10 LED Diagnostics
use only. Keep the charger dry. Protect it from rain, water,
liquids and damp conditions. Never insert a wet battery.
Never use a wet charger, @ 6.
To charge the battery:
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► Push the battery (2) into the charger (3) until it stops.
The LED on the charger (4) glows green when the battery
is charging.
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. The
battery can be removed from the charger.
► Disconnect the power supply cord from the electrical
outlet when the charger is not in use.
A battery is not fully charged when it ships from the factory.
STIHL recommends that you fully charge the battery before
using it 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 lawn mower. If
a hot battery is inserted into the charger, it may be
necessary for it to cool down before charging starts. The
charging process begins only after the battery has cooled
down sufficiently.
0458-818-8621-A
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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.
10 LED Diagnostics
10.1 LEDs on the Battery
10.1.1 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.
10.1.2 Lawn Mower Status
When the battery is inserted in the lawn mower, the same
LEDs on the battery will indicate the status of the lawn
mower.
If three LEDs glow red continuously: the lawn mower motor
is too hot. Allow the motor to cool down.
If three LEDs flash red when you activate the trigger switch:
the lawn mower has an electrical malfunction. Do not
operate the lawn mower. Have it checked by an authorized
STIHL servicing dealer before use or storage.
For troubleshooting information, @ 24.
10.1.3 Charge Status
The LEDs on the battery also show the battery's state of
charge.
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