BATTERY QUESTION

Well, let's see. February 7 was almost 6 months ago, and Battery Health normally declines at a rate of about 1% a month, so you could expect the battery to be at about 94-95% by now. 97% is really good performance.

That 1% number is an average. Some months the Battery Health will not decline at all, then it might decline 2% the next month.

All that you really need to be concerned about is replacing the battery when it's down to 80%.

Yes. 3% reduction of overall battery capacity over 4 months is within normal operating parameters.

It should be completely fine. While I bought my new iPhone I received it at 80% and everything works perfectly