Same, Ever since I installed Ios 14 on my iphone 6s, I noticed my battery was draining quicker than ever. I ignored it cuz I thought it’s natural or is the battery on my phone is the problem, I went to a repair shop and they said that my battery is in good condition. It was really odd. But I finally realised that before I installed Ios 14 my battery can live up to 10 hours. But now, even when I open Safari, the battery decreases 5% every minute.