0458-806-8621-B
33
English 
24 Specifications
24.1 STIHL FSA 57
Intended for household use.
– Approved battery type: STIHL AK series
– Weight without deflector and cutting attachment: 
5.7 lbs. (2.6 kg)
– Length: 59 in. (1490 mm)
24.2 STIHL AK Series Battery
Approved charger type: STIHL AL 101,  AL 300 or AL 500 
series.
– Battery technology: Lithium-Ion
– Voltage: 36 V
– Rated capacity in Ah
1
: See rating plate
– Stored energy in Wh
2
: See rating plate
– Weight in kg: See rating plate
– Permissible ambient temperature range during use or 
storage: 14 °F to 122 °F (- 10 °C to 50 °C)
For a complete list of approximate charging times, see 
www.stihl.com/charging-times.
For a complete list of approximate battery runtimes, see 
www.stihl.com/battery-life.
24.3 STIHL AL 101
– Mains voltage: 120 V
– Rated current: 1.3 A
– Frequency: 60 Hz
– Charging current: 1.5 A
– Rated power: 75 W
– Insulation: Class II (Double Insulation)
– Permissible ambient temperature range during charging: 
41 °F to 104 °F (5 °C to 40 °C)
24.4 Symbols on the Trimmer, Battery and Charger
24 Specifications
1
Rated capacity calculated pursuant to IEC 61960. Usable energy
available to the operator will be less.
2
The battery is marked with its stored energy as provided by the cell
manufacturer. Usable energy available to the operator will be less.
Symbol Explanation
VVolt
Hz Hertz
A Ampere
Ah Ampere hour
WWatt
Wh Watt hour
AC Alternating current
IP20 Degree of electrical protection
Push and hold the retaining latch in this direction 
to unlock.
Push and hold the drive tube release button to allow 
length adjustment.
Rated speed of the cutting attachment
Direct current
Number of cells and stored energy according to cell 
manufacturer's specification. Usable energy will be 
less.
Certification/listing mark of CSA.
STIHL products must not be disposed of in the 
household trash, but only in accordance with local, 
state and federal laws and regulations and as 
provided in this manual, @ 27.