How To Bring Back 100 Battery Health Iphone. However the display has to be thoroughly checked for a final assumption but a bare-eye evaluation can at least provide some information. Battery Health of the iPhone is calculated through the battery cycle and maintenance of battery.
It usually is not possible to restore 100 health because lithium-ion battery health starts degrading the minute they come off the assembly line and will degrade even if sitting unused on a shelf. However The Maximum Capacity Readout gives an estimate of the total capacity the battery will carry. The lower the capacity the closer your battery to the end of its life.
Your usage and environmental factors will play a role in how quickly the capacity diminishes.
Essentially what its telling you is that when your battery says its at 100 its only at 96 and its displaying battery percentage based on true capacity. Open the Settings menu then go to Battery then Battery Health. Depending upon the length of time between when the iPhone was made and when it is activated your battery capacity may show as slightly less than 100. My MBP is at 98 health after 101 cycles in about 6 months.
