RB 40V 13-Inch Brushless Cordless Lawn Mower with 4.0Ah Lithium Battery & Fast Charger, 2-in-1 Lightweight Mower for Small Yards, Foldable Handle, 5 Cutting Height Adjustments
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MEDIOCRE
61
Winnowl Index
Winnowl Verdict
Our product audit of the RB 40V 13-Inch Brushless Cordless Lawn Mower positions it at a MEDIOCRE (61) Winnowl Index, where the price and capability sit at or above average. The Strong Value index combined with the 35 brand strength from RB and an Average Performance rating is a balanced purchase. The Battery Voltage of 40 V is above the 45.78 and means you should find the power sufficient for weekly cuts, maintaining consistent blade speed through most standard grass types, while on the lower end the Cutting Width is below the class average and may mean meeting the minimum requirements. We recommend staying with this purchase; it captures 8% better cost to Performance than the standard entry in this class.
Market Value Index
Strong
$209.99
Overpriced
Fair
High Value
At $209.99, you’re capturing 8% more Performance per dollar than the $262.51 average, which confirms its Strong Value.
Performance Rating
Average
With an Average Performance rating, the Battery Voltage of 40 V suggests you should find the power sufficient for weekly cuts, maintaining consistent blade speed through most standard grass types, though the Cutting Width at 13 inches might occasionally mean meeting the minimum requirements.
Brand Strength
Average
Data for RB confirms overall Average Brand Strength; backed by Mediocre Brand Trust tells us the manufacturer is a known, reliable brand.
Available At
$209.99
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The Winnowl Lab Report
| Specification | Value | Rating | Vs. Average | Winnowl Insight |
|---|---|---|---|---|
| Cutting Width | 13 inches | Mediocre | 22% worse | |
| Number of Batteries | 1 count | Average | 31% worse | Single-pack baseline. This is the entry point for cordless mowers, providing no hot-swap capability for larger jobs. |
| Total Run Time | 35 minutes | Average | 15% worse | Standard duty cycle. This endurance level matches the average residential mowing session for most homeowners. |
| Warranty | 2 Years | Average | 32% worse | Standard industry protection. This coverage aligns with the market average and offers a fair level of consumer security. |
| Cutting Height Adjustment | 5 settings | Average | 12% worse | Standard precision. Offers enough variety to handle the transition from spring growth to summer dormancy. |
| Charging Time | 120 mins | Average | 2% worse | Slow-recovery charging. Common in value-tier bundles where the charger lacks active cooling or high-amperage circuitry. |
| Battery Capacity | 4 Ah | Average | 4% worse | |
| Battery Voltage | 40 V | Average | 2% better | Standard residential output. This range represents the industry sweet spot for balancing battery weight with reliable cutting torque. |
Ranking Factors
Insights
- Value Rank: #73 out of 45.
- Performance Rank: #75 out of 45.
- Winnowl Quadrant: Budget
Neutral
- A Battery Voltage of V is about average (39.08 V) but below the highest in class at 80 V.
- A Battery Capacity of Ah is about average 4.17 Ah but below the class max of 6 Ah.
- A Total Run Time of minutes is about average (41.30 minutes) but not as long as the class max of 70 minutes.
- A Cutting Height Adjustment of settings is about average (5.68 settings) but not as many as the class max of 10 settings.
- A Charging Time of mins is about average 117.19 mins but below the fastest at 30mins.
Weaknesses
- inches is in the bottom 10% for cutting width in this class.
- The Years warranty is in the bottom 10%, offering minimal long-term protection.
- At only battery, this is in the bottom 10% for included power components.
Comparison
| Name | Winnowl Index | Value | Performance | Brand | Price | Total Run Time | Battery Voltage | Battery Capacity | Cutting Width | Warranty | Charging Time | Number of Batteries | Cutting Height Adjustment |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RB 40V 13-Inch Brushless Cordless Lawn Mower |
MEDIOCRE
61
|
Strong | Average | Average | $209.99 | 35 minutes | 40 V | 4 Ah | 13 inches | 2 Years | 120 mins | 1 count | 5 settings |
| Kobalt Gen4 40-volt, 20-in Push Lawn Mower |
STRONG
86
|
Fair | Strong | Exceptional | $0.00 | 60 minutes | 40 V | 6 Ah | 20 inches | 5 Years | 180 mins | 1 count | 6 settings |
| PowerSmart 80V MAX 21in. Cordless Push Lawn Mower |
STRONG
80
|
Mediocre | Strong | Average | $399.99 | 60 minutes | 80 V | 6 Ah | 21 inches | 4 Years | 75 mins | 1 count | 7 settings |
| LiTHELi Electric Lawn Mower |
AVERAGE
71
|
Exceptional | Average | Average | $119.99 | 30 minutes | 40 V | 4 Ah | 17 inches | 3 Years | 120 mins | 2 count | 6 settings |
Rankings
