I'm trying to understand what habits might be hurting my battery without me realizing it. I have a 2018 Ford Fusion and during my lunch breaks at work, I like to sit in my car with the engine off but I listen to the radio for about 20 or 30 minutes while I eat. Sometimes I also charge my phone through the USB port. The car is parked in direct sunlight because there's no shade in my office parking lot. A coworker saw me doing this yesterday and told me that I'm killing my battery, especially in the summer heat. He said that using electronics with the engine off drains the battery, and the extreme heat makes the battery weaker and more vulnerable to damage from deep discharges. Is he right? I always thought that 20 or 30 minutes of radio wouldn't use that much power, and my car is a 2018 so it has a modern battery. But after doing some research on tips to avoid battery failure in summer, I learned that heat already puts a lot of stress on batteries, and adding any extra drain might push a weak battery over the edge. I've noticed that on days when I listen to the radio for a while, my car cranks just a tiny bit slower when I start it to go back to work. Am I imagining that or is it real? How much power does the radio and USB port actually use? Could 30 minutes of radio really drain a healthy battery enough to cause damage? What about using the power windows or the interior lights with the engine off? I want to be comfortable during my breaks but I also don't want to be stranded with a dead battery or have to replace my battery more often. Should I stop using any electronics with the engine off completely during summer, or am I overthinking a small thing? Please give me honest advice based on real knowledge, not just guessing visite here https://nolcardcheck.ae/why-battery-keeps-dying-summer-sharjah. I'm willing to change my habits if it will make a real difference in battery life. What do you do in your own car?