Battery - Husqvarna Automower Technical Manual

1. Function

1.12 Battery

The main battery is of the NiMH type and has a rated
°C
V, A
capacity of 2.2Ah. The available capacity drops with a
rising ambient air temperature. The mower adapts
itself to this and returns to the charging station earlier.
Voltage
Battery charging is normally monitored by the control Temperature
box via a temperature sensor in the battery. The
temperature of the battery rises during the entire
Current
charging process. When the battery is fully charged
the temperature rises faster and charging is stopped.
Charging is also stopped should the battery
temperature rise above 53 ºC. Automower then
Minutes
leaves the charging station and starts mowing.
3012-619
If the control box is blocked, for example, by
The battery's charging cycle
unintentionally interrupting programming, battery
charging is not monitored. It is then important that you
charge the Automower with caution, that is to say, for
no more than 10 minutes. A blocked control box is
characterised by no text being shown on the display
and the keypad does not work despite the battery
being charged.
1.12.1 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. A battery check is recommended in
order to establish whether the battery is spent.
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. 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 checks are saved in the
mower under Battery history (shortcut 5-1-5).
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