Greenworks 80V 21" Self-Propelled Cordless Lawn Mower – Brushless Motor, LED Lights, 4.0Ah Battery & Rapid Charger (75+ Compatible Tools) Review

Overview

The Greenworks 80V 21" Self-Propelled Cordless Lawn Mower is a battery-powered workhorse designed for homeowners with medium-sized lawns (roughly 1/4 to 1/2 acre) who want gas-like power without the mess, noise, or maintenance. It’s a strong contender for anyone ready to ditch the gas can and extension cord, offering brushless motor efficiency, LED headlights for dusk mowing, and the ability to share batteries with over 75 other Greenworks 80V tools. At $479.99, it sits in the premium cordless category, but the included 4.0Ah battery and rapid charger make it a solid value for the right buyer.

Who Should Buy This

• Homeowners with 1/4 to 1/2 acre lawns – The 80V platform and 4.0Ah battery can handle a typical suburban yard on a single charge, especially if you’re not bagging wet, thick grass. If your lot is smaller, you’ll have plenty of juice to spare. If it’s larger, you’ll want a second battery.

• Gas-to-electric converts who hate maintenance – If you’re tired of winterizing, fuel stabilizer, oil changes, and pulling a cord 15 times, this mower is your exit ramp. Charge the battery, press a button, and go. No fumes, no trips to the gas station.

• Evening and early morning mowers – The integrated LED headlights are not a gimmick. They genuinely illuminate the path in low light, so you can mow after work without waiting for the weekend sun.

• Homeowners who already own Greenworks 80V tools – If you’ve got an 80V trimmer, blower, or chainsaw, this mower uses the same battery. That means you can buy the “tool only” version (if available) or just rotate batteries between tools. It’s a smart ecosystem play.

Key Features Breakdown

• 80V Brushless Motor – Brushless motors are more efficient, quieter, and last longer than brushed motors. This one delivers torque comparable to a 150cc gas mower. It won’t bog down easily in thick grass, but don’t expect it to plow through wet, heavy growth like a 190cc Honda.

• 21" Steel Deck with 7-Position Height Adjustment – The 21-inch cutting width is standard for residential mowers. The steel deck is durable but adds weight (about 65 lbs with battery). The single-lever height adjustment is easy to use, with positions from 1.5" to 4". That’s a good range for most cool- and warm-season grasses.

• Self-Propelled Drive (Rear-Wheel) – Rear-wheel drive gives you better traction on slopes and hills compared to front-wheel drive. The variable-speed trigger lets you match your walking pace. It’s not as smooth as a premium Honda or Toro self-propel system, but it’s more than adequate for gentle inclines.

• 4.0Ah Battery & Rapid Charger – The 4.0Ah battery is the sweet spot for this mower—enough for about 45 minutes of runtime under normal conditions (cutting dry, 3-4" grass). The rapid charger refills it in about 60 minutes. If you bag or mulch heavy grass, expect closer to 30 minutes.

• LED Headlights – Two bright LEDs mounted on the front of the deck. They’re angled to light up the cutting path, not your neighbor’s window. Useful for twilight mowing, but also handy for seeing debris in shady corners.

• 3-in-1 Capability (Mulch, Bag, Side Discharge) – Standard for the category. The mulching plug is included, and the bagger is decent (holds about 1.5 bushels). Side discharge works well for tall grass. Switching between modes is tool-free.

Pros

1. Excellent battery runtime for the price – Most mowers in this class ship with a 2.5Ah or 3.0Ah battery. The 4.0Ah gives you real-world 45-minute runs, which covers most suburban lawns.

2. Brushless motor is genuinely quiet – You can mow without earplugs and still hold a conversation. It’s not silent, but it’s far quieter than any gas mower.

3. LED lights are actually useful – Not a checklist feature. They’re bright, well-positioned, and make early/late mowing safe and easy.

4. Self-propulsion is smooth on flat ground – The variable-speed trigger gives good control. It’s not jerky like some budget self-propelled models.

5. Ecosystem battery compatibility – If you buy into Greenworks 80V, this battery works with trimmers, blowers, chainsaws, and more. It’s a long-term investment.

6. Tool-free height adjustment and folding handle – The handle folds for compact storage, and the height lever is easy to reach. Assembly takes about 10 minutes out of the box.

Cons

1. Self-propel can struggle on steep hills – Rear-wheel drive helps, but the motor isn’t as torquey as a gas self-propel system. If your yard has a 15°+ slope, you might need to push a bit.

2. Bagging capacity is average – The 1.5-bushel bag fills up fast, especially in thick grass. You’ll make frequent trips to the compost pile compared to a 2+ bushel gas mower.

3. No smart battery gauge on the mower – The battery has its own LED indicator, but you have to remove it to check. A handle-mounted gauge would be more convenient.

4. Not ideal for very wet grass – Like most electric mowers, it tends to clump and leave streaks if the grass is damp. Wait for it to dry, or plan to mulch.

Bottom Line

The Greenworks 80V 21" Self-Propelled Mower is one of the best values in the cordless category for homeowners with medium-sized, relatively flat lawns. It delivers gas-competitive power, genuine convenience, and a battery that works across an entire tool lineup. It’s not the most powerful mower on the market—if you have a steep, hilly acre, stick with gas—but for 95% of suburban users, it’s a quiet, clean, low-maintenance upgrade that will save you time and frustration. I recommend it confidently for anyone ready to retire their gas mower for good.

Frequently Asked Questions

Q: How long does the battery last on a full charge? A: Expect 40–50 minutes of runtime in normal conditions (cutting dry grass at 3-4 inches with self-propel on medium speed). If you’re bagging thick, tall grass or using max self-propel speed, drop that to 25–35 minutes. A second battery