iphone SE3 loses charge after fully charging to 100% and on the charger

Are you suggesting that an old Apple 5w. cube that charges the phone just fine is somehow discharging the phone when the phone is not being used and is 100% charged?

Where do you get your information? Seems unlikely to me.

If the hotspot and 5G was on, it makes sense that it could draw more than a 5W cube charger will supply.

I tried it with a 2.1 amp charger, and it didn't do the discharge thing last night.

But that's the thing - some nights it works fine, and then it will do this weird discharging thing for no apparent reason.

Did you get that it is discharging when the hotspot is OFF, and almost nothing is running, except I suppose email checking and other background stuff. That's why I included the screen shots - look at the first one. Nothing is going on and the battery is going down starting right around midnight, and I went to sleep about 10 pm.

Other suggestions?

Well, did it again last night on a 30 watt charger with the hotspot off.

Anyone have any ideas?

Can the "optimized battery charging" setting do this?

If my phone has "intelligently decided" it should charge my phone during the daytime instead of at night, could that be doing it?

Why does it do it some nights and not others?

I THINK (not sure, but I think that may be accurate) the times it does the discharge-on-the-charger thing it are when the phone is on the charger at night and the phone is alread

y at greater than 80% charged.

Then why doesn't it keep the charge at 80%? It goes lower than that until I unplug the charger and plug it back in.

WEIRD!!!!!

I did contact Apple Support, and they confirmed it was pretty weird and no normal operation.

AppVPN or a slightly corrumpt OS download might e the problem. I'll let you know when we can isolate the cause.