It seems that some iOS 14 users are suffering from battery issues. iPhones that were previously behaving themselves are now discharging at a much faster rate.
So, is it an app, a problem with your battery, or an iOS 14 bug?
Well, you can use the tools built into iOS 14 to determine this for yourself.
Must read: iOS 14.0.1: The battery and connectivity woes continue
Simply put, you are looking for one of four things.
I suggest rebooting your phone before keeping an eye on the battery, and getting into the habit of charging it at the same time every day.
You're going to need to become very familiar with the Battery screen in Settings.
I have gone through these tools in detail in the gallery above. Click here to get a walkthrough of the settings you need to familiarize yourself with.
I also suggest taking screenshots so you can refer back to previous days. This can be very handy once you start making changes and want to know if they work!