Husqvarna Automower Solar Hybrid Technical Manual page 21

1. FUNCTION
1.14.1 Battery check
If the mower's battery starts to deteriorate the
Automower will mow for shorter periods. The mower
can also stop and display the fault message Low
battery voltage (Does not apply to 210 C). A battery
check is recommended in order to establish whether
the battery is spent (For 210 C it is sufficient to run the
mower as usual).
It is also recommended to make a battery check with
the winter service of the mower. A spent battery can
then be changed before the next season starts.
In order to check the capacity of the battery it is
necessary for the battery to be fully discharged. Use
manual operating mode and charge the battery fully.
When charging starts the battery temperature should
not be more than 40 ºC (104 ºF). Now let the
Automower mow in manual operating mode until the
battery is fully discharged. It is also possible to switch
the mower from automatic to manual operating mode
when it has left the charging station and started to
mow. The mower ought to have a slight mowing
resistance during the ongoing battery check. The
cutting height should therefore be adjusted to the
maximum cutting height.
If the mower has not been in operation for several
weeks when the check is made, for example if the
mower has been left for its winter service, at least two
or preferably three battery checks ought to be made.
The assessment should be based on that last made
check as the first check can indicate an incorrect
value. The four most recent battery tests are saved in
the mower. Read the tests from Autocheck, operating
history, or Battery history (shortcut 5-1-5) in the
mower. For 210 C and 230 ACX, which have two
batteries, the capacity is shown for each battery.
Accordingly, it is possible to determine whether one or
both batteries should be replaced. On Solar Hybrid the
energy that the solar panel has supplied during manual
operating time is also shown.
A new battery has a battery capacity of about
2200 mAh (3000 mAh for 210 C). As the battery ages
the battery capacity decreases. If the displayed battery
capacity is about 1500 mAh or lower it is probable that
the battery is spent and needs to be replaced. Note
that the values are approximate and vary from mower
to mower and presume that the measurement is made
in accordance with the description.
Due to the measurement differences on the control box,
the capacity is always given slightly higher for battery A
than for battery B. The difference can be up to 400 mAh
without anything unusual occurring in the control box or
in the batteries.
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