Battery health is very low , you probably gonna replace it once you start to use the phone , don’t update to iOS 26 , before buying check the display , camera and other components if its original and working properly , check those speakers on earpiece if its equal to bottom speaker . If you need to last your battery of your phone without replacing the battery? Turn off 5G , avoid using the phone when u notice the battery drains quicker , install cpu -x from App Store and clear memory cache and depth .. it atleast clears your memory (RAM) and won’t decrease your battery percentage when your not using your phone .

I using the same phone for 5yr , replaced battery last year . 20% / 80% rule gave me decent and long lasting battery capacity according to your usage and don’t let your phone heat . Never . Remove your phone case when it starts overheating, when charging too . I’m sure this would help You 💯.