What do Red Bars in iPhone charging history mean?
My iPhone was charged up to about 75% when I went to bed. I put the phone on a wireless charging speaker (first time ever). I woke up and the phone was charged but the charging history showed red bars. A day later, it showed that same time frame as yellow bars. What is this indicating?
[Re-Titled by Moderator]
iPhone 15 Pro Max, iOS 18