0458-806-8621-B
20
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11 LED Diagnostics
11.1 LEDs on the Battery
11.1.1 Battery Status
Four LEDs show the status of the battery. These LEDs can 
glow or flash green or red.
11.1.2 Trimmer Status
When the battery is inserted in the trimmer, the same LEDs 
on the battery will indicate the status of the trimmer.
If three LEDs glow red continuously: the trimmer motor is too 
hot. Allow the motor to cool down.
If three LEDs flash red when you activate the trigger switch: 
the trimmer has an electrical malfunction. Do not operate the 
trimmer. Have it checked by an authorized STIHL servicing 
dealer before use or storage.
For troubleshooting information, @ 23.1.
11.1.3 Charge Status
The LEDs on the battery also show the battery's state of 
charge.
To determine the battery's state of charge:
► Press the button (1) on the battery.
The LEDs on the battery will glow or flash green for about 
5 seconds and indicate the state of charge (see 
illustration).
For example:
If four green LEDs glow continuously: full charge.
If one green LED is flashing: less than 20 % charge.
11.2 LED on the Charger
One LED shows the status of the charger. The LED can glow 
green or flash red.
11 LED Diagnostics
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 4 LEDs flash red: the battery has a 
malfunction and must be replaced. Do not 
attempt to charge, use or store the battery.
If the LED glows green continuously: the battery 
is being charged.
or
The battery is too hot or too cold for charging. To 
determine, check the LEDs on the battery. If 
there is one glowing red light, 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).
1
0000-GXX-0629-A0
20-40%
40-60%
60-80%
80-100%
0-20%