How to properly maintain the battery in a BMW X3?

I've noticed that my BMW X3's battery life seems to be decreasing. What steps should I take to ensure I am properly maintaining my car's battery?

Regularly check the battery's voltage and perform a load test every six months. This will help determine if the battery needs to be replaced.

Make sure to never fully discharge the battery and try to keep it above a 75% charge. This will extend the battery's lifespan.

Be mindful of how often you are using power-consuming features such as heated seats or the stereo system. These can drain the battery quickly if used frequently.