutions. For users in urban environments or those with small garages, the RB mower’s compact design may be a compelling factor.
Which should you buy?
Deciding between the BLACK+DECKER 20-Inch Corded Electric Lawn Mower and the RB 9" Small Lawn Mower for Small Spaces depends largely on your specific lawn care needs. If you have a larger yard or need a mower that can handle thick grass and varied cutting modes, the BLACK+DECKER's performance and versatility make it a strong contender. However, for those with small lawns or limited storage space, the RB mower offers an excellent balance of efficiency, safety, and portability at a lower price point of $169.99. Ultimately, your choice should align with the size of your lawn, your storage capacity, and your mowing preferences.

