Two days ago I became an iPhone user. I bought an iPhone 8 and I was so excited. I installed the 14.4.2 update while I was setting up my iPhone. After the update was complete my battery was around 85%. I began to notice the horrible battery drain after forty three minutes of using the iPhone. It went from 83% to 43% after I played some games for that amount of time. I feel like that big issue is from the new update.