Chosen Solution

i have two iphone 7’s. same model and memory capacity. i noticed one was draining it’s battery faster than the other, so i ran some comparisons. i made sure each phone was running one app and the background settings are the same. i know i should have probably timed them but didn’t because i didn’t have time to really monitor them. what i can say is that when the first phone hits the 20% warning, the other phone was always between 40% and 45%. the only differences that i can point to are…..

  1. the 20% phone is running IOS 15.2, the 40%+ phone is running IOS 14.8.1.
  2. both batteries are original and are close to 85% health
  3. the 20% phone battery has 774 charge cycles, the 40%+ phone has 380 charge cycles so my questions are, can 15.2 or a higher charge cycle count be responsible for a faster battery discharge? or is there some place else where should be looking? thanks

@beekerc there are many variable that can cause this. Yes, the charge cycles will make a difference as well as the iOS version. I would suggest that if you are not satisfied with the battery life on phone number 1, change the battery. Testing battery life against the other phone is just a pretty rough estimate. If you do want to test the batteries, run a test like I did on here. It tests the battery with the same load etc. Evaluating High Capacity Batteries (Part II) iPhone 7 Battery Replacement