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11 LED Diagnostics and Acoustic Signals
► 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 AP 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. The
AP battery can be removed from the charger.
► Disconnect the power supply cord from the electrical
outlet when the charger is not in use.
► Charge STIHL AP series batteries only with genuine
STIHL AL 101, AL 300 or AL 500 series chargers.
11.1 STIHL AR Backpack Battery
11.1.1 Battery Status
Six LEDs and an acoustic signal indicate the status of the
battery.
1 A short beep
The acoustic signal works as it should.
2 Four or six (AR L) 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.
► Be aware that your ability to hear the acoustic signal may
be reduced when wearing hearing protection.
11.1.2 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.
If three LEDs glow red continuously: the power tool motor is
too hot. Allow the motor to cool down.
If three LEDs flash red when you activate the trigger switch:
the power tool has an electrical malfunction. Do not operate
the power tool. Have it checked by an authorized STIHL
servicing dealer before use or storage.
For troubleshooting information, @ 23.
11.1.3 Charge Status
The LEDs and acoustic signals on the battery also indicate
the battery's state of charge.
11 LED Diagnostics and Acoustic Signals
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2
3
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0000-GXX-3229-A1
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.
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