How can the Audi A2's battery be properly maintained for optimal performance?

I recently noticed that my Audi A2's battery has been struggling to hold a charge, even with moderate usage. I want to make sure I am properly maintaining the battery to extend its lifespan and ensure it performs at its best. Can someone provide some tips or recommendations for maintaining the battery in an Audi A2?

Regularly check and clean the battery terminals with a mixture of water and baking soda to remove any corrosive buildup, and ensure a strong electrical connection. Also, keep an eye on the battery's fluid levels and top up with distilled water if necessary.

Avoid leaving the Audi A2 parked for extended periods of time, as this can cause the battery to drain faster due to the vehicle's electronic components still using a small amount of power. If possible, use a trickle charger or disconnect the battery when not in use.