Apple’s latest iOS update for battery

From last year, Apple company was facing iPhone Slowing down issue due to older batteries. After previous iOS 10.2.1 update (released in January 2017), the company cannot defend against accusations about older iPhones that being slowed down. But after iOS 10.2.1 update the company has also submit their official apology and promised to user for better update.
Now company has released an update, but this is not the finalized update and may contain bugs, which could just be a nuisance or potentially cause data loss. Currently this update of iOS 11.3, the battery health indicator will let users toggle throttling on or off if they wish, though the company stands by its reasoning that slowing down performance might actually be beneficial for aging phones. Apple’s spokesperson Cynthia Hogan said :

“With the update, iOS dynamically manages the maximum performance of some system components when needed to prevent a shutdown. While these changes may go unnoticed, in some cases users may experience longer launch times for apps and other reductions in performance”.

To test out iOS 11.3, tapping through Setting > Battery > Battery Health (Beta).
Inside of this menu you’ll find: “Maximum Capacity” and “Peak Performance Capability.” That depends on you. Newer devices are expected to exhibit 100% capacity, which should decrease not more than 80%.