What are the signs of a weak or failing car battery?

I noticed this recently with my car. The first sign was slow engine start: it took longer than usual. Then the headlights started dimming slightly, especially at night. Another thing was needing multiple attempts to start the car. Sometimes, electrical components like power windows also felt weaker. Initially, I ignored it, but eventually, the battery died completely. So these small signs actually matter. If you notice them early, you can replace the battery before getting stuck somewhere unexpectedly. It’s better to act early than wait for a complete failure.