English
Fault
LEDs on the
battery
the battery into
the charger.
The grass has
not been cut
cleanly or the
lawn is yellow.
19.2
Troubleshooting Charger
If the battery is not being charged and the LED
on the charger flashes red: There is no contact
between the charger and battery.
► Remove the battery.
► Clean contacts on charger.
► Fit the battery.
► If the battery is still not being charged and the
LED on the charger flashes red: Do not use
the charger and contact your STIHL servicing
dealer.
Malfunction in charger.
20 Specifications
20.1
Lawn Mower STIHL
RMA 239.1 C
– Permissible battery: STIHL AK
– Weight with grass catcher box and without
battery: 15 kg
– Weight (m) with grass catcher box and
STIHL battery AK 30: 16 kg
– Maximum grass catcher box capacity: 40 l
– cutting width: 37 cm
– Speed (n): 3350 rpm
– Electrical type of protection: IPX1
For information on the battery life, see
www.stihl.com/battery-life for charging times.
20.2
Blade
– Minimum thickness a: 1.6 mm
48
Cause
The blade is blunt or
worn.
The resistance at the
blade is too great.
– Maximum grinding limit b: 5 mm
– Sharpening angle c: 30°
20.3
– Battery technology: lithium-ion
– Voltage: 36 V
– Capacity in Ah: see rating label
– Energy content in Wh: see rating label
– Weight in kg: See rating label
20.4
– Rated voltage: See rating plate
– Frequency: see rating plate
– Rated power: see rating plate
– Charging current: See rating plate
For charging times, see www.stihl.com/charging-
times.
20.5
If an extension cord is used, the cross sectional
area of its conductors must meet the following
minimum requirements – depending on the line
voltage and length of the extension cord:
If rated voltage on the rating label is 220V to
240V:
– Cord length up to 20 m: AWG 15 / 1.5 mm²
– Cord length 20 m up to 50 m: AWG 13 /
2.5 mm²
If rated voltage on the rating label is 100V to
127V:
– Cord length up to 10 m: AWG 14 / 2.0 mm²
– Cord length 10 m up to 30 m: AWG 12 /
3.5 mm²
Remedy
► Sharpen and balance the blade.
► Set a higher cutting height.
► Mow shorter grass.
STIHL AK Battery
STIHL AL 101 Charger
Extension Cords
20 Specifications
0478-131-9830-B