Best Cordless Lawn Mower for Steep Lawns
Mowing a steep lawn with a corded or heavy petrol mower is dangerous and exhausting. We have ranked the best cordless lawn mowers for steep lawns based on traction, lightweight design, and battery power to keep you safe on the slope.
Quick answer
The Flymo EasiLife 600 Go is the best cordless lawn mower for steep lawns thanks to its lightweight 11.6 kg build and 35-degree slope rating. For a more powerful traditional wheeled option, the Stihl RMA 2 RT is the top pick for larger, steep gardens.
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Research updated June 2026.
Flymo EasiLife 600 Go
Lightest robotic mower with 35-degree slope capability.
| Product | Best For | Key Spec | Rating | Price |
|---|---|---|---|---|
| Flymo EasiLife 600 Go | Overall steep slopes | 35° slope, 11.6 kg | 4.7 / 5 | $$ |
| Stihl RMA 2 RT | Large steep lawns | 50 cm deck, 32 kg | 4.6 / 5 | $$$ |
| Ryobi RLM36X46S50 | Value on hills | 46 cm, 25 kg | 4.5 / 5 | $ |
| Bosch Rotak 32 LI | Small steep gardens | 32 cm, 13 kg | 4.4 / 5 | $ |
| Makita DLM432Z | Battery ecosystem | 43 cm, 22 kg | 4.5 / 5 | $$ |
What makes a cordless mower good for steep lawns?
Mowing on a slope requires a mower with a low centre of gravity, lightweight frame, and excellent traction. Heavy petrol mowers can slide or tip, while corded models limit your range. Cordless mowers for steep lawns should have large rear wheels for grip, a balanced weight distribution, and a battery that lasts long enough to finish the job without dragging a cable.
Owner reviews consistently highlight three factors: the mower must not stall going uphill, it must be easy to push on the return, and the battery should not cut out on incline. The best models also feature a handle that adjusts to your height to maintain control on uneven terrain.
What to check before buying a cordless mower for slopes
Slope rating. Check the manufacturer's maximum slope angle. Most standard mowers are rated for 15-20 degrees, while specialist models go up to 35 degrees. Never exceed this rating for safety.
Weight and balance. A lighter mower (under 20 kg) is easier to push uphill and less likely to tip. However, too light can mean less traction. Look for models with rear-wheel drive or large wheels for better grip.
Battery voltage and runtime. Higher voltage (36 V or 40 V) provides more torque for climbing. Runtime should be at least 30 minutes on a single charge for a typical steep lawn. Consider buying a second battery if your lawn is large.
Wheel size and type. Large rear wheels (250 mm or more) with deep treads provide better traction on grass and mud. Ball-bearing wheels roll more smoothly on slopes.
Handle adjustability. An ergonomic handle that tilts and telescopes helps you maintain a stable stance on a slope. Soft-grip handles reduce fatigue.
Mistakes to avoid when buying a mower for steep lawns
Buying a corded mower. A trailing cable on a slope is a tripping hazard and limits your reach. Cordless is safer and more practical for steep gardens.
Choosing a mower with small wheels. Small wheels dig into soft ground and lose traction on slopes. Always opt for large, treaded wheels for hills.
Ignoring the grass collection system. A full grass box adds weight and can make the mower unstable on a slope. Look for a mower with a rear or side discharge option to reduce weight.
Overlooking battery compatibility. If you already own tools from a brand like Makita or Ryobi, buying a mower from the same ecosystem saves money on batteries and chargers.
Flymo EasiLife 600 Go
Best Overall for Steep LawnsPros
- Ultra-lightweight at 11.6 kg
- Rated for 35-degree slopes
- Robotic mower, zero effort
Cons
- Requires boundary wire installation
- Small cutting width for large lawns
The Flymo EasiLife 600 Go is a robotic mower specifically designed for steep lawns. It weighs only 11.6 kg and can handle gradients up to 35 degrees, making it the safest option for challenging slopes. The mower uses a 20 V battery that runs for about 60 minutes per charge, enough for a small to medium garden.
Owner reviews praise its ability to climb hills without slipping or getting stuck. The only downside is the need to lay a boundary wire around the lawn perimeter. For those with a steep lawn who want a hands-off solution, this is the top choice.
Stihl RMA 2 RT
Best for Large Steep LawnsPros
- Large 50 cm cutting deck
- Rear-wheel drive for traction
- Powerful 36 V battery system
Cons
- Heavy at 32 kg
- Higher price point
The Stihl RMA 2 RT is a powerful wheeled mower designed for large, steep lawns. It features a 50 cm cutting width and rear-wheel drive, which provides excellent traction on inclines up to 25 degrees. The 36 V battery delivers up to 45 minutes of runtime, enough for a 500 sq m lawn.
Owner reviews highlight its build quality and ability to cut thick grass on slopes without stalling. The weight makes it harder to push uphill, but the rear-wheel drive compensates. It is the best choice for those with a large steep garden who need a traditional mower.
Ryobi RLM36X46S50
Best Value for Steep LawnsPros
- Affordable price
- Large 46 cm deck
- Self-propelled mode
Cons
- Only 20-degree slope rating
- Plastic deck feels less durable
The Ryobi RLM36X46S50 is a self-propelled cordless mower that offers great value for moderately steep lawns. It has a 46 cm cutting width and a 36 V battery that runs for up to 40 minutes. The self-propelled system helps reduce effort when pushing uphill.
Owner reviews note that it handles gentle slopes well but struggles on steeper inclines above 20 degrees. The plastic deck keeps weight down to 25 kg. For the price, it is a solid choice for those with mild to moderate slopes.
Bosch Rotak 32 LI
Best for Small Steep GardensPros
- Very light at 13 kg
- Compact for small gardens
- Bosch battery ecosystem
Cons
- Low slope rating of 15 degrees
- Small cutting deck
The Bosch Rotak 32 LI is a lightweight cordless mower ideal for small, steep gardens. At just 13 kg, it is easy to carry up and down slopes. The 18 V battery provides enough power for a small lawn up to 200 sq m.
Owner reviews appreciate its manoeuvrability on tight slopes and the quality of cut. However, it is only rated for 15-degree slopes, so it is best for gentle inclines rather than steep hills. It is a great choice for those with a small garden who already own Bosch 18 V tools.
Makita DLM432Z
Best for Battery EcosystemPros
- Uses dual 18 V batteries
- Compatible with Makita LXT range
- Good build quality
Cons
- No self-propelled option
- Batteries sold separately
The Makita DLM432Z is a dual-battery cordless mower that runs on two 18 V LXT batteries, providing ample power for slopes up to 20 degrees. It has a 43 cm cutting width and weighs 22 kg. The mower is well-balanced and easy to push on moderate inclines.
Owner reviews highlight its reliability and the advantage of sharing batteries with other Makita tools. The lack of self-propulsion means more effort on steep hills, but the dual battery system ensures consistent power. It is the best choice for those invested in the Makita ecosystem.
FAQs
Can I use a standard cordless mower on a steep lawn?
Only if the mower is rated for the slope angle. Most standard mowers are rated for 15-20 degrees, while specialist models go up to 35 degrees.
What is the safest cordless mower for a steep hill?
A robotic mower like the Flymo EasiLife 600 Go is safest because it operates autonomously and is lightweight, reducing the risk of slipping or tipping.
Do I need a self-propelled mower for a slope?
Yes, self-propelled mowers reduce the effort required to push uphill and provide better traction on steep gradients.
How do I measure the slope of my lawn?
Use a smartphone inclinometer app or a spirit level with a protractor. Place it on a board laid on the slope and read the angle.
What battery voltage is best for steep lawns?
Higher voltage batteries (36 V or 40 V) provide more torque for climbing. 18 V mowers are suitable only for gentle slopes.
Can I mow sideways on a slope?
It is safer to mow up and down the slope rather than sideways to reduce the risk of the mower tipping over.
Do robotic mowers work on steep lawns?
Yes, models like the Flymo EasiLife 600 Go are specifically designed for slopes up to 35 degrees and work autonomously.
What wheel size is best for a steep lawn?
Large rear wheels (250 mm or more) with deep treads provide better traction and stability on slopes.
How long does a cordless mower battery last on a slope?
Battery life is typically 30-60 minutes on a slope, depending on voltage and grass thickness. Steep slopes drain batteries faster.
Is a heavier mower better for steep lawns?
No, a lighter mower is easier to push uphill and less likely to tip. However, it must have good traction to avoid sliding.
Our verdict
For most steep lawns, the Flymo EasiLife 600 Go is the best overall choice due to its lightweight design and 35-degree slope rating. If you prefer a traditional wheeled mower for a large steep garden, the Stihl RMA 2 RT offers the best combination of deck size and rear-wheel drive. For budget-conscious buyers, the Ryobi RLM36X46S50 provides good value for moderate slopes.