Okay, so you know how your computer works, right? Well, every computer has a little battery inside of it called a CMOS battery.
This battery helps your computer remember things like the date and time, as well as your computer's settings, even if you turn it off. It's like a little helper that never sleeps, always keeping track of important information for your computer.
Without the CMOS battery, your computer would forget important information and might not work correctly. It's like forgetting to turn off the lights before bedtime - it can be a big problem later on.
So, you see, the CMOS battery is a tiny but important part of your computer that helps keep everything running smoothly, even when you turn it off.