0458-812-8621-A
15
English 
9 Before Starting Work
■ Do not expose a battery or the blower to fire or excessive 
temperature. Exposure to fire or temperatures above 
212 °F (100 °C) may cause fire and explosion.
■ Follow all charging instructions and do not charge the 
battery outside of the ambient temperature range 
specified. Charging improperly or outside the specified 
range may damage the battery and increase the risk of 
fire.
■ Have servicing performed by a qualified repair person 
using only identical replacement parts.
■ Do not modify or attempt to repair the blower or the battery 
pack. Follow the instructions for use and care.
9.1 Preparing the Blower for Operation
Before starting work: 
► Fully charge the battery, @ 10.
► Adjust the nozzle, @ 13.1.
► Put on and adjust the STIHL AR backpack battery, STIHL 
Battery Belt or STIHL Battery Backpack, @ 12.
► Check the controls for proper function and condition, 
@ 16.1.
10.1 Setting up the Charger
WARNING
Read and follow the safety precautions on the battery and 
charger and all warnings and instructions that accompany 
those products. To reduce the risk of short circuit, which 
could lead to electric shock, fire and explosion, make sure 
the charger and its components are dry and not damaged; 
operate the charger indoors at an appropriate ambient 
temperature.
WARNING
A typical household electric circuit is between 15 and 20 
amps. A single STIHL AL 500 charger draws approximately 
4.8 amps. A single AL 300 charger draws approximately 
4.4 amps. To reduce the risk of fire from overloading an 
electrical circuit:
► Ensure the electrical system is rated to withstand the 
expected electrical draw before charging your battery.
► Charge multiple batteries one at a time or on separate 
circuits, unless you know your circuit can handle the total 
expected draw from multiple chargers.
WARNING
Since the charger heats up during the charging process, do 
not operate the charger on a combustible surface or in a 
location where combustible gases, liquids, vapors, dusts or 
other materials and substances are present.
To set up the charger:
► Insert the plug (3) into a properly installed electrical 
outlet (4) matching the voltage and electrical frequency 
stated on the rating plate on the charger.
9 Before Starting Work
10 Charging the Battery
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