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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.
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.
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.
20
To determine the battery's state of charge:
1
► 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.
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).
11 LED Diagnostics
80-100%
60-80%
40-60%
20-40%
0-20%
0458-806-8621-B