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FSA 57 Battery Trimmer
FSA 57 Battery Trimmer
FSA 57 Battery Trimmer

FSA 57 Battery Trimmer

AK SYSTEM ICON Interchangeable Battery | View Range
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The FSA 57 battery-powered trimmer is the ideal tool for keeping your lawn edges in check for medium to large yards.

It is lightweight, quiet and easy to maneuver around your property, with an adjustable loop handle that helps you guide the trimmer exactly where you need it. The shaft is extendable, so you can adjust it to suit your height.

  • Runtime on recommended AK 10 battery: Up to 25 minutes
  • Runtime on AK 20 battery: Up to 45 minutes
  • Runtime on AK 30 battery: Up to 65 minutes


Length-adjustable shaft

Quiet technology

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

Length-adjustable shaft Adjustable length shaft

The length of the shaft on the FSA 57 can be easily adjusted at the touch of a button to suit you whatever your height.

Loop handle Adjustable loop handle

So that you can work in the most comfortable position, the loop handle can be easily adjusted without tools.

Spacer bracket Spacer bracket

The metal spacer bracket means you can trim precisely around trees, plants and other objects without damaging them. It can also be folded up if not needed.

Safe battery locking position

There are two positions for the battery - in the first neutral position, the battery is secured in the trimmer but not connected to the contacts, so you can carry the battery around easily without the risk of the trimmer starting accidentally. Once you push the battery in fully, you can easily start the tool.

Charge level indicator on the battery 

Charge level indicator on the battery

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

Easy to extend the mowing line

The FSA 57 uses the Autocut® 3-2 which you can tap on the ground to automatically feed out the mowing line if it has broken off. You can also fit the PolyCut 3-2 head to the    FSA 57, which uses STIHL PolyCut™ blades instead of mowing line. 

AL 101 chargerAL 101 charger

Charger for the STIHL AK System. With operating mode indicator (LED) and cable tie with Velcro tape. The charger can be wall mounted if required.


Question: Is this trimmer suitable for trimming through heavy weeds or scrub?

A: No, the AutoCut® mowing head on the FSA 57 is suitable for trimming grass and light weeds, along lawn edges or in small areas of lawn. If you need to cut thicker, woody material, a brushcutter with a grass cutting blade or brush knife may be more suitable. You can find out more information about the different cutting attachments we have available at Please visit your nearest STIHL Dealer, who will be able to give you expert advice and talk you through our full range of brushcutters and cutting tools.

Question: What type of cutting attachment does the FSA 57 use?

A: The FSA 57 uses an AutoCut® 3-2 mowing head. An optional PolyCutTM 3-2 head is available for the FSA 57 from your nearest STIHL Dealer. This head uses durable STIHL PolyCutTM mowing blades. 

Question: How long does the battery last?


A: The AK 10 battery will last up to 25 minutes or mow up to 500 m of lawn edges, depending on the type of grass that is being cut and how the tool is being used.

Question: How long does it take to charge?

A: To fully charge the battery it takes 80 minutes with an AL101 charger or to charge it up to 80%, it takes 55 minutes.

Question: What size of property will it maintain?

A: The FSA 57 is the ideal grass trimmer for small to large city properties.

Question: What battery does it use?

A: The FSA 57 is equipped with an AK 10 battery. However, the AK 20 and AK 30 can be purchased separately.

Question: Are the batteries interchangeable?

A: Yes, all of the tools in the AK System use the same style of battery. There are three different batteries in the range, which all have different capacities. For the FSA 57, we recommend the smaller capacity AK 10 battery as it is lighter and means the tool is perfectly balanced, but you can use the AK 20 and AK 30 battery for longer runtimes.


#1 Cleaning your FSA 57

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

#2 Storing your FSA 57

Store your FSA 57 in a clean and dry area and keep out of the reach of children at all times.

#3 Make the most of your trimmer line

To get the most of your trimmer line, simply pop it in a bucket of water for 12-24 hours before using it to make it more flexible and less likely to break.

Technical data

Runtime with AK 10 battery MIN  up to 25
Runtime with AK 20 battery MIN  up to 45
Runtime with AK 30 battery MIN  up to 65
Weight KG / LB 2.6 / 5.7 
Sound pressure level DB(A) 72
Vibration value, left M/S²  4
Vibration value, right M/S²  4
Cutting tool AutoCut® 3-2
Total length IN / CM  59 / 149
Protection class III / III

STIHL - Quality tools since 1926

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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