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The Stihl RMA 443 C is a capable cordless rotary mower for a medium domestic lawn, provided you identify which generation you are buying. Which? recorded 38 minutes of battery life for the older RMA 443 C, while STIHL’s current RMA 443 page describes an AK-system variant with area estimates of up to 230 m² on an AK 20 battery or 300 m² on an AK 30 S. Those are different reference points, not interchangeable promises. The mower is push-along rather than self-propelled, has a 41 cm cutting width in the current specification, supports collecting, rear discharge, side discharge and mulching, and uses a central height adjustment. It is a sensible choice for owners who already use the matching battery platform or whose lawn fits one battery charge; buyers of a bare tool must budget for a compatible battery and charger.
What is the Stihl RMA 443 C?
The RMA 443 C is a battery-powered, push-along rotary lawn mower designed for domestic gardens. It has no drive motor for the wheels, so you provide the forward motion. That keeps the mechanism relatively straightforward, but it also means that a heavy or sloping lawn demands more physical effort than a self-propelled mower.
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There is an important naming issue. The model tested by Which? is an older C-era reference associated with STIHL’s AP battery system, while STIHL’s current RMA 443 product page presents a newer AK-system family variant. Published specifications differ between those references. Treat “RMA 443 C” as an exact model-and-platform question rather than assuming every listing describes the same machine.
Which RMA 443 specifications are current, and which belong to the older C listing?
The table separates the figures so you can match a retailer’s listing to the correct mower. The older figures come from Which?’s RMA 443 C coverage; the current figures come from STIHL’s RMA 443 AK-system page.
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| Specification | Older RMA 443 C reference | Current RMA 443 AK-system page |
|---|---|---|
| Cutting width | 43 cm, according to the historical Which? listing | 41 cm (16 in) |
| Cutting-height range | 25–75 mm | 20–100 mm |
| Height positions | Six settings | Central adjustment; the page does not state a number of positions |
| Grass catcher | 55 litres | 52 litres with a fill-level display |
| Tool weight | 21 kg | 24 kg without battery |
| Battery information | One lithium battery was included in the historical description; storage for a spare was noted | AK 20 or AK 30 S options |
| Coverage estimate | Suitable for a 50–150 m² medium lawn in the historical description | Up to 230 m² with AK 20, or up to 300 m² with AK 30 S |
Do not combine the 43 cm/55-litre/21 kg figures with the AK 20 or AK 30 S area estimates. Confirm the model suffix, battery platform, charger, catcher part number and tool weight on the box or dealer invoice before paying.
Is the Stihl RMA 443 C any good?
It is a good fit for a medium-sized, mostly level domestic lawn when you value cordless operation and already own compatible batteries. Its useful cutting range, four mowing modes, large catcher and foldable handle make it versatile. The main reservations are the push-only chassis, the cost of a battery-and-charger bundle if you do not have one, and the confusion between the older C/AP specification and the current AK variant.
What it does well
- Cordless convenience: there is no mains cable to manage and no petrol engine to start or fuel.
- Flexible mowing: STIHL lists collecting, rear discharge/drop, side discharge and mulching modes for the current RMA 443 family.
- Central height adjustment: one control changes the cutting height, rather than requiring separate wheel-by-wheel adjustments.
- Useful catcher capacity: the current specification gives a 52-litre box with a fill-level display; the older C listing gives 55 litres.
- Storage-friendly design: the comfort handlebar folds, and the older description notes storage space for a spare battery.
- Efficiency-focused hardware: STIHL describes an eco mode and flow-optimised blades intended to reduce resistance and extend battery use.
Where it is less suitable
- No powered drive: you must push the machine, especially noticeable on slopes, long grass or when the catcher is full.
- No roller: the Which? specification does not list a rear roller, so it is not aimed at producing traditional striped patterns.
- No smart compatibility: the Which? specification does not list app or smart-mower functions.
- Variant-dependent ownership cost: battery, charger and tool may be sold together or separately, and the correct platform depends on the exact generation.
How large a lawn can the RMA 443 C mow?
Use the published area figures as planning limits, not guarantees. The historical Which? description places the C-era mower in the 50–150 m² medium-lawn category. STIHL’s current AK-system page estimates up to 230 m² with an AK 20 or up to 300 m² with an AK 30 S.
| Situation | Published guidance | How to use it |
|---|---|---|
| Older C-era mower | 50–150 m² medium lawn | Use this only when the machine is the older C/AP reference described by Which? |
| Current AK-system variant with AK 20 | Up to 230 m² | A manufacturer estimate for the current model; actual coverage varies with conditions. |
| Current AK-system variant with AK 30 S | Up to 300 m² | Choose this larger battery when your lawn approaches the upper end of the estimate and the battery is supported by your exact mower. |
Measure the grassed area rather than the whole plot: exclude patios, beds, paths and buildings. If your lawn is close to a stated limit, leave margin for overlapping passes, wetter or longer grass and battery ageing. A spare compatible battery can avoid waiting for a recharge, but its price and charger requirements depend on the platform.
How long does the battery last?
Which? reports 38 minutes of battery life for its tested RMA 443 C, on a page last checked in November 2025. That is an independent test result for the reviewed C-era mower, not a universal runtime for every RMA 443 sold today. STIHL instead publishes area estimates for the current AK-system model: up to 230 m² with an AK 20 and up to 300 m² with an AK 30 S.
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Runtime changes with grass height, moisture, density, slope, cutting-height setting, blade sharpness, wheel resistance and battery condition. Raising the deck for long grass, mowing when the surface is dry and keeping the blade in good condition can reduce load, but no single runtime figure covers all gardens. Do not convert the 38-minute test into a guaranteed area, or the area estimates into a guaranteed number of minutes.
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- Identify the battery platform printed on the mower and battery: the older C/AP reference and current AK variant are not interchangeable assumptions.
- Compare your measured lawn area with the estimate for the exact battery option, leaving a margin for difficult conditions.
- Check whether the listing includes a battery and charger. A “tool only” package may look cheaper but cannot be used until you buy the matching power system.
- If one charge is marginal, price a second compatible battery and verify that your charger can support the batteries you intend to use.
What cutting and collection features does it have?
The current RMA 443 description combines a 41 cm deck with a central 20–100 mm height range. The older C-era listing instead gives a 43 cm deck, six height settings and a 25–75 mm range. A wider deck can reduce the number of passes on open lawn, while a broader height range gives more scope to raise the cut in long or stressed grass; those observations do not make the two generations identical.
Four mowing modes
- Collect: clippings enter the catcher for a tidier finish.
- Rear discharge or drop: clippings are released behind the mower where collection is unnecessary.
- Side discharge: useful when distributing clippings across an area that will be cut again or left to decompose.
- Mulch: clippings are finely recirculated and returned to the lawn when conditions and mowing frequency suit mulching.
STIHL describes a fill-level display on the current 52-litre catcher, which helps indicate when emptying is needed. The older C listing specifies a 55-litre box, so replacement catchers and capacity claims should be matched to the exact part number rather than assumed from the family name.
Blade and eco-mode claims
STIHL says its flow-optimised blades reduce resistance and that eco mode is intended to extend battery use. These are design intentions from the manufacturer, not a promise of a fixed percentage improvement. Keep the blade clean and sharp, and follow the manual’s instructions before any inspection or maintenance.
Is it easy to push, carry and store?
The mower has smooth-running wheels and a height-adjustable, foldable comfort handlebar according to STIHL. Those features help with setup and storage, but they do not turn it into a self-propelled machine. The Which? specification identifies the format as push-along and lists no roller.
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Weight depends on the generation: Which? lists 21 kg for the older C reference, while STIHL lists 24 kg for the current tool without a battery. The battery adds to the lifting weight. Plan where you will store and charge it, and avoid judging portability from a bare-tool figure when the battery is fitted.
Who will find the handling acceptable?
- Owners of level or gently undulating lawns who are comfortable walking behind a push mower.
- People who want a foldable handle for a shed or garage and can lift the machine safely.
- Gardeners who prefer to choose between collecting, discharging and mulching rather than using one fixed mode.
Who should consider a different format?
- Anyone who needs powered assistance on sustained slopes or wants the mower to move at a controlled drive speed.
- Anyone whose priority is a pronounced striped finish from a rear roller.
- Owners of lawns substantially beyond the relevant battery estimate who do not want to swap or recharge batteries during a session.
Does the RMA 443 C include a battery and charger?
There is no single answer without the exact sales package. The historical Which? description refers to one lithium battery, while STIHL’s current page lists AK 20 or AK 30 S battery options. Retailers may offer a complete kit or a tool-only package. Read the contents line for the mower, battery model, charger model and any catcher or mulch accessory before comparing prices.
Because the available data does not establish a current price, treat any amount shown by a retailer as time- and region-specific. Compare the total cost of a usable kit, not just the mower body. Also check local dealer support for blades, catchers, batteries and chargers; those parts may differ between the C/AP and AK generations.
What should you compare before choosing this mower?
| Buying question | Why it matters for the RMA 443 C | What to verify |
|---|---|---|
| Is your lawn within one charge? | Published coverage differs by generation and battery. | Measure the grassed area and match it to the exact battery estimate. |
| Do you need powered drive? | This is a push-along mower. | Test the effort on your slopes and with a full catcher; choose self-propelled equipment if pushing is a concern. |
| What cutting width and height do you need? | Older and current specifications differ. | Confirm the deck width and height range on the specific product code. |
| How often will you empty the catcher? | Capacities are listed as 55 litres for the older C reference and 52 litres for the current page. | Check the catcher size and fill indicator supplied with your model. |
| Do you already own compatible batteries? | Battery-platform compatibility affects the real purchase cost. | Match the AP or AK system and charger, not just the RMA 443 name. |
| Is service nearby? | Blades, batteries, chargers and catchers are consumable or replaceable items. | Confirm an authorised local support route and part availability. |
How do you identify the correct variant before buying?
Use this check when a listing uses “RMA 443,” “RMA 443 C” or a photograph that does not show the battery compartment clearly.
- Read the full model designation: record every suffix and the product or part number, not just the family name.
- Check the battery system: determine whether the package is built around the older AP reference or the current AK system.
- Match the specification: a 43 cm deck, 55-litre catcher and 21 kg figure point to the older Which? C-era description; a 41 cm deck, 52-litre catcher and 24 kg bare-tool figure align with the current STIHL page.
- Confirm height adjustment: the older listing gives 25–75 mm and six settings; the current page gives 20–100 mm with central adjustment.
- Inventory the box: write down whether the battery, charger, catcher and mulch or discharge parts are included.
- Ask the dealer about parts: verify that replacement batteries, blades and catchers correspond to the same generation.
What does independent testing actually establish?
Which? says its full review assesses cutting on standard, long, rough and wet grass; handling on uneven and sloping ground; grass collection; ease of use; quietness; battery life; and energy efficiency. The accessible listing does not expose all individual scores, so it is not possible to state an overall rating or claim a Best Buy or Don’t Buy status from that page.
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The usable independent result is the reported 38-minute battery-life figure for the tested RMA 443 C. For cutting quality, slope handling, noise and energy efficiency, use the test categories as questions to investigate rather than as unstated verdicts. Your own lawn conditions can produce a different result from a controlled test.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How do you use and maintain it safely?
The STIHL instruction manual covering the RMA 443 C and related RMA 443 variants warns that the blade is sharp and may continue moving after controls are released. It instructs users to remove the safety plug before maintenance. Follow the manual for cleaning, inspection and any blade work rather than improvising a service interval.
- Stop the mower and wait for blade movement to cease before approaching the underside.
- Remove the safety plug before maintenance, cleaning or clearing a blockage as directed by the manual.
- Keep hands and feet away from the cutting area and do not rely on the motor appearing silent.
- Use only the battery and charger specified for your exact platform and model.
- Inspect the blade, housing, wheels and catcher for damage before mowing.
- Keep the battery, charger and mower dry as required by the operating instructions.
- Dispose of the old mower, battery, charger and accessories through the appropriate local route; STIHL’s manual states: “Ensure that old machines (lawn mower, battery, charger, accessories) are properly disposed of.”
Do not infer a fixed blade-change or cleaning interval from the review. The correct schedule depends on the manual, operating conditions and the condition of the parts.
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Advantages
- Cordless operation without a mains cable or petrol engine.
- Four current mowing modes, including mulching and side discharge.
- Central height adjustment and a foldable, height-adjustable handlebar.
- Large catcher capacities for this class, with a fill-level display on the current page.
- Eco mode and flow-optimised blade design aimed at reducing cutting resistance.
- A choice of battery capacities on the current AK-system variant.
Disadvantages
- Push-only operation can be tiring on slopes, rough ground or long grass.
- Published specifications vary enough between generations to make casual comparison risky.
- The battery and charger may not be included, and the platform determines compatibility.
- No roller or smart compatibility is listed in the Which? specification.
- The independent page does not provide all scores, so broad claims about cutting, noise or handling are not supported.
Who should buy the Stihl RMA 443 C?
Choose it when you have a domestic lawn in the medium-size range, prefer cordless mowing, can push the machine comfortably and can verify the battery bundle. It is especially logical when you already own the matching battery platform, because the mower can then be evaluated as an additional tool rather than the start of a new battery system.
Pause before buying if your lawn is steep, frequently rough or larger than the relevant area estimate. In those cases, compare a self-propelled mower, a model with a larger battery system or a machine that can complete the area without a battery change. Also pause if a listing does not identify the generation, because the 41 cm/52-litre/24 kg AK figures and the 43 cm/55-litre/21 kg C-era figures describe different references.
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Final verdict: is the RMA 443 C worth it?
The RMA 443 C is worth considering as a practical cordless mower for a medium domestic lawn, but only after you verify the exact variant and total kit contents. Its strengths are flexible mowing modes, a useful catcher, central height adjustment and battery operation. Its limits are the push-only chassis, generation-dependent specifications and the possibility that battery and charger costs sit outside the advertised mower price. Treat Which?’s 38-minute result and STIHL’s 230 m²/300 m² estimates as separate, model-specific evidence, then choose the battery and package that leave realistic margin for your lawn.
Frequently Asked Questions
Can I use the same battery in every RMA 443 mower?
No assumption is safe from the family name alone. The older C-era reference is associated with an AP-system description, while the current STIHL page specifies AK 20 and AK 30 S options; confirm the platform and part numbers for your exact tool.
Is mulching included with every package?
STIHL lists mulching as one of the current RMA 443 family’s mowing modes, but package contents can vary. Check that the required mulch insert or accessory is included for the specific model code you are buying.
What should I do if the mower stops before finishing my lawn?
First check whether the lawn exceeds the estimate for your battery, or whether wet, long grass and a blunt blade are increasing load. Recharge or fit a verified compatible spare, raise the cutting height for difficult growth and inspect the mower only after removing the safety plug as instructed in the manual.
Does a larger catcher make the mower self-propelled?
No. Catcher capacity affects how often you empty it, not wheel drive. The RMA 443 remains a push-along mower, so the effort of moving it increases as the catcher fills.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
