I've noticed that my about 3 weeks old MacBook Air's battery is draining much faster than expected.

I've noticed that my MacBook Air's battery is draining much faster than expected. After charging it to 100%, the battery level drops significantly even when the MacBook is not in use. It's not lasting anywhere near the advertised 18 hours of battery life."

- "For example, after charging it fully, I’ve seen the battery percentage drop by 10-20% in just a short time without doing anything on the laptop. I’ve tried closing all apps and reducing brightness, but the issue persists."

- "This is affecting my ability to use the MacBook throughout the day without needing to recharge it constantly. I was under the impression that it should last much longer, especially when not in use."

- "Could you please check if there’s an issue with the battery or if something else might be causing this rapid drain?"