FSA 45 Cordless Grass Trimmer
FSA 45 Cordless Grass Trimmer
FSA 45 Cordless Grass Trimmer
FSA 45 Cordless Grass Trimmer

FSA 45 Cordless Grass Trimmer

AI LINE ICON Integrated Battery
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The FSA 45 grass trimmer / brush cutter is perfect for trimming lawn edges in smaller gardens. It is lightweight, quiet and simple to use, with a built-in Lithium-Ion battery that you plug in and charge, like you would charge a phone.

The LED charge level indicator on the side of the tool shows you how much battery life is left at the touch of a button. The loop handle helps you to guide the trimmer exactly where you need it and is easily adjusted without the need for tools. The shaft is also extendable, whilst the mowing head can be turned on its side, which is particularly useful for vertical edge trimming.

The FSA 45 comes with plastic Polycut blades, which are really quick and easy replace, without having to use any tools. They are extremely efficient and give a precise finish to the lawn. Pre-cut mowing line can also be fitted to the head but it is not included with the FSA 45 and will need to be bought separately. 

  • Run time: Up to 20 minutes
  • Charging time: 100% in 210 minutes, 80% in 145 minutes


Quiet technology Quiet technology

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

Adjustable length shaftAdjustable length shaft

Adjustable by up to 170mm, the shaft length can be easily adapted to suit your height or the job in hand.

Adjustable mowing headAdjustable mowing head

This versatile mowing head can be adjusted to four different angles, up to 48 degress, to suit all mowing tasks around the garden.

Vertical edge trimmingVertical edge trimming

The rotating head can be simply adjusted through 90 degrees to change the tool from a grass trimmer into a edger, so you can accurately trim around borders, flower beds and pathways.

Adjustable loop handleAdjustable loop handle

So that you can work in the most comfortable position for you, the loop handle can be adjusted to 6 different settings, up to an angle of 120 degrees.

Charge level indicatorCharge level indicator

So you know how much charge you have left on the battery, the charge level can be viewed at any time with the four LEDs on the side of the trimmer.

Spare blade storageSpare blade storage

The FSA 45 uses PolyCut blades, which can be easily replaced if worn. Up to five spare blades can be conveniently stored on the tool so they are always at hand when you need them.

Spacer bracketSpacer bracket

The metal spacer bracket means you can trim precisely around trees, plants and other objects. It can also be folded up if not needed.

Activation toolActivation tool

The tool can only be used with the activation key. If the key is removed, the tool switches off to prevent it being started accidentally. The FSA 45 can then be safely stored and transported.

Charger cableCharger cable

The built-in battery in the STIHL FSA 45 is easily charged using the charger cable.


QWhat type of cutting attachment does this use?

A: The FSA 45 uses a PolyCut 2-2 mowing head. The PolyCut blades are extremely efficient and give a precise finish to the lawn. Pre-cut mowing line can also be fitted to the head - it is not included, but can be bought at your local STIHL dealer.

QHow long does the battery last?

A: The battery will last up to 20 minutes or mow up to 250m of lawn edges. This does depend on what is being cut and how the tool is being used.

QHow long does it take to charge?

A: To fully charge the battery it takes 210 minutes, or to charge it up to 80%, it takes 145 minutes.

QWhat size garden will it maintain?

A: The FSA 45 is perfect for smaller gardens.

QWhat battery does it use?

A: The tool is powered by an 18V Lithium-Ion battery.

QAre the batteries interchangeable?

A: The batteries are integrated into the tool, so they are not interchangeable.

QAre the PolyCut blades easy to change?

A: The blades can be easily changed by simply locking them in position. No tools are needed.


#1Cleaning your FSA 45

When you have finished using the trimmer, remove the activation key and clean using a damp cloth or soft brush.

#2Storing your FSA 45

We recommend that you store your FSA 45 grass trimmer with around 40%-60% charge (2 green LEDs), ideally within a temperature range of 0 to 50 degrees centigrade. Store your FSA 45 in a clean and dry area and keep out of the reach of children at all times.

#3PolyCut blades

To get the most of the PolyCut blades, place them in a bucket of water for 12-24 hours before using them. This helps to make them more flexible and less likely to break.

#4Check for wildlife

Don’t forget to check your work area for wildlife before starting to use your tool. In particular, you should check for nesting birds before trimming hedges, as well as checking for other small animals such as hedgehogs before trimming long grass.

Technical Specifications

Sound pressure level dB(A) 1) 80
Sound power level dB(A) 1) 94
Weight kg 2) 2.3
Vibration value, right m/s2 3) 4.9
Vibration value, left m/s2 3) 1.7
Total length cm 4) 110
Standard cutting tool PolyCut 2-2
Battery life time with PolyCut 2-2 min 5) up to 20
Battery life time with mowing head min 5) up to 12
Protection class III / III

1) K-factor according to DIR 2006/42/EG = 2.0 dB(A)
2) Including battery
3) K-factor according to DIR 2006/42/EC = 2m/s²
4) Without cutting attachment
5) Battery life times are approximate and may vary depending on application

STIHL Factory


Andreas Stihl founds an engineering office in Stuttgart and develops his own chainsaw.

STIHL Logo 1928


STIHL becomes a brand. The name represents the ceaseless quest of the engineer and company founder Andreas Stihl to ease the heavy labour of forestry work with his inventions.

STIHL Chainsaw 1930


STIHL presents his portable petrol-powered chainsaw at the Leipzig trade fair – it is well received and orders flow in from across Europe.

Learn more about the history of STIHL

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