Wireless charging while iPhone X is powered off?

IdrisSeabright wrote:

I've never heard this one before. However, I did have a housemate who insisted that if you boiled water for tea in a kettle, the tea stayed hotter longer than if you boiled the water in a microwave.

Or the one about putting boiling water in an ice cube tray because it will freeze faster? Or adding cream to your coffee will keep it hot longer?

As a very young kid (around 6 or so) I firmly believed that adding a little salt to soup cooled it off.

All of these are equivalent to the idea that electricity from different sources differs in quality.

Lawrence Finch wrote:

IdrisSeabright wrote:

I've never heard this one before. However, I did have a housemate who insisted that if you boiled water for tea in a kettle, the tea stayed hotter longer than if you boiled the water in a microwave.

Or the one about putting boiling water in an ice cube tray because it will freeze faster?

My mother told me that was so that the ice cubes would freeze clear instead of cloudy.

IdrisSeabright wrote:

My mother told me that was so that the ice cubes would freeze clear instead of cloudy.

That probably is true, because boiling drives out the dissolved gases. But it also makes for flat-tasting water when they melt.

Lawrence Finch wrote:

All of these are equivalent to the idea that electricity from different sources differs in quality.

There are bad quality sources of electricity. A lot of portable generators come with instructions not to use with sensitive electronics. The output from some inverters are pretty bad.

Yes, but that that's a different issue, and it's why you should only use Apple or Apple-certified power sources. The claim under discussion is that a phone that is charged to 100% when powered down has a better quality of charge when turned back on that one that was charged to 100% while powered on.

100% is 100%. And if you use a battery analyzer it will not see any difference.

At one time iOS displayed the actual state of charge. So after the phone reached 100% and stopped charging the display might drop a point or two. At 97% it would resume and bring it back to 100%. Apparently a lot of users complained about this. With iOS 10 the displayed SoC will stay at 100% as long as the cable is connected. So, in that sense, yes, it might only be at 97% when you unplug it. Most of the time it won't be however, because this cycling only takes a few minutes. And the difference between 100% and 97% is probably less than the error in the accuracy of the display once you get much below 97%. The older approach was a case of greater precision than accuracy.

If you really care, the Battery Life app will display the actual value that you can watch. And with an experiment I did last week. When the battery shows 100% and you unlock the phone the current into the phone from the power source jumps immediately to 1 amp (then settles back to whatever the actual demand is), showing that the cable is powering the phone rather than the battery.

Lawrence Finch wrote:

If you really care, the Battery Life app will display the actual value that you can watch. And with an experiment I did last week. When the battery shows 100% and you unlock the phone the current into the phone from the power source jumps immediately to 1 amp (then settles back to whatever the actual demand is), showing that the cable is powering the phone rather than the battery.

I've seen it in coconutBattery. At first I thought it was inaccurate until someone posted that it's more accurate than what's displayed on the screen. Not much different than some older digital fuel tank readings where a full tank would quickly drop from 21 to 20 gallons, so it was recalibrated to reduce customer complaints.

There's no real reason to turn off your phone when charging. It will only make a few minute's difference in charging time.

I have the same issue. I can’t have my phone on at work but i also can’t charge it on my wireless charger now. This is a dumb feat

Well i need to have mine powered off at work to charge it while working so there are reasons

If it's powered off why do you need to charge it?