Cordless Lawn Mower vs Petrol: Which Should You Choose?

For most small to medium yards, a cordless mower is the easier choice. It starts with a button, needs little upkeep and is quieter. Petrol still makes sense for very large lawns, thick or overgrown grass, and anyone who wants to refuel in a minute and keep going without managing batteries.

The short version

Cordless (battery or electric) and petrol (gas) mowers both cut grass well. The real difference is how they fit your life. A cordless mower trades unlimited runtime for convenience. A petrol mower trades convenience for the freedom to mow as long as you have fuel.

If your lawn is under about three quarters of an acre and you want a mower that is simple to start and store, cordless is usually the better match. If you mow a big property, cut tall wet grass often, or already own the fuel and tools to maintain an engine, petrol remains a sensible pick.

The sections below walk through the factors that decide it: lawn size, power, weight, upkeep, noise, fuel and safety.

Side-by-side comparison

This table sums up the general differences. Individual models vary, so treat it as a starting point and check the spec sheet of any mower you are considering.

Factor	Cordless	Petrol
Starting	Press a button or squeeze a bar	Pull cord or push-button start, sometimes needs priming
Runtime	Limited by battery, swap or recharge	Limited only by the fuel tank, refill in minutes
Maintenance	Keep blades sharp, clean the deck, care for batteries	Oil, spark plug, air filter, fuel care, blade sharpening
Noise	Much quieter	Loud, hearing protection is wise
Exhaust	None while mowing	Exhaust fumes and fuel smell
Storage	Often folds small, no fuel to store	Needs fuel handling and a ventilated space
Best for	Small to medium yards	Large lawns and heavy, rough grass

Lawn size and runtime

Runtime is the biggest practical limit on a cordless mower. Makers list it in minutes or in acres per charge, and you cannot compare the two directly. For example, the EGO LM2135SP lists 60 minutes of runtime, while the Greenworks MO60L424 is rated for up to 0.75 acre per charge. Both are makers' figures, and listings note that results vary with grass and technique.

Leave a margin. If your lawn takes close to the rated runtime, wet or thick grass could leave you with a strip uncut. A second battery solves this. The Greenworks MO60L424 comes with 2 batteries, while the EGO LM2135SP comes with 1.

A petrol mower has no such ceiling. Fill the tank and keep going. If your yard is large enough that you would need several battery swaps, petrol saves you planning. Our best cordless lawn mower page lists runtime and acreage ratings side by side, which helps you see whether a model covers your yard in one go.

Power, weight and handling

Petrol engines have long been the standard for tough jobs, such as tall, dense or damp grass. Modern brushless cordless motors have closed much of the gap for ordinary home lawns, and several makers say their mowers rival gas power. Treat those claims as marketing until you compare your own conditions, since grass type and height matter more than any label.

Weight is where cordless often wins, but not always. A light push mower such as the EWORK 40V 14 in. weighs 21 lb. Self-propelled cordless mowers are heavier: the ones on our page run from 55.3 lb to 74.95 lb. Self-propelled drive pulls the mower for you, so weight matters less while mowing. It still matters when you lift it into a car, turn it in a tight spot or carry it up steps.

Cutting width also shapes the job. Most full-size cordless models cut 21 in, while compact ones cut 14 in to 16 in. A wider deck means fewer passes but is harder to fit through gates. If your yard has hills, a self-propelled mower of either type is easier to push. Browse our best self propelled lawn mower page to compare drive types.

Upkeep, noise and fuel

This is where cordless pulls ahead for many people. A cordless mower has no oil to change, no spark plug and no stale fuel. You charge it, mow, clean the deck and store it. A petrol mower needs regular care to start reliably, and fuel left sitting through winter can cause trouble if not handled correctly.

Noise is the other big gap. Cordless mowers are noticeably quieter, so early or late mowing bothers neighbors less. Makers like Greenworks advertise their models as several times quieter than gas, but exact comparisons depend on the models. Quieter does not mean silent, though. The blade still throws debris, so wear eye protection either way.

Batteries have their own care routine:

Store them somewhere cool and dry, away from direct sun and freezing temperatures.

Use the charger that came with the mower.

Check the charge time before buying. The EGO LM2114 lists 80 minutes for its included battery, for example.

Replace damaged batteries rather than using them.

Store batteries somewhere cool and dry, away from direct sun and freezing temperatures.
Use only the charger made for your battery.
Check charge time on the listing before you buy. The EGO LM2114 lists 80 minutes for its included battery.
Stop using a battery that is swollen, cracked or damaged.

Safety notes

Every mower can cause injury, so a few habits apply to both types.

Wear sturdy closed shoes and eye protection. Clear sticks, stones and toys before you start. Never reach under the deck or clear a clog while the mower is running. For a cordless mower, remove the battery or safety key first. For petrol, switch off the engine and disconnect the spark plug lead if you will be working near the blade.

With petrol, add a few more rules. Refuel outdoors, with the engine off and cool, and keep fuel away from flames and sparks. Never run the engine in a closed garage, because exhaust contains carbon monoxide. Store fuel only in approved containers. Hearing protection is a good idea with a loud petrol engine.

With cordless, keep chargers and batteries dry, and do not charge them on a flammable surface or leave them charging unattended for long periods. Slopes call for care with any mower: mow across a slope with a walk-behind mower only if the manual says it is safe, and never mow wet grass on a steep hill.

How to decide

Run through these questions in order:

1. How big is your lawn? If a single charge covers it with room to spare, cordless is an easy fit. If it takes several batteries, consider petrol or buy extra batteries.

2. How tough is your grass? Tall, wet or neglected grass favors more power and longer runtime.

3. Who will use it, and where will it live? A light, foldable mower suits small sheds and anyone who struggles with heavy lifting.

4. Do you want to maintain an engine? If not, cordless removes most of that work.

5. Do you own other tools from one battery family? Some makers, such as Greenworks, say their batteries work across many of their other tools, which can make a cordless mower more useful.

Once you have answers, compare real spec sheets. Runtime, acreage, weight, cutting width and included batteries tell you more than any label about power.

Frequently asked questions

Are cordless mowers strong enough for thick grass?

For typical home lawns, many brushless cordless models cope well. Very thick or tall grass drains batteries faster, so expect shorter runtime and consider mowing in two passes at a higher setting.

Can I leave a cordless mower in a cold garage?

Check the maker's manual. In general, batteries do best stored in a cool, dry place and are better kept out of freezing or very hot spots.

Is a second battery worth it?

If your lawn takes most of one battery's runtime, yes. It lets you swap and keep mowing. Some kits already include two, so check what is in the box.

Do cordless mowers mulch and bag like petrol ones?

Many do. Several models list mulching, bagging or both, and bag sizes vary. The EGO LM2114, for instance, lists an 18.5 gal bag.