80% is low for the battery. There is a catch with battery replacement - if replacement is done not by apple be sure to check settings app - it could display a message that the battery is not original and show a red circle on its icon. That would not go off.
SignalRevenue
joined 2 years ago
Absolutely fine as long as it is on your hand which is +36. Even taking it off for 3 hours and keeping at -8 does not make any noticeable difference.