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12 LED Diagnostics
To charge the battery:
► Push the battery (2) into the charger (3) until it stops.
The LED on the charger (4) glows green when the battery
is being charged.
The LEDs (1) on the battery glow green and show the
state of charge.
When the LEDs on the battery turn off, the charging
process is complete and the charger will shut itself off.
► Remove the battery from the charger and disconnect the
power supply cord from the wall outlet when charging is
complete.
A factory-new battery is not fully charged. STIHL
recommends that you fully charge the battery before using it
for the first time.
Operate the charger only indoors, in dry rooms and within an
ambient temperature range of 41 °F to 104 °F (5 °C to
40 °C).
The battery heats up during operation of the blower. If a hot
battery is inserted into the charger, it may be necessary for
it to cool down before charging. The charging process
begins only after the battery has cooled down sufficiently.
Charging time depends on a number of factors, including
battery condition and the ambient temperature. For a
complete list of approximate charging times, see
www.stihl.com/charging-times.
12.1 LEDs on the Battery
12.1.1 Battery Status
Four LEDs show the status of the battery. These LEDs can
glow or flash green or red.
12.1.2 Blower Status
When the battery is inserted in the blower, the same LEDs
on the battery will indicate the status of the blower.
If three LEDs glow red continuously: the blower motor is too
hot. Allow the motor to cool down.
If three LEDs flash red when you activate the trigger switch:
the blower has an electrical malfunction. Do not operate the
blower. Have it checked by an authorized STIHL servicing
dealer before use.
For more information, @ 23.
12.1.3 Charge Status
The LEDs on the battery also show the battery's state of
charge.
12 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 or use the battery.
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