Battery inquiry about iphone

[kitnoman]

So I have an iphone 11 pro and it's around 1yr and a half. For over the 1st year, the battery health have been 100%, but in recent months, it started declining and currently at 92%. I know that it's still good. I'm just curious if some of you guys are also experiencing this.  I used the phone from the time I bought it exactly the same way.  Could this be another OS issue?

[bmx6454]

that's actually really good imo, my iPhone 12 is at 91% less than a year in.

[kitnoman]

It is, but it just weird to me that for one year, it did not degrade and stayed with 100%, then in just 5months or less, went down to 92%. It's like either it was not reporting the correct battery health on the 1st year. Or something happened to my phone within the last few months that I was not aware of.

[Donut417]

2 hours ago, kitnoman said:

It is, but it just weird to me that for one year, it did not degrade and stayed with 100%, then in just 5months or less, went down to 92%. It's like either it was not reporting the correct battery health on the 1st year. Or something happened to my phone within the last few months that I was not aware of.

My phone is 2.5 years old and is at 91%. I have the XR btw. 

[kitnoman]

6 hours ago, XG BC said:

did you use it in the cold more? did you use a faster charger than before? if so that might explain it.

as for usage, I did not change anything on how I used it. the only difference from the 1st yr and now are probably, application installed and version of ios. As for charging, I actually used fast charging and wireless charging on the 1st few months and later used an older slower charger, since I started working from home anyway and don't need to rush. For almost a month now after noticing, I turned on the optimized battery charging, and hasn't drop since, so kind of working but still curious what change.