Key Features:
- Charges all the STIHL AK and AP Batteries
- Fast charge time
- Charging level indicator
- Turns off automatically
Home Delivery - $8 on all online orders. Delivery timeframe is 2 to 5 working days.
Click & Collect - FREE. Includes assembly of tools prior to collection. The store will contact you when your order is ready.
We will happily accept returns or exchanges up to 14 days after the date of purchase, provided the products are in their original condition and packaging. Click here to view our full Returns Policy
All STIHL tools purchased online are covered by the same comprehensive warranty as those bought in‑store, giving you complete peace of mind no matter how you shop.
Battery-Powered Tools, Batteries and Chargers
Petrol‑Powered Tools (exluding WaterBlasters and Lawnmowers)
Accessories & Cutting Attachments
Click here to find out more about the STIHL Warranty, including timeframes for, Hire and Government use.
The STIHL FSA 400 Battery Clearing Saw is built for professionals in garden maintenance, council operations, and forestry who need a powerful, cordless tool for demanding tasks. Whether you're tackling tall grass, dense undergrowth and scrub, or small trees, this clearing saw delivers high performance with ergonomic comfort.
Efficient and Ergonomic: With a 520 mm mowing circle and powerful EC motor, the FSA 400 ensures fast work progress. The anti-vibration system and ergonomic control handle reduce fatigue. You can set the speed to three levels for optimal efficiency and energy-saving mode is indicated by an LED.
Durable and Reliable: Built to last, the FSA 400 features a robust housing, steel drive shaft, and aluminum protective tube. The air filter with metal grille ensures optimal engine cooling and easy cleaning. The gearbox with grease filler screw adds to its longevity.
Splashproof and Ready for Any Weather
Designed for regular professional use, even in adverse conditions. Certified splashproof with IPX4 protection class for reliable performance.
Compatable with a range of cutting tools: In addition to the STIHL AutoCut 46-2 supplied as standard, you can also use the STIHL FSA 400 battery clearing saw with metal cutting tools: BrushCut 300-3 brush knife and the ShredCut 270-2 shredder blade or the Carbine Tipped 22-36 , and the matching guards. The STIHL PolyCut 48-2 mowing head with plastic blades is particularly suitable for energy-efficient grass mowing.
Tools from the STIHL ALLPRO system can be operated with both ALLPRO batteries and AP batteries.
Run time with AP 20 Lithium-ion Battery: not recommended
Run time with AP 30 Lithium-ion Battery: not recommended
Run time with AP 100 P Laminate Cell Battery: not recommended
Run time with AP 200 P Laminate Cell Battery: not recommended
Run time with AP 300 P Laminate Cell Battery: 20 - 40 mins (recommended)
Run time with AP 200 Lithium-ion Battery: not recommended
Run time with AP 300 S Lithium-ion Battery: 16 - 29 mins
Run time with AP 500 S Lithium-ion Battery: 20 - 40 mins
Run times quoted are based on ideal operating conditions. Times will vary depending on load and conditions.
Rated Voltage (V)
36
Max Voltage (V)
40
Power (kW)
2
Weight (kg)
7.1
Length no cutting tool (cm)
179
Standard Cutting Head
Standard Mowing Line Diameter (mm)
Handle Type
Bike
Blade can be fitted
Yes
Clearing Saw Vegetation
Small trees or vegetation like mature gorse
Cutting circle diameter (cm)
52
Recommended Charger
AL 301
Charge Time AP 300 P Battery/ AL 301 Charger
90 minutes, or to charge it up to 80%, it takes 60 minutes
Power Source
Battery
STIHL Battery System
AP/ALL PRO Battery Range
Battery Compatibility
Run time with AP 20 Lithium-ion Battery: not recommended
Run time with AP 30 Lithium-ion Battery: not recommended
Run time with AP 100 P Laminate Cell Battery: not recommended
Run time with AP 200 P Laminate Cell Battery: not recommended
Run time with AP 300 P Laminate Cell Battery: 20 - 40 mins (recommended)
Run time with AP 200 Lithium-ion Battery: not recommended
Run time with AP 300 S Lithium-ion Battery: 16 - 29 mins
Run time with AP 500 S Lithium-ion Battery: 20 - 40 mins
Recommended Battery
AP 300 P
What's in the Box?
FSA 400 Brushcutter Tool, ADVANCE universal Harness, Safety Glasses, AutoCut 46-2 Cutting Head, enough line to get you started.
Warranty
5 Years Domestic. 3 Years Professional (Includes Battery & Charger)


Sturdy bike handlebar with anit-vibration, strap suspension bar and easy-to-fold handlebar clamping screw.










Q: What size garden will it maintain?
A: The FSA 400 is the ideal Brushcutter for professional applications in garden maintenance, council operations, and forestry.
Q: What type of cutting attachment does this Brush Cutter come with?
A: The FSA 400 comes with an AutoCut 46-2 mowing head, for which you can buy replacement line. This Brush Cutter can also take a blade.
Q: Does the performance of the Battery reduce as it depletes?
A: No, there is no gradual drop in performance – the battery runs at full power until it is fully depleted.
Q: Are the batteries Interchangeable?
A: All tools in the STIHL ALLPRO / AP Battery System use the same battery platform, allowing you to interchange batteries between compatible tools. However, for the FSA 400, we recommend using the highest-capacity batteries, such as the AP 300 P, to ensure you get the maximum power and performance the tool is designed to deliver. Smaller batteries may operate the tool, but they won't provide the same cutting performance or runtime.
Q: What is the difference between the FSA 400 and the FSA 200?
A: The FSA 400 is STIHL's most powerful battery brushcutter, designed for demanding professional work such as clearing dense vegetation, scrub, and small trees. It offers more power and productivity than the FSA 200 for the toughest jobs.
Q: Can the FSA 400 cut gorse, blackberry, and woody scrub?
A: Yes. When fitted with an appropriate metal blade, the FSA 400 is designed for clearing tough vegetation, dense scrub, and small trees, making it suitable for managing gorse, blackberry, and similar growth.
Q: Does the FSA 400 include a harness?
A: Yes. The FSA 400 comes supplied with a STIHL ADVANCE Universal Harness for improved comfort and support during long periods of use.
Q: Does it require regular maintenance?
A: Very little. Unlike petrol brushcutters, there are no spark plugs, fuel filters or engine servicing requirements. Simply keep the cutting attachment in good condition and the tool clean for reliable operation. The protected air filter is designed to support long service life.
Q: What is a STIHL laminate cell battery?
A: STIHL laminate cell batteries are the latest generation of STIHL lithium-ion battery technology, designed to provide more power, longer runtime and reduced weight for professional users.
Q: How is a laminate cell battery different from a standard lithium-ion battery?
A: Both use lithium-ion technology, but STIHL laminate cell batteries pack more energy into a lighter battery. That means more power and longer runtime without unnecessary weight, making your tool easier to handle during longer jobs. Laminate batteries can also minimises downtime, with the high-speed charging function, you can reach up to 80% battery power in just 9 minutes (with specific charger only).
Q: What is the Warranty?
A: The FSA 400 comes with a 5-year domestic warranty or 3 year professional warranty and ongoing support from your local STIHL SHOP.
Q: Can I buy it with a battery and charger?
A: This version is supplied as a tool only, with the battery and charger sold separately. If you would prefer a complete kit, we also offer an FSA 400 Kit that includes a compatible battery and charger.