Greenworks 80V 21" Brushless Cordless (S vs SENIX 22" Self-Propelled Gas Lawn Mower
Quick Verdict
For most homeowners, the Greenworks 80V 21" Cordless is the better choice. It offers strong performance, lower maintenance, and a higher user satisfaction rating (4.4 vs 4.0). The SENIX 22" Gas wins only if you need maximum power for large, rugged yards or want the included trimmer for a bundled setup.
Side-by-Side
| Feature | Greenworks 80V 21" Cordless | SENIX 22" Gas |
|---|---|---|
| Price | $559.99 | $579.00 |
| Power Source | 80V battery (brushless) | 170cc gas engine |
| Cut Width | 21 inches | 22 inches |
| Self-Propelled | Yes | Yes |
| Best Yard Size | Up to 1/3 acre | 1/3 to 1/2 acre |
| User Rating | 4.4/5 (1,696 reviews) | 4.0/5 (463 reviews) |
| Extras | None | Includes 17-inch 26.5cc gas trimmer |
Where Greenworks Wins
Higher reliability and satisfaction. With a 4.4 rating from nearly 1,700 reviews, users consistently praise its quiet operation, instant start, and consistent power. The brushless motor is more efficient than a gas engine, providing longer runtime per charge and less vibration.
Lower maintenance. No oil changes, spark plugs, or fuel mixing. The 80V battery system is lightweight and charges in about an hour. For yards up to 1/3 acre, a single charge often suffices. The 21-inch cut width is standard for residential lawns, and the self-propelled drive works well on gentle slopes.
Quieter and cleaner. Cordless operation means no exhaust fumes, making it pleasant to use and neighbor-friendly. You can mow early or late without disturbing others.
Where SENIX Wins
Raw cutting power. The 170cc gas engine delivers more torque, especially in tall, wet, or thick grass. The 22-inch cut width is slightly wider, reducing pass count on larger lawns. This mower handles uneven terrain and heavier growth without bogging down.
Bundled value. The package includes a 17-inch 26.5cc gas trimmer, which adds about $100–$150 in value. If you need both a mower and trimmer, this is a cost-effective combo.
Unlimited runtime. With gas, you never need to wait for a battery to charge. For yards over 1/3 acre or those with heavy brush, gas provides uninterrupted operation.
Which Should You Buy
Choose the Greenworks if: You value low maintenance, quiet operation, and a proven track record. It’s ideal for standard suburban lawns up to 1/3 acre. The higher rating and lower price make it the smarter investment for most.
Choose the SENIX if: Your yard is larger than 1/3 acre, has thick or wet grass, or you want the included trimmer to save money on a second tool. Be prepared for gas engine maintenance and noise.
Final recommendation: Unless you specifically need the extra power or the trimmer bundle, the Greenworks delivers better overall value and user satisfaction.