You think it drained rapidly. You don't know, because you know neither how much battery you had at the beginning of the day nor how much battery you had at the end of the day. You know what your battery meter said you had, but you cannot be certain of its accuracy. I'm not saying that it's not draining fast, but there's no way you can know until you've calibrated your battery so you can actually see how fast it's draining. If you've never calibrated your battery, your battery meter very likely will not tell you that. It's the first step in troubleshooting any battery drainage issue.
I apologize if I responded angrily, but I was angry. I know what I'm talking about, and I found it offensive to be told that what I was saying made no sense. In the future, you might try "I don't understand" instead of blaming your lack of understanding on those who are trying to help you.