HVAC fan, headlights dimming...
 

Hi all, Noob here, had an issue come up recently

I have a 2011 mazda 3 sedan auto, 38k miles, no mods. Recently I noticed when I shift from reverse to drive, or park to drive, or drive to reverse the fan slows down and the headlights dim momentarily. Could this be related to the battery? Is it dying already? Any thoughts or ideas appreciated