Greenworks 48V 17" Cordless Lawn Mower , 4.0Ah vs RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
Updated July 2026 — Greenworks 48V 17" Cordless Lawn Mower , 4.0Ah wins on cutting width and runtime, RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah wins on weight and price.
The Greenworks 48V is a more powerful and versatile option for larger lawns, while the RB 9" is a compact and budget-friendly choice for small spaces.
Why Greenworks 48V 17" Cordless Lawn Mower , 4.0Ah is better
Power
Greenworks has a 48V system for larger lawns.
Runtime
Greenworks offers up to 45 minutes of runtime.
Cutting Options
Greenworks has a 2-in-1 design for mulching and bagging.
Why RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah is better
Weight
RB 9" is ultra-light at 11.5 lbs.
Price
RB 9" is more affordable at $169.99.
Storage
RB 9" has upright storage capabilities.
Overall score
Specifications
| Spec | Greenworks 48V 17" Cordless Lawn Mower , 4.0Ah | RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah |
|---|---|---|
| Battery | 2 x 4.0Ah | 1 x 2Ah |
| Deck Size | 17" | 9" |
| Motor | Brushless | Brushless |
| Height Adjust | 5 positions | 3 positions |
| Safety Features | Push-button start | Auto-stop |
Dimension comparison
Overview of the Lawn Mowers
When comparing the Greenworks 48V and the RB 9" Small Lawn Mower, it's clear that both models cater to different user needs. The Greenworks 48V is designed for larger lawns, while the RB 9" is ideal for tighter spaces. Priced at $274.91, the Greenworks offers a robust feature set, including dual batteries for extended runtime. In contrast, the RB 9" is more budget-friendly at $169.99, emphasizing lightweight and compact design for small yards.
Performance Comparison
Performance is a crucial aspect when choosing a lawn mower. The Greenworks 48V features a powerful 48V system derived from two 24V batteries, providing up to 45 minutes of runtime. This performance is suitable for larger tasks, making it an excellent choice for medium-sized lawns. On the other hand, the RB 9" is powered by a 40V 2Ah battery and is designed for small lawns up to 540 square feet. While it may not match the runtime of the Greenworks, its 6000 RPM brushless motor ensures efficient mowing within its capacity.
Design and Build Quality
In terms of design, the Greenworks 48V boasts a 17” rust-resistant deck made from lightweight materials, which aids in maneuverability. Its collapsible handles make it easier to store when not in use. Alternatively, the RB 9" is ultra-lightweight, weighing only 11.5 lbs without the battery, making it easy to handle and navigate in small spaces. Its compact design, with upright storage capabilities, allows users to save space, which is a significant advantage for those with limited storage options.
Cutting Versatility
Cutting versatility is another area where these mowers differ significantly. The Greenworks 48V features a 2-in-1 design that allows for both mulching and rear bagging grass clippings. With a single lever offering 5 height adjustments, it can adapt to various grass types and mowing conditions. The RB 9", while having a smaller cutting width of 9", offers three adjustable cutting heights from 1.2" to 2". This feature caters to maintaining a well-groomed lawn, albeit within a limited scope.
Maintenance and Ease of Use
Maintenance requirements vary between the two lawn mowers. The Greenworks 48V is virtually maintenance-free, eliminating the need for gas, oil, and emissions, which simplifies the mowing process. It features a push-button start for added convenience. In contrast, the RB 9" emphasizes a low-maintenance design with its brushless motor, which requires no maintenance. Both mowers are designed for ease of use, but the Greenworks offers a more user-friendly experience for larger tasks due to its features.
Target Audience
The target audiences for these mowers differ greatly. The Greenworks 48V, with its higher price of $274.91 and robust capabilities, is geared toward homeowners with medium to larger lawns who prioritize performance and versatility. Its bestseller rank of 15,751 reflects its popularity among those seeking a reliable lawn care solution. Conversely, the RB 9" is perfect for individuals with small yards or those new to lawn care, thanks to its lower price of $169.99 and lightweight design, making it accessible for beginners.
Price Consideration
Price plays a significant role in the decision-making process for many consumers. The Greenworks 48V is priced at $274.91, making it about 62% more expensive than the RB 9" at $169.99. This pricing difference reflects the additional features and capabilities of the Greenworks, which may justify the cost for users with larger lawns needing longer runtimes and more cutting options. However, for those with smaller spaces, the RB 9" provides an economical choice without sacrificing essential features.
Which should you buy?
Ultimately, the choice between the Greenworks 48V and the RB 9" Small Lawn Mower depends on your specific lawn care needs. If you have a medium to large yard and prefer a mower with extensive features and durability, the Greenworks 48V is a solid investment at $274.91. However, if you have a smaller lawn and value portability and ease of use, the RB 9" at $169.99 is a smart choice that offers sufficient performance for its target market.

