I know that some people charge the car battery every day. I charge the battery every week if I often ride my pickup truck. Also, I never discharge the battery more than 50%. It really helps me keep my car battery in good condition. In this article https://truckpowerup.com/how-to-char...ith-a-charger/ , you can find many useful tips on how to choose, charge and care for a car battery. Perhaps your battery has deteriorated because you didn't take it home in the winter or it was at high temperature for a long time. It also negatively affects your battery.