Best Cordless Lawn Mower Under £300

The Bosch Rotak 34-550 is the most consistent performer in this price bracket. It uses two 18V batteries in series to deliver 36V power, providing strong torque for cutting through thick grass. The aluminium deck keeps weight down to 13.5 kg, making it one of the lightest 36V mowers available. Owner reviews consistently praise the clean cut and the effective leaf mulching feature.

Battery runtime is adequate for medium-sized lawns up to 300 square metres on a single charge with the included 4.0 Ah batteries. The cutting height adjustment is a single lever with six positions, which is convenient. The main drawback is the 40-litre grass box, which fills quickly on larger lawns. However, for most UK gardens, this mower is the best balance of performance, weight, and value under £300.

The Ryobi RLM36X46S40 is designed for larger lawns where cutting width matters. The 46 cm steel deck is the widest in this price range, significantly reducing mowing time. It comes bundled with two 4.0 Ah 18V batteries, giving excellent runtime for lawns up to 500 square metres. The 50-litre grass box is generous and features a fill indicator.

Owner feedback highlights the mower's powerful cutting performance, even in damp conditions. The seven-position cutting height adjustment is easy to use. However, at 17.5 kg, it is heavier than the Bosch Rotak, which can be tiring on uneven ground. The plastic deck on some Ryobi models has raised durability concerns over time, but the steel deck on this model is reassuring. For large, flat lawns, this is the best value option under £300.

The Flymo EasiMow 340 is the lightest mower on this list, making it ideal for small gardens, patios, or for users who prefer an easy-to-manoeuvre machine. It uses a 20V battery system, which is less powerful than 36V models but sufficient for small lawns up to 200 square metres. The 34 cm cutting deck is adequate for tight spaces, and the six-position cutting height adjustment offers versatility.

Owner reviews highlight the mower's ease of use and lightweight design. The grass box is smaller at 30 litres, but for small gardens this is rarely an issue. The main trade-off is the lower power; it struggles with thick or overgrown grass compared to 36V models. For those with a small, tidy lawn who want a mower that is easy to lift and store, the Flymo EasiMow 340 is a solid choice.

The Einhell GE-CM 33/1 Li is the most affordable cordless mower that still delivers acceptable performance for small lawns. It uses a single 18V battery from the Power X-Change system, which is shared with over 300 Einhell tools. The 33 cm cutting deck is narrow but sufficient for small gardens. At 12 kg, it is easy to push and lift.

Owner reviews note that the mower is good value for money but lacks the power of 36V models. It handles regular weekly cuts well but struggles with thick grass. The 30-litre grass box is small and requires frequent emptying. For budget-conscious buyers with a small, well-maintained lawn, the Einhell GE-CM 33/1 Li is a practical choice.

The DeWalt DCMW564P2 uses the 54V FlexVolt battery system, which automatically adjusts voltage to match the tool's demand. This gives it significantly more power than 36V or 18V mowers, making it ideal for thick or overgrown grass. The 36 cm steel deck is robust, and the build quality is typical DeWalt, meaning it is built to last. The mower comes with two 6.0 Ah FlexVolt batteries, providing ample runtime.

Owner reviews praise the mower's power and build quality. It cuts through tough grass with ease and leaves a clean finish. The main drawbacks are weight and cost. At 16 kg, it is heavier than the Bosch Rotak, and the FlexVolt batteries are expensive to replace if lost or damaged. For users who already own DeWalt FlexVolt tools or need maximum cutting power, this is the best choice under £300.