FSA 45 Cordless Grass Trimmer

Handy cordless grass trimmer with PolyCut 2-2 cutting head and integrated battery

Part of the AI Line, STIHL's easy-to-use cordless grass trimmer is perfect for straightforward trimming and clearing work in outdoor areas at home. Integrated battery with charge level indicator, shaft and loop handle offering tool-free adjustment, adjustable mowing unit working angle (useful for vertical edge trimming among other tasks), easy to switch between PolyCut blades and mowing lines without changing the mowing head, spacer bracket. Battery charging time: 145 min/210 min (80%/100%). Approximate working time up to 20 minutes.

Versions Price
FSA 45 £109.00*
  • Technical data
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    Technical data Value
    Cordless technology AI Line
    Sound pressure level dB(A) 1) 80
    Standard cutting tool PolyCut 2-2
    Sound power level dB(A) 1) 94
    Rated voltage V 18
    Weight kg 2) 2.3
    Vibration value, right, with line head m/s2 3) 4.9
    Vibration value, left, with line head m/s2 3) 1.7
    Total length cm 4) 110
    Cutting diameter mm 250
    Battery life time with PolyCut 2-2 min 5) up to 20
    Battery life time with mowing head min 5) up to 12
    Recommended battery Integrated

    1) K-Wert nach RL 2006/42/EG = 2,0 dB(A)
    2) Including battery
    3) K-factor according to DIR 2006/42/EC = 2m / s ²
    4) Without cutting attachment
    5) Battery life times are approximate and may vary depending on application

  • Features
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    Standard features

    • Telescopic shaft

      With 8 adjustable positions along a length of 170 mm, the FSA can be optimised to match the user's size, ensuring ergonomic working and a less tiring job – and without the need for a separate tool.

    • Adjustable loop handle

      The loop handle can be adjusted in 6 increments up to an angle of 120°.

    • Adjustable mowing head

      The mowing head can be tilted in 4 increments up to an angle of 48°.

    • Vertical edge trimming

      The mowing head can pivot through 90° for precise lawn edge trimming.

    • Charge level indicator

      The remaining working or charging time can be viewed at any time by pressing the button. Four LEDs light up, or flash green or red, to indicate the charging state or problems.

    • Storing spare blades

      The PolyCut blades can be easily replaced if worn. Up to five spare blades can be conveniently stored on the tool.

    • Spacer bracket

      The FSA 45 has a spacer bracket for precise and efficient trimming around plants and other objects. It can be folded out or down as required.

    • Activation key

      The tool can only be used with the activation key. If the key is removed, the tool switches off to guard against unintentional activation. The tool can be safely stored and transported.

    • Charger cable

      The STIHL HSA 45 draws its power from an integrated 18V lithium-ion battery. The battery is easily charged using the charger cable.

    • Compact and ergonomic

      The integrated battery cells mean that the tool is optimally balanced. The FSA is easy to handle. Its streamlined design creates plenty of room for manoeuvre.

    • Quiet technology

      The STIHL cordless tools are so quiet you don't even need to wear ear protection.

    • Loop handle

      The loop handle is ideal for working in confined spaces, eg tidying between shrubs and bushes.

  • Accessories
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    • STIHL Smart Connector

      STIHL Connected is a cloud based system that enables professional users to digitally manage machine fleets and work assignments.

      This is managed by the STIHL Smart Connector - a sensor with a diameter of just under 5cm, which is mounted on the tool. It can be mounted on petrol, electric or battery-powered tools where it records and saves the operating hours while the motor is running and transmits this information via Bluetooth® 4.2 to the STIHL connected App (the smart connector can be mounted on non-STIHL tools too). The Smart Connector offers entirely new functions and services, as a basis for device management both in your home garden using the STIHL connected App, and for managing your machine fleet using the STIHL connected Portal. The STIHL connected Portal gives you a detailed overview of the status of your fleet of tools, as well as information such as duration of use on a particular work assignment.

      You can view power tool availability, analyse machine usage; plan and manage work tasks with associated resources; and analyse machine data, which you can then use to optimise your daily work processes. The Smart Connector also provides information about upcoming tool maintenance and, if needed, the system can arrange a workshop appointment directly with a STIHL Approved Dealer. Service-related tool data can also be shared with the dealer with your permission, so they can plan the servicing work in advance and order any necessary spare parts. This can shorten service times so the tool is quickly ready for use again.

      STIHL Connected is an intuitive way to manage your machine fleet and workload intelligently and efficiently. Visit: STIHL connected FAQs to find out more.

      Download the app for free or visit the STIHL connected Portal by clicking on the following links:

      Dimensions (l x b x h) mm 53 x 42 x 14
      Signal range m Approx. 10
      Running time per battery charge Year Approx. 1
      Connectivity Bluetooth low energy 4.2
      Battery 3V CR 2,032

      Versions Price
      Smart Connector £20.60* Save and compare
      Save and compare
    • Set of plastic blades for PolyCut 2-2, 3-2

      Replacement plastic blades for PolyCut 2-2 and 3-2 mowing head, set of 8 plastic blades.

      Versions Price
      Orange PolyCut replacement blades (8) £2.60* Save and compare
      Save and compare
    • PolyCut 2-2 mowing head

      Universal cutting tool for trimming and working on large areas. With two or three mobile plastic blades.


      PolyCut 2-2 – for FSA 45

      Versions Price
      PolyCut 2-2 £21.90* Save and compare
      Save and compare
    • PolyCut 3-2 mowing head

      Mowing head with 2 plastic knives. Best suited for cutting max. medium-height grass in the home garden and for the care of lawn edges. The knife can be changed quickly and without tools. The mowing head can optionally also be filled with thread pieces with a diameter of 1.6 mm.


      PolyCut 3-2 – for FSA 45 / FSA 57

      Versions Price
      PolyCut 3-2 £25.00* Save and compare
      Save and compare
    • Round mowing line (rolls)

      This high performance mowing line can be used universally and is available in many different diameters for all STIHL line mowing heads. Suitable for all trimming and mowing jobs and specially developed against fraying and fusing.

      STIHL professional tip - leave your new mowing line in water for 24 hours before use. This will increase the flexibility and lifespan of the mowing line.

      Versions Price
      Roll Ø 1.4 diameter (mm) x 16.0 roll length (m) - grey £4.50* Save and compare
      Save and compare
    • Round mowing line (rolls)

      This high performance mowing line can be used universally and is available in many different diameters for all STIHL line mowing heads. Suitable for all trimming and mowing jobs and specially developed against fraying and fusing.

      STIHL professional tip - leave your new mowing line in water for 24 hours before use. This will increase the flexibility and lifespan of the mowing line.

      Versions Price
      Roll Ø 1.6 diameter (mm) x 19.0 roll length (m) - blue £4.75* Save and compare
      Save and compare
    • Round and quiet mowing line (rolls)

      The spiral grooves of the low noise mowing lines considerably reduce wind noise. This mowing line is ideally suited for use with electric and cordless brushcutters due to the reduced noise level.

      STIHL professional tip - leave your new mowing line in water for 24 hours before use. This will increase the flexibility and lifespan of the mowing line.

      Versions Price
      Roll Ȼ 1.6 diameter (mm) x 19.0 roll length (m) - blue £5.30* Save and compare
      Save and compare
    • STANDARD Glasses - Clear

      EN 166, also suitable for spectacle-wearers, material with 100 % UV protection, side protection.

      UV-Protection % 100
      Weight g 40.3

      Versions Price
      STANDARD Glasses - Clear £6.20* Save and compare
      Save and compare
    • FUNCTION SensoTouch

      FUNCTION SensoGrip gloves, knitted with nitrile dipping to provide excellent handling. Good breathable properties. Allows the user to operate smartphones or tablets without needing to remove the gloves.

      Cut protection class No protection

      Versions Price
      FUNCTION SensoTouch M, 9 £4.65* Save and compare
      Save and compare
    • FUNCTION SensoTouch

      FUNCTION SensoGrip gloves, knitted with nitrile dipping to provide excellent handling. Good breathable properties. Allows the user to operate smartphones or tablets without needing to remove the gloves.

      Cut protection class No protection

      Versions Price
      FUNCTION SensoTouch L, 10 £4.65* Save and compare
      Save and compare
    • FUNCTION SensoTouch

      FUNCTION SensoGrip gloves, knitted with nitrile dipping to provide excellent handling. Good breathable properties. Allows the user to operate smartphones or tablets without needing to remove the gloves.

      Cut protection class No protection

      Versions Price
      FUNCTION SensoTouch XL, 11 £4.65* Save and compare
      Save and compare
  • Documents
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    Owners manuals

* Manufacturer's recommended retail price updated as of July 2021. The manufacturer's recommended retail prices are subject to change without notice.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.