How often should I replace the battery on my Audi A2?

I recently purchased an Audi A2 and was wondering how often I should replace the battery. I've heard that leaving the car unused for too long can drain the battery, so I want to make sure I'm replacing it at the right time.

It is recommended to replace the battery on your Audi A2 every 3-4 years. However, this can vary depending on the type of battery you have and your driving habits.

If you notice your car is struggling to start or your headlights seem dimmer than usual, it may be time to replace the battery sooner.