Chosen Solution
Why does my iPhone 6s (2 years old) drop from 100% to around 97% immediately after turning the device on? It has been doing this for about a year now and I have yet to find a solution, also I have checked the battery health and it is at 87% wear level, so it is well within it’s limits and does not need replacing yet. Thank you in advance for your help!
Battey health is not always an indication that the battey is ok Often needing to check the battery itself and seeing if there is cell damage can varifie whether it looks damaged or not. I would still try with a new battery considering its 2 years old this way eliminating the basic solution.
It does that because it takes energy to boot IOS on your phone.
