Hi Robin bro, hope you’re doing good!
“Even though my iPhone is almost 2 years old and still shows 90% battery health with normal performance, why is the battery draining so fast nowadays? Could it be due to heavy daily usage, background apps, 5G connectivity, increased screen time, heating issues, or the 450 charging cycles reducing the battery’s efficiency over time?”
I am good bro. thank you. hoping you too. its possible to see such fast battery drain due to heavy usage. also current 5G is another main reason and network coverage is not good in most cities. if the signal coverage is 2 or 3 point then its possible due to network search we see fast battery drain while using the device. even during standby it consumes battery for network search.
Till networks improve their coverage in many cities we just have to follow the charging practice. charge the device when it reaches 20% and that will help to maintain the health overtime.