Before you buy an Einhell cordless mower, three things decide whether you get the right machine: the size of your lawn, whether the price includes batteries or not, and which battery capacity comes in the box. Get those right and Einhell is one of the better value routes into cordless mowing, because every tool in its Power X-Change range shares the same batteries. Get them wrong and you can end up with a deck too small for your garden, or a bargain mower that arrives with no battery to run it. This guide walks through exactly what to check so you order once and order correctly.
How the Power X-Change Battery System Works
The single most useful thing to understand about Einhell is the Power X-Change system. It is a range of interchangeable 18 volt batteries that fit every tool in the line, from drills and hedge trimmers to leaf blowers and mowers. The larger mowers are described as 36 volt, and they achieve that by running two 18 volt batteries together in series, which doubles the voltage. The practical upshot is that the batteries are not locked to the mower. If you already own Einhell power tools, their batteries will run the mower, and the mower’s batteries will run those tools.
This is why the battery question is the first one to settle. Many Einhell mowers are sold in two forms: a full kit that includes the batteries and charger, and a cheaper version labelled Solo or body only, which is the bare mower with no battery or charger at all. The Solo price looks like a bargain until you realise it only makes sense if you already have Power X-Change batteries on the shelf. Buy a Solo mower with no batteries to put in it and you have an expensive paperweight until a separate battery pack arrives.
Matching the Model to Your Garden Size
Einhell’s mower range is organised mainly by cutting width, and matching that to your lawn is what keeps mowing quick rather than tedious. The wider the deck, the fewer passes you make, but the heavier and more expensive the machine.
- The GE-CM 18/30 Li runs on a single 18 volt battery, has a 30cm (12 inch) cutting width, and suits small lawns up to roughly 200 square metres (about 2,150 square feet).
- The GE-CM 33 Li steps up to a 33cm (13 inch) deck for small to medium lawns.
- The GE-CM 36/37 Li is the popular middle choice, with a 37cm (14.5 inch) cutting width, a 45 litre grass box, and six cutting heights from 25 to 75mm (1 to 3 inches), comfortable on lawns up to around 400 square metres (about 4,300 square feet).
- The RASARRO and larger 36/40 models widen the deck again for bigger gardens.
- The self-propelled GP-CM 36/47 S HW Li drives itself forward, takes a 47cm (18.5 inch) cut and a 75 litre bag, and is built for large lawns up to around 700 square metres (about 7,500 square feet).
As a rough rule, undersizing the deck makes a big lawn a chore, while oversizing it makes a small lawn awkward to manoeuvre and wastes money on capacity you never use. The self-propelled option is worth the extra outlay on a large or sloping lawn, where pushing a heavy mower for half an hour stops being pleasant, but it is unnecessary on a compact, flat plot.
What to Check on the Spec Sheet
Once you have the right deck size, a few specification details decide how well the mower actually performs. Battery capacity, measured in amp-hours (Ah), sets the runtime. A 2.0Ah pack is fine for a small lawn, but for a medium or large one you want 4.0Ah or higher, because capacity is what determines how many square metres you can cut before the battery runs flat. Two 4.0Ah batteries on a 36 volt mower will typically clear a medium lawn on a single charge, where smaller packs leave you waiting for a recharge halfway through.
Check the motor type as well. A brushless motor, fitted to the higher models, runs more efficiently than an older brushed motor, which means more lawn cut per charge and a longer working life, because there are no carbon brushes to wear out. Look too at the grass box volume, since a small box on a large lawn means constant stops to empty it, and at the spread of cutting heights, because a good range lets you cut high in a drought and lower for a fine finish. Finally, confirm whether the model is push or self-propelled, and whether it includes a mulching plug if you want the option of returning clippings to feed the lawn.
Where Einhell Sits on Price and Value
Einhell’s appeal is that it undercuts the premium cordless brands while still sharing batteries across a whole tool range. As a guide, the small GE-CM 18/30 Li kit costs around £150 (about $190), the popular GE-CM 36/37 Li as a full kit with two batteries and a charger runs around £250 to £300 (about $320 to $380), and the Solo body-only version of the same mower drops to around £130 (about $170) for owners who already have batteries. The self-propelled GP-CM 36/47 sits higher again. They are stocked at B&Q, Amazon, Screwfix, and Einhell’s own outlets, and pricing shifts with seasonal offers, so it is worth checking the current figure against the model code before buying.
The value calculation changes completely depending on whether you are buying into the system or already in it. A first-time buyer should usually choose the full kit, so the batteries and charger are covered. Anyone who already owns Power X-Change tools should look hard at the Solo versions, because reusing existing batteries can knock a third or more off the price. For a broader view of how cordless stacks up against the alternative, our guide on battery or petrol mower, which one actually fits your garden is a useful companion.
Two small practical points are worth checking before you commit, because they shape day-to-day use. The first is weight. Cordless mowers carry their batteries on board, so a 36 volt machine with two 4.0Ah packs is heavier than it looks on paper, and on a small lawn a lighter single-battery model is easier to push and lift. The second is the start system. Einhell mowers use a removable safety key plus a two-handed start, which prevents the blade firing up accidentally, so keep the key separate from the mower if children are around. Neither point rules a model in or out, but both are easier to weigh up before purchase than after.
Getting the Longest Life From the Mower and Battery
The batteries are the most valuable part of a cordless mower, so how you treat them decides how long the whole system lasts. Lithium-ion packs last longest when they are not stored fully flat or fully charged for long periods, so over winter leave them at around half charge in a cool, dry place rather than empty or full. Avoid leaving a battery sitting on the charger in a hot shed through summer, because heat is what degrades lithium cells fastest, and charge indoors at room temperature rather than in freezing conditions. Letting a warm battery cool before charging, and a hot mower rest before its next pass, both help the cells age gracefully.
The mower itself rewards the same regular care as any other. Cut dry grass rather than wet, which is easier on the motor and gives a cleaner finish, keep the underside of the deck clear of caked clippings so airflow lifts the grass into the blade, and store the machine somewhere dry. Looked after this way, an Einhell cordless mower delivers quiet, fume-free cutting for years, and the shared battery system means each new tool you add to the range gets cheaper because you already own the power. If you are still weighing cordless against other options entirely, our guide on why battery mowers have become the best choice for most gardens lays out the wider case.
