If this is more than a once-a-year occurrence, maybe your concern should be focused on your unreliable power situation, and not on your phone.
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Apple Says MagSafe Charger Limited to 12W for iPhone 12 Mini
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The article says:
If your phone stops charging due to a powercut, the charger will (likely) be unable to verify it is safe to deliver maximum power. Then, likely rather than proved, it could restart charging at some extremely low but universally safe power level. Which might well result in only partly charged phones - for example, if the powercut occurs shortly after falling asleep and you do not notice until the morning. Maybe it has spent the time charging at a meagre two watts or something.
Personally? It is rare. For friends in the area, it is a frequent occurrence. A short interruption - not hours of powercut. But it might only take a few seconds of interruption to cause dropping to some arbitrary safe charging rate.
The price you pay for living in the sticks.
I worked at a company developing power converters for power delivery incl wireless, in our labs we achieved 75% efficiency, that was 3 years ago.Please cite a real-world test that demonstrates 80% efficiency for wireless phone charging.
I'll get the ball rolling:
Wireless charging has an efficiency issue
On paper, wireless charging has its benefits. Being able to simply plop your phone down on a mat to recharge eliminates the potential for wear and tear...www.techspot.com
I will be looking at the data sheets of some of the manufacturers what they list, if anything. I am not arguing that wireless is less efficient, but if it gets to as low as quoted (eg 50%), where are the losses going? heat, and if that gets too much, you have another issue ...
Wireless Charging Is a Disaster Waiting to Happen
We crunched the numbers on just how inefficient wireless charging is — and the results are pretty shocking
debugger.medium.com
Pretty sure it's 7.5W minimum based on the previous sentance in the article. 7.5W if something is attached, or if it can't detect if things are attached or not. 12/15W otherwise.
Yep, or about the fact that the iPhone 12 is $30 more expensive than they said on the presentation.
That is lab data... In real world usage most "wireless" chargers achieve a 30% efficiency, most of the power is converted to heat.
By the way, I have never found the appeal, just the fact that they call it "wireless" seems ridiculous to me when you clearly have a wire plugged into the outlet and your phone must have intimate contact with it, so much that it would not even charge sometimes if the contact is not properly aligned.
This is inductive charging, I will call a charging process wireless when it effectively happens contactless, over-the-air.
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"Every company shouldn't support wireless charging on their devices - it's up to 50% less energy efficient than wired charging."
I fixed the quote the way it should be. However, are you really saying, if a company does not purport to care about the environment, then go to town, be wasteful, pollute the environment. That is really the only way that could be interpreted, and what happens I guess, when you try to level unfounded criticism toward Apple.
Man. Some folks really bent out of shape over the most minuscule things. Getting fresh air is helpful.
You might be right there.
Nonetheless, if you were expecting 12 or 15W and you only get 7.5, that could be at least disappointing.
It’s unbelievable no one in the design saw this. It’s so evident that the cable is going to fray at the disc end.
I don’t agree with such statements unless spoken from a solar roof /s
They saw it. They know it will break and that most people will proceed to buy a new $39 charger.
Yeah. Mini will be my first phone with wireless charging, but I think I'm just going to keep using a wire.
Sure if people are that careless with cables
I’m still confused on why the 6 18w power bricks from Apple I have laying around only charge at 7.5 and I had to buy a 20w to get 15. It makes no sense.
While efficiency matters, the consequences of lower efficiency are a lot less when the device uses so little power to begin with. A wirelessly charged iPhone is still going to save tons of energy if you watch a show on it instead of a TV or browse the internet on it instead of a laptop or desktop.