The Battery Cap Conundrum: When Good Intentions Go Awry Reports have been circulating about iPhones mysteriously refusing to charge past 80%.
At first glance, this seems like a minor quirk, but it's actually a symptom of a more complex issue. iOS has a built in feature designed to protect the battery's long term health by limiting its capacity.
This feature is not new; in 2018, several smartphone manufacturers implemented software updates that capped battery charging at 80% or below.