Don’t know is an answer
Missing battery health must lower confidence. A precise-looking result from a figure you did not give is a guess wearing a suit.
TechWorth editorial · Last reviewed 6 September 2026
The questionnaire stores "I don't know" instead of leaving a field blank. Blank would become a silent default; a stored unknown becomes a confidence penalty.
Apple’s batteries page is why we know what "degraded" means for an iPhone: a published retention figure at the design cycle life. We still will not fill in eighty-something percent for you.