Stihl HSA 50 Review: The AK Hedge Trimmer That Replaced the HSA 56
If you went looking for the HSA 56, you will not find it on Stihl’s UK site any more. The AK-system hedge trimmer Stihl sells today is the HSA 50: a longer 50 cm blade, the same 36V batteries, and one proper editorial test behind it. Here is what that test, a forum of working arborists and Screwfix’s buyers say — and whether it is worth twice the money of Bosch’s EasyHedgeCut.
Where the reviews line up
The evidence comes from three places: a hands-on test by Expert Reviews, which made it a Best Buy in June 2026; a thread of Stihl battery owners on Arbtalk, the UK tree-surgeons’ forum; and the customer ratings on Screwfix, which has sold Stihl’s battery tools since July 2024. They point the same way.
Three things recur. It cuts cleanly and it is balanced — Expert Reviews calls the cut “exceptionally clean” and credits the forward-mounted battery for comfort, and it went through laurel, tough holly and privet. The run time claim holds up: Stihl says up to 50 minutes on an AK 10, and Expert Reviews ran one for 56 minutes with no load. And the battery is the real purchase: Arbtalk’s first question to anyone choosing a Stihl trimmer is “what batteries do you have?”
The complaints are small but real. Expert Reviews found the blade scabbard flimsy, the 75-minute charge slow, and the rear trigger lock too easy to press by accident. It is also not light: 2.9 kg without a battery on most listings, around 3.7 kg with an AK 10 on our sum — roughly a kilo heavier than the Bosch EasyHedgeCut.
Stihl or Bosch? If your hedge is soft, thin growth cut twice a summer and you own Bosch 18V batteries, the Bosch is the cheaper answer. If you have holly, laurel or anything thicker than a pencil, or you already own AK batteries, the HSA 50 is the better tool: 15–16 mm cutting capacity against the Bosch’s 10 mm, and a run time that has actually been measured.
The three sources this summary is built from
- Expert ReviewsHands-on test by Stuart Milne, 18 June 2026. Best Buy. Measured run time and noise.
- ArbtalkJune 2024 thread of Stihl battery owners, at least four contributors. Small, but people who trim for a living.
- Screwfix5/5 from 10 ratings on the kit and 5/5 from 7 on the bare tool, checked 7 October 2026. Too few to tell you about reliability.
Before the review: the HSA 56 has gone
Stihl’s UK hedge trimmer range, checked on 7 October 2026, lists one AK-system hedge trimmer: the HSA 50, at £124 for the tool. The HSA 56 (45 cm blade) is no longer listed, and nor is the HSA 60 that some owners on Arbtalk were using in 2024. Stihl does not say in so many words that the HSA 50 replaces the HSA 56, but it is now the only trimmer in that slot. If you see an HSA 56 advertised, it is old stock or second-hand. And the HSA 45 is a different, cheaper machine with a built-in battery — it does not take AK packs.
Specification at a glance
| Spec | Figure | Confidence |
|---|---|---|
| Blade length | 50 cm (20 in), double-sided, laser-cut and diamond-ground | Stihl UK. One dealer prints “50cm (600mm)”, which is a typo |
| Tooth spacing | 30 mm (Ron Smith, Ripon Groundcare, Charlies, Toolstop, Screwfix) · 34 mm (Just Lawnmowers) | Stihl’s UK page does not print it. Five listings say 30 |
| Cutting capacity (branch) | 15 mm (Screwfix) · 16 mm (Expert Reviews) | Stihl’s UK page gives no figure |
| Weight, without battery | 2.9 kg (Ron Smith, Ripon Groundcare, Screwfix bare tool) · 3.5 kg (Just Lawnmowers) | Stihl’s UK page gives no weight |
| Weight, with AK 10 | About 3.7 kg (our sum: 2.9 kg + Charlies’ 0.8 kg for the AK 10) · Screwfix’s kit page says 2.9 kg “with battery” | Contested. We think Screwfix’s kit wording is wrong |
| Battery | AK system, 36V. AK 10 recommended; AK 20 and AK 30 fit | Stihl UK |
| AK 10 capacity | 72 Wh (Screwfix) · 2.0 Ah (Toolstop) · 2.5 Ah (Expert Reviews) | 72 Wh at 36V is 2.0 Ah. Expert Reviews may have had a newer pack |
| Run time | Up to 50 min on AK 10 (Stihl) · up to 100 min on AK 20 (Toolstop) · 56 min measured, no load (Expert Reviews) | No load means the blade running in the air, not cutting — real use will be shorter |
| Charge time | 75 minutes, AK 10 | Expert Reviews |
| Stroke rate | 2,800 a minute | Charlies only (labelled “rpm”). Stihl UK does not publish it |
| Noise | Sound pressure 81 dB(A), power 91 dB(A) (Ron Smith; Expert Reviews calls 81 “Stihl’s official figure”) · 78 / 89 dB(A) (Charlies) · 82 dB(A) measured with no load (Expert Reviews) | Contested by 3 dB. We lean to 81, which two sources tie to Stihl |
| Vibration | 2.0 / 1.6 m/s² left/right (Ron Smith, Charlies, Toolstop) · “15 m/s²” (Expert Reviews) | The Expert Reviews figure is probably a misprint for 1.5 |
| Tip protector | Screw-on tip protector, plus a blade scabbard | Stihl UK; Expert Reviews thinks the scabbard is flimsy |
| Length | 1,034 mm | Screwfix |
| In the box | Bare tool: trimmer and blade guard only · Kit: trimmer, AK 10, AL 101 charger, blade guard | Screwfix, Charlies, Ripon Groundcare, Toolstop |
| Guarantee | 2 years domestic use. No registration extension for AK tools | Stihl UK warranty page. Its 3-year extension needs 5 litres of MotoMix fuel, which is a petrol offer |
| Where it is sold | Stihl approved dealers, Stihl’s own site, and Screwfix (battery and electric tools since July 2024) | Stihl UK; Service Dealer, June 2024 |
| RRP | £124 bare tool · £179 kit with AK 10 and AL 101 | Stihl UK for the bare tool; the kit RRP is Charlies’ figure, 7 Oct 2026 |
| Live UK prices, bare tool | £119 Ron Smith · £124 Just Lawnmowers · £142.99 Screwfix | All checked 7 October 2026 |
| Live UK prices, kit | £165 Ripon Groundcare · £174.98 Charlies (“Coming Soon”) · £224.99 Screwfix | All checked 7 October 2026. Screwfix is above the RRP on both |
Expert Reviews
This is the source with numbers. Expert Reviews tested the HSA 50 with an AK 10 battery (it calls it 2.5 Ah) and ran it for 56 minutes with no load, against Stihl’s claim of 50. It measured 82 dB(A) against what it calls Stihl’s official 81, and gives the cutting capacity as 16 mm, “fairly typical”. In the hedge it went through laurel, tough holly and privet very well, and the reviewer liked the handle position and the balance that the forward-mounted battery gives.
The criticisms are about the details. The orange blade scabbard feels cheap (though you will not lose it). The battery takes 75 minutes to charge, longer than rivals. And the rear trigger lock is too easy to press without meaning to. It also notes that Bosch’s much dearer AdvancedHedgeCut 36V-65-28 ran for longer, and prints a vibration figure of “15 m/s²”, which is almost certainly a typo: every retailer listing gives 2.0 and 1.6 m/s². Its verdict: there are lighter, cheaper and more powerful hedge trimmers, but the reviewer has not used one that “combines such a package of talents”. At the time it quoted £159 for the bare tool and £259 for the kit, well above what dealers charge now.
Watch: STIHL HSA 50 Cordless Hedge Trimmer
An overview of the HSA 50 itself. We confirmed the link and title in two separate searches but could not open YouTube, so we cannot say who made it or which market’s version it shows.
Watch on YouTube ↗Arbtalk
This is a short thread, and it was written before the HSA 50 became Stihl’s only AK trimmer, so take it as context rather than a verdict. Its value is the question everyone answers first: “what batteries do you have?” The poster already owned Stihl batteries and a charger, and the advice followed the battery. AK owners were pointed at the AK trimmers. AP owners were pointed at the professional HSA 100, which one contributor said lasts “for ages on a charge”.
One contributor owned three Stihl trimmers. He used an HSA 60 on an AK 20 for topiary because it is small and light, and the HSA 100 for general hedge work. He also said both had needed a motor replacement under warranty. That is one person and two machines, not a failure rate. But it is the only long-term ownership report we found, and it is a good reason to buy where you can claim the warranty easily. Nobody in the thread mentions the HSA 50 by experience.
Watch: STIHL HSA50 Unboxing and 1st use.
An owner’s unboxing and first cut, which is the nearest thing on video to the ownership view the forum gives. Confirmed by two search listings, not opened.
Watch on YouTube ↗Screwfix
Seventeen ratings at most, and we cannot tell whether some appear on both pages. Every one is five stars, which is a nice result but not a sample. These ratings say buyers were happy at the start. They say nothing about how the trimmer lasts.
Screwfix is more useful for the facts on its pages, and for what it shows about buying Stihl. Stihl used to sell only through approved dealers. Since July 2024 Screwfix has stocked its battery and electric tools in its stores and online, so the HSA 50 is now on the high street. The listings confirm the bare tool comes with no battery, charger or case, and the kit comes with a 72 Wh AK 10. They also give 15 mm cutting capacity, 30 mm tooth spacing, 2.9 kg and 2 m/s² vibration. The catch is price. On 7 October Screwfix wanted £142.99 for the bare tool and £224.99 for the kit. Stihl’s own price is £124 for the tool, and one dealer is selling the kit for £165. A Stihl dealer will usually assemble the trimmer and show you how to use it; Service Dealer reported Screwfix offering a Stihl handover service at its Yeovil store only.
Watch: HSA 50 Battery Powered Hedge Trimmer
A short walk-round of the HSA 50. Confirmed by two search listings, not opened; we cannot tell whose it is or which market’s version it shows.
Watch on YouTube ↗Strengths and weak points
What holds up
- Clean cutting through laurel, holly and privet in the one hands-on test.
- Run time beats the claim: 56 minutes measured with no load against Stihl’s 50.
- 15–16 mm cutting capacity, against the 10 mm quoted for Bosch’s EasyHedgeCut.
- Balanced, with the battery mounted forward, and low vibration at 2.0 and 1.6 m/s² on the retailer figures.
- A screw-on tip protector for working against walls and fences.
- The AK battery fits Stihl’s AK mower, blower, strimmer and MSA 70 chainsaw.
What to be wary of
- Around 3.7 kg with an AK 10 on our sum, which you feel at the end of your arms.
- The flimsy scabbard, the 75-minute charge and a trigger lock that is easy to knock (Expert Reviews).
- Only a 2-year guarantee, with no registration extension. Bosch gives 3 years if you register.
- Stihl’s UK page has no weight, noise, tooth spacing or cutting capacity, so those figures come from retailers, and they disagree.
- Screwfix charges more than Stihl’s own price.
- Seventeen buyer ratings at most. Nobody has long-term reliability data.
Who it actually suits
Buy it if you already own an AK battery, or plan to build on one. At £119–£124 for the bare tool, adding it to batteries you already own is good value. It also suits you if your hedge has holly, laurel or woody growth that a light DIY trimmer chews rather than cuts. Buy from a dealer, at or below Stihl’s £124 tool price or around £165–£179 for the kit, and you get the setup and a local place to claim the warranty.
Choose the Bosch instead if your hedge is privet, box or conifer cut twice a summer, you want the lightest machine you can find, or you already own Bosch 18V Power for All batteries. The Bosch EasyHedgeCut 18V-52-13 gives you a 52 cm blade at 2.4 kg for about £71–£80 bare. It is about half a kilo lighter as a bare tool, and its warranty is a year longer if you register it. What you give up is cutting capacity (10 mm against 15–16 mm), a measured run time, and any editorial test.
Look higher up the range if you trim for hours or for a living. The Arbtalk professionals go to the HSA 100 on AP batteries, which costs £339 before you buy a battery.
What we could not check
- Stihl’s own weight, noise, vibration, tooth spacing and cutting capacity. Stihl’s UK product page, read on 7 October 2026, gave only voltage, 0.22 kW, the battery and the 50-minute run time. Every other figure in our table comes from retailers or Expert Reviews, and we have shown where they disagree.
- The weight with a battery. Screwfix’s kit page says 2.9 kg “with battery”; its bare-tool page and two dealers say 2.9 kg without. Our 3.7 kg is a sum, not a weighed figure.
- The AK 10’s capacity. 72 Wh / 2.0 Ah from retailers, 2.5 Ah from Expert Reviews. Stihl may have updated the pack, but we could not confirm it.
- That the HSA 50 officially replaces the HSA 56. The HSA 56 has gone from Stihl’s UK range and the HSA 50 is the only AK hedge trimmer left, but we found no Stihl statement calling it the replacement.
- Run time while cutting. Both the 50-minute claim and the 56-minute test are blade-running figures. Nobody has timed it on a real hedge.
- Reliability. At most 17 buyer ratings, and one forum owner reporting motor replacements on two different Stihl trimmers. That is not enough to judge on.
- The Expert Reviews vibration figure of 15 m/s², which we believe is a misprint; we could not ask.
- The three videos. YouTube would not open for us, so each video was confirmed by its link and title appearing in two different searches, not by watching it. No channels are named because none of the listings named one.
- Gardeners’ World on the older HSA 56 (4.8/5, 3.7 kg, 45 cm) is a test of the predecessor, not this trimmer, and we have not used it as evidence for the HSA 50.
- Sites that blocked us: Which? (its HSA 50 link redirected to a general buying guide), Stihl’s old m.stihl.co.uk HSA 56 page (would not resolve). We did not try Amazon.
Sources and prices last checked 7 October 2026. Stihl renames and reprices its AK range often. Check the model, the battery in the box and the dealer’s price before you order.