10 LED Diagnostics and Acoustic Signals
To charge an AP battery:
2
1
► Push the battery (2) into the charger (3) until it stops.
The LED on the charger glows green when the battery is
charging.
The LEDs (1) on the battery glow green and show the
state of charge.
When the LEDs on the battery go out, the charging
process is complete and the charger will shut itself off.
► Remove the battery from the charger and disconnect the
charger's power supply cord from the electrical outlet.
► Charge STIHL AP series batteries only with genuine
STIHL AL 101, AL 300 or AL 500 series chargers.
10 LED Diagnostics and Acoustic Signals
10.1 STIHL AR Backpack Battery
10.1.1 Battery Status
Six LEDs and an acoustic signal indicate the status of the
battery.
0458-725-8621-B
3
4
1
2
3
1 A short beep
The acoustic signal works as it should.
2 Four long beeps
The battery's charge is low. Recharge the battery.
3 Rapid succession of short beeps
There is a malfunction in the battery. The signal stops
automatically after a few seconds. Do not attempt to
charge, use or store the battery. Replace the battery.
These LEDs can glow or flash green or red.
If one LED glows red continuously: the battery is
either too hot or too cold. Allow the battery to
warm up or cool down gradually at an ambient
temperature of about 50 °F to 68 °F (10 °C to
20 °C).
If the four right side LEDs flash red and a rapid
succession of several short beeps is emitted: the
battery has a malfunction and must be replaced.
Do not attempt to charge, use or store the
battery.
► Be aware that your ability to hear the acoustic signal may
be reduced when wearing hearing protection.
10.1.2 Power Tool Status
When the battery is connected to the power tool, the same
LEDs on the battery will indicate the status of the power tool.
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