What's inside
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The Stihl RMA 235 is a compact 36V cordless lawn mower with a 33 cm (about 13-inch) cutting width that runs on Stihl’s AK System batteries, and it is designed for small lawns of a few hundred square meters rather than full suburban yards. If your grass area is small, enclosed and you want a light mower that hangs in a shed and shares batteries with Stihl trimmers and hedge cutters, it is a sensible choice; if your lawn is larger, it will feel undersized.
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Key Specifications at a Glance
| Specification | Stihl RMA 235 |
|---|---|
| Battery system | Stihl AK System, 36V |
| Cutting width | 33 cm (about 13 in) |
| Cutting height range | Roughly 25-65 mm (about 1-2.5 in), central adjustment |
| Grass catcher | About 30 litres |
| Housing | Polymer deck |
| Weight | Roughly 14 kg (about 30 lb) without battery |
| Recommended lawn size | Up to a few hundred m² depending on battery |
| Typical price range | Bare unit and kits from roughly $250 to $450 equivalent |
Stihl updates model generations and kit bundles by region, so exact weight and height positions can differ slightly from one version to another. The 33 cm deck and AK battery platform are the defining features.
Batteries: AK 10, AK 20 and AK 30
The RMA 235 runs on Stihl’s AK series, the entry-level 36V packs shared with AK-system trimmers, hedge trimmers, blowers and a compact chainsaw. The bigger the pack, the more lawn per charge.
| Battery | Approx. energy | Approx. lawn per charge in the RMA 235 | Best for |
|---|---|---|---|
| AK 10 | About 70-75 Wh | About 100-150 m² (1,100-1,600 sq ft) | Very small front lawns, top-ups |
| AK 20 | About 140-150 Wh | About 200-250 m² (2,200-2,700 sq ft) | Typical small back garden |
| AK 30 | About 180 Wh | About 250-300 m² (2,700-3,200 sq ft) | Upper end of the mower’s range |
Coverage assumes dry grass cut regularly at a moderate height. Long, wet or very dense grass can reduce it by a third. Owning two packs effectively doubles the practical lawn size, as long as the second is charged.
Where the RMA 235 Fits in the Stihl Range
Stihl’s cordless mowers step up in deck width and battery class. The RMA 235 sits near the bottom with the narrowest deck; larger RMA models use wider decks, steel or more robust housings, self-propelled drive on some versions and the higher-capacity AP System batteries aimed at bigger lawns and professional use. If you already own AP batteries, a larger AP-compatible mower is usually a better match than buying into AK as well.
Availability note
The RMA 235 is mainly marketed in Europe, the UK and other regions where small lawns are common. In the US, Stihl’s dealer network tends to focus on wider-deck RMA models, so availability through local dealers varies.
Is a 13-Inch Deck Enough? A Quick Time Check
At a normal walking pace of about 3.5 to 4.5 km/h with overlap and turns, a 33 cm deck covers roughly 600 to 900 m² per hour. A 200 m² lawn therefore takes about 15 to 20 minutes of mowing. That is comfortable. A 500 m² lawn would take 35 to 50 minutes and two or three battery charges, at which point a 41-46 cm mower would cut mowing time by a third or more.
Who Should Buy It
| Situation | Fit |
|---|---|
| Lawn under about 250 m², flat, few obstacles | Excellent fit |
| Narrow paths and tight corners, steps to the garden | Excellent fit; light enough to carry |
| Already own Stihl AK trimmer or hedge trimmer | Strong fit; reuse batteries |
| Lawn 300-500 m² | Workable with two AK 30 packs, but slow |
| Lawn over 500 m² or steep slopes | Choose a wider, self-propelled mower |
Practical Strengths
- Low weight: easy to lift over steps, carry through a house in a terraced property and hang on a wall.
- Central height adjustment: one control sets all wheels, which is easier than adjusting each wheel separately.
- Grass box with a fill indicator: helps avoid clogging by showing when to empty.
- Quiet operation: battery motors are far quieter than gas, useful for early mowing or close neighbours.
- Shared batteries: one or two AK packs can run the mower, trimmer and hedge trimmer.
Limitations to Be Honest About
- A 30-litre catcher fills quickly in spring; expect to empty it several times on a typical lawn.
- No self-propelled drive, so uphill mowing is all arm and leg work.
- Polymer deck is fine for domestic lawns but less impact-resistant than steel against stones and roots.
- Narrow deck means more passes and more walking on medium lawns.
Maintenance That Keeps It Cutting Well
- Remove the battery first. Always, before clearing clogs or touching the blade.
- Clean under the deck after each use. Wet clippings dry onto polymer and reduce airflow, making collection worse.
- Check the blade monthly in season. Sharpen or replace if edges are rounded or nicked; a dull blade increases battery draw.
- Store batteries indoors over winter at partial charge rather than full or empty.
- Do not hose down the motor area. Brush and wipe instead.
Bottom Line
The Stihl RMA 235 cordless lawn mower is a well-sized tool for small gardens, especially for owners already using Stihl AK batteries. Pair it with an AK 20 or AK 30 for a typical small lawn, and look at a wider Stihl or competitor mower if your grass area is more than roughly 300 m².
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