0458-725-8621-B
26
English 
10 LED Diagnostics and Acoustic Signals
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.
10.1.3 Charge Status
The LEDs and acoustic signals on the battery also indicate 
the battery's state of charge.
To determine the battery's state of charge:
► Press the button(1) on the backpack battery.
A single short beep will be emitted. The LEDs on the battery 
will glow or flash green for about 5seconds and indicate the 
state of charge (see illustration). 
For example:
If six green LEDs glow continuously: full charge.
If one green LED is flashing and four long beeps are emitted: 
less than 20% charge.
10.2 STIHL AP Battery
10.2.1 Battery Status
Four LEDs show the status of the battery. These LEDs can 
glow or flash green or red.
10.2.2 Power Tool Status
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.
10.2.3 Charge Status
The LEDs on the battery also show the battery's state of 
charge.
To determine the battery's state of charge:
0000-GXX-2673-A0
100 % 0 %
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 all 4LEDs flash red: the battery has a 
malfunction and must be replaced. Do not 
attempt to charge, use or store the battery.
1
0000-GXX-1248-A0
20-40%
40-60%
60-80%
80-100%
0-20%