Replace battery for Automower G3(320, 330X, 420, 430X, 440, 450X)

In this guide we will show you step-by-step how to change the battery of your Automower G3.

How often do I have to change my battery?
Normally a genuine Husqvarna battery will last for 5-6 seasons. This also depends on how big your lawn is and how many hours per day that your Automower has to cut. An indication of when the battery needs to be changed is when your Automower returns to the charging base more frequently or when it suddenly stops in the middle of the lawn with an error message 'Empty battery'.

On the bottom of this page you will find the correct OEM spare parts that we use for this replacement.

Required tools: Torx screwdriver T20.

Step 1: Turn your Automower upside-down and disconnect the charging contacts.	Step 2: Remove the chassis. You do this by pulling the chassis upwards with one hand while keeping the Automower in place with your other hand.
Step 3: Unscrew all of the Torx screws as the image above shows. A total of 14pcs.	Step 4: Lift off the upper part of the body and disconnect the white flat-cable that is connected to the motherboard.
Step 5: Disconnect the battery from the mainboard(Yellow-Black-Red wires)	Step 6: Unscrew the 5 torx-screws which holds the battery holder. Also lift up the four white cable holders by pulling them upwards.
Step 7: Carefully remove the battery holder and battery.	Step 8: Take out your new battery and battery holder. install the battery in the holder and connect the cable.
Step 9: Install the new battery holder in your Automower. Tighten it with the four torx screws and attach the cables in the holders as marked in the image.	Step 10: Connect the battery to the mainboard. Also remember to put a new sealing strip to the lower chassis.
Step 11: Connect the white flat-cable from the upper body to the motherboard.	Step 12: Tighten all 14 Torx screws around the upper body.
Step 13: Re-install the chassis and finally connect the charging contacts.

No programming is required after a battery replacement.