Just my opinion but I would not let them take my phone apart for 1%. I am not sure if they would.
Typically I wouldn’t care but I just think this is a defective battery . 27 or so days of ownership loss of 10+ mah . Using that info and taking it a year would mean I would lose around 500 mah which would be 20% before a year old. And around half by 2 years old.