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11 Charging the Battery
► Mount an approved STIHL KombiTool as described in its 
instruction manual.
► Put on and adjust the STIHL AR backpack battery, STIHL 
Battery Belt or STIHL Battery Backpack, @ 14.
► Adjust the loop handle, @ 13.2.
► Check the controls for proper function and condition, 
@ 17.1.
11.1 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.
The charger runs a self-test immediately after it is plugged 
in. The charger LED (1) will glow green for about 1 second, 
then it will glow red briefly before going out. Once the LED 
goes out, the self-test is complete and the charger is ready 
to charge the battery.
► Position the power supply cord (2) so that it will not be 
stepped on, tripped over, come in contact with sharp 
objects or moving parts or otherwise present a tripping 
hazard or be subjected to damage or stress.
11.2 Charging
WARNING
STIHL batteries contain safety features and devices which, 
if damaged, may allow the battery to generate heat, rupture, 
leak, ignite or explode. Never charge a malfunctioning, 
damaged, cracked, leaking or deformed battery or use a 
charger that has been damaged. Never insert a wet battery 
or battery adapter. Never use a wet charger. Follow all 
product-specific warnings and instructions accompanying 
your battery and charger.
A battery is not fully charged when it ships from the factory. 
STIHL recommends that you fully charge the battery before 
using it the first time.
11 Charging the Battery
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