You'd probably need to get a random sample of a few hundred phones of the same type to get a reliable view of how well the charging limit actually works. It's v

You'd probably need to get a random sample of a few hundred phones of the same type to get a reliable view of how well the charging limit actually works. It's very likely that the battery health indicator people are seeing on their phones is primarily dictated by how good a battery they got when they initially bought their phones. AFAIK, these batteries have a tolerance range of around ±5%, so if you just have a sample of two phones, one might end up with 100% battery health after a few hundred cycles and the other with battery health in the low 90s due to no factor other than battery lottery.