My iPhone X battery health came down to 90% with in 7 months of time what would be the reason & should I opt for battery replacement because I see some lag
![a) R-int model of the studied battery pack. (b) Battery health model:... | Download Scientific Diagram a) R-int model of the studied battery pack. (b) Battery health model:... | Download Scientific Diagram](https://www.researchgate.net/profile/Yang-Zhou-76/publication/346647394/figure/fig3/AS:967127221665793@1607592506690/a-R-int-model-of-the-studied-battery-pack-b-Battery-health-model-Blue-curve-is-the.png)
a) R-int model of the studied battery pack. (b) Battery health model:... | Download Scientific Diagram
![Apple Releases macOS Catalina 10.15.5 With Battery Health Management Feature, Other Improvements [Download] - iClarified Apple Releases macOS Catalina 10.15.5 With Battery Health Management Feature, Other Improvements [Download] - iClarified](https://www.iclarified.com/images/news/76002/371466/371466-640.jpg)