The EGO POWER+ 21″ Cordless Electric Lawn Mower Kit, Self-Propelled – LM2135SP wins on its 56V platform rather than any one feature of the mower: the large pack in the kit gets you through a half acre without a battery swap. Cordless mowers stopped being a compromise a few model years ago, and in 2026 the question is no longer whether a battery mower can cut your grass but which battery platform matches your yard. The answer changes a lot between a flat quarter-acre and a sloped half-acre, and the mowers that suit each are not close to the same machine. These five picks run from a basic push mower up to a Honda-built walk-behind, with one pick per situation rather than a long list of near-duplicates. Every pick below was re-verified as in stock on Amazon today.
Best Overall: EGO POWER+ 21" Cordless Electric Lawn Mower Kit, Self-Propelled – LM2135SP
This is the mower most reviewers still hand the overall win to, and the reason is the 56V ARC Lithium platform rather than any one feature of the mower itself. The 7.5Ah pack in the kit is a genuinely large fuel tank by cordless standards, which is what gets you through a half-acre without a battery swap, and the Select Cut system lets you stack a second blade to change how aggressively it mulches instead of forcing one compromise cut. Touch Drive puts the self-propel control on the handle so you set walking speed with a thumb rather than a lever. The tradeoff is price: this is among the most expensive walk-behinds here, and if you have no other EGO tools you are paying a platform premium for a battery you may only ever use in one machine.
Best Budget: SKIL PWR CORE 40 Brushless 40V 20-Inch Push Mower Kit – PM4910-15
The cheap end of the cordless market is usually cheap because the deck shrinks to 16 or 17 inches and the included battery is a token 2.0Ah, and this SKIL avoids both. You get a full 20-inch deck and a 6.0Ah pack in the kit, which is a lot more machine per dollar than the 16-inch mowers at a similar price, and the brushless motor means it is not the sort of budget mower that bogs the moment grass gets damp. It is a push mower, so a slope will make you work, and SKIL’s PWR CORE 40 tool range is thinner than EGO’s or Greenworks’ if you plan to build out a battery system. For a flat yard up to about a quarter-acre where you just want the mowing done, none of that matters.
Typically: $225–$300 | Check current price on Amazon
Best for Half-Acre Yards: Worx 40V 21" 3-in-1 Cordless Lawn Mower, WG752
Worx builds this around two 20V packs running in series, which keeps the batteries interchangeable with the rest of the Power Share range and keeps the price well under the 56V and 80V self-propelled mowers. The 21-inch deck is the same width as the premium picks, so you cover ground at the same rate, and the 3-in-1 head mulches, bags or side-discharges without buying anything extra. What you give up is drive: pushing a 21-inch deck across a half-acre is real work, and the two smaller packs do not hold as many watt-hours as a single large 56V battery, so a genuinely tall half-acre may need a mid-mow charge. On flat ground with a normal cutting schedule it is the most deck for the money here.
Best for Hills and Thick Grass: Greenworks 80V 21in Self-Propelled Lawn Mower, 4.0 Ah Battery and Charger
Slope is the one condition where cordless mowers separate sharply, because a self-propelled drive that is merely adequate on flat ground will slip or stall on a bank. Greenworks’ 80V platform is the highest-voltage consumer system on this list and it shows in torque under load, which is what keeps blade speed up in thick or damp grass instead of letting the motor lug. Paired with rear-wheel self-propel, it climbs the kind of yard that turns a push mower into a workout. The catch is the included 4.0Ah battery, which is modest for the voltage and will limit you to roughly a quarter-acre per charge, so a second pack is close to mandatory if your hilly yard is also a big one.
Typically: $400–$550 | Check current price on Amazon
Best for Large Lawns: Honda HRX-BE 21-Inch Walk Behind Battery Powered Lawn Mower (HRX217YXBEXA6)
Honda spent decades building the walk-behind most landscapers would name as the durable one, and this is that machine with the engine taken out. The deck, drive and cut quality come from the gas HRX line rather than from a cordless mower designed down to a price, which is the whole argument for it: on a three-quarter-acre lawn mowed thirty times a season, the parts that wear out are the deck, the wheels and the transmission, not the motor. It is also by a wide margin the most expensive pick here, and paying that much only makes sense if your lawn is large enough that a mid-tier mower would be replaced in five years anyway. On a quarter-acre it is money that buys you nothing the EGO does not already do.
| Model | Deck / cut width (in) | Battery in the kit | Watt-hours published | Manufacturer runtime claim |
|---|---|---|---|---|
| EGO POWER+ LM2135SP | 21 deck (cut width not published) | 56V, 7.5 Ah | Not published | Up to 60 minutes with the recommended 7.5 Ah pack |
| SKIL PWR CORE 40 PM4910-15 | 20 deck (cut width not published) | 40V, 6.0 Ah | Not published | Up to 60 minutes with the included 6.0 Ah pack |
| Worx WG752 | 21 deck, 20 cut | 40V max (two 20V 5.0 Ah packs) | Not published | Not published as a time; up to 1/2 acre per charge |
| Greenworks 80V 21-inch Self-Propelled, LM2108S or LM2138S | 21 deck (cut width not published) | 80V, 4.0 Ah | Not published | Up to 33 minutes (LM2108S) or up to 45 minutes (LM2138S) |
| Honda HRX217YXBEXA6 | 21 cut | 12 Ah included, two bays | 1.2 kWh / 24 Ah maximum, both bays filled | Up to 45 minutes on the included battery, plus 45 more on an optional second 12 Ah |
Four of those five cells are blank for the same reason, and digging until the blank itself is the finding is how we work through a category.
The number to compare across cordless mowers is not volts, it is watt-hours, and almost nobody prints it. Multiply volts by amp-hours: a 56V 7.5Ah pack is 420Wh, while a 40V 6.0Ah pack is 240Wh, so the 56V mower has roughly three-quarters more energy on board even though the headline voltage is only 40 percent higher. Volts tell you how hard the mower can pull in thick grass, amp-hours alone tell you nothing without the voltage, and watt-hours tell you how long you will actually be mowing. The mistake that costs people the most is sizing the deck to the yard and then accepting whatever battery happens to be in the box, which is how someone ends up with a 21-inch mower and a 2.0Ah pack that dies two-thirds of the way through a yard the deck was perfectly capable of handling. Work out your watt-hours first, then pick the deck.
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