My iPhone's battery has been discharging like crazy after I updated to iOS 13.2.2. Without any active usage of the phone the entire battery discharges in about 4 - 5 hours, due to apps' background activity. I'm having to charge the phone 2 - 3 times a day.

According to https://www.forbes.com/sites/gordonkelly/2019/11/19/apple-io..., the battery discharge issue has apparently not been fixed, so I'm not planning to update my phone yet. Hopefully it gets fixed in the next iOS release.