Posted before about this, different issue but same outcome.
Girlfriend’s phone is only charging to 80% at night. We thought it was the “optimize battery” setting, so we disabled it. Intermittently since then, she’s been having problems. Now three days in a row.
With “optimize battery” off, charging via Qi through an Otterbox case, it starts charging just fine (after being relatively low - 20-30% maybe?) but only gets to 80%. The phone (per the 24 hour graph) maxed out (at 80%) around midnight to 1 AM, and she woke up around 4:30 AM.
Apple says they shut down charging if the battery is overheating, but they also say they resume charging once the heat has dissipated. I don’t know how 3.5 hours wouldn’t be enough for it to cool enough to charge some more. And honestly, I don’t have any reason to suspect battery overheating.
Are there any bugs with iPhone Qi charging? Anything obvious that I’m missing?