Is there any evidence that this really matters on top of the protections and limits that are already built in and obscured from the user? There's such a cult around this feature, but I'm not convinced.
What I don't understand is do any of the OEMs giving this feature also combine it with passthrough power? So besides not charging the phone at 80%, it would keep it working using the wire instead of the battery.
Fair question. I'd assume that the buffer which the BMS/low level firmware reserves is relatively marginal. Having too high a margin at that (low) level would take away a lot of capacity and might make people mad
This is untrue. Overcharge protection is for preventing catastrophic events like the cell catching fire. You can easily verify this by measuring the voltage at full charge.
Is this different than Charging Control? I'm on 7 Pro CalyxOS and have been using that since I was on 4 XL [a couple years ago]. I figured it was AOSP...
Honestly, if I have the option to keep it toggled on/off I'm fine with it, but I also don't see it in my latest update which came in last night. But not too concerned yet (Pixel 8a) so it's still pretty new I guess. :)