iPhone X iOS 11.2 fast QI charging?

[iTosaf]

Hi everyone,

On Saturday I updated my iPhone X to iOS 11.2 and wanted to see the wireless charging speed improvement, so I filmed it using my iPad Pro:

The iPhone was connected to a fast $20 wireless QI charger via iPad usb ac adapter over Kill a Watt.
I was surprised after discovering that the actual charging speed was SLOWER after the update.

Please watch the video and tell me what do you think.

Did you get the same experience?

Sorry about the shaky video, it was originally recorded to my private purposes only.

 

[Helloimjacob]

I bought a wireless Mophie charging base, thinking it would fast charge and it does not. At all. Charges at the same speed as the regular 5W Apple charger. Waste of money

 

[Buran]

There was a test posted recently showing that the difference is negligible until the battery is about 70% charged. In other words, it's probably not really worth it for most people.

If you are buying an inductive charger that does not come with an AC adapter, get a fast charging adapter since you'll need an adapter anyway -- just don't spend a lot of money doing so since the difference isn't dramatic. But if you have a charger that came with an AC adapter or is built into something else (like one of the Ikea lamps that offers an integrated charger), don't worry about the difference.

It would be nice to see a confirmation on the phone that fast charging is in use -- say, a different color on the battery indicator rather than the default green. That's the only way you'll really be likely to notice it.

 

[loftiness]

charging rate (as shown by the power draw) is usually not constant throughout the entire process, so it's hard to compare since you didn't show the charge level percentage in your video.
Better yet, you could do a charging test from fixed percentages (assuming calibration is good), say from 0% -> 100%. Other sources I've seen reports it been faster though (

)

 

[iTosaf]

I did the test with the same iPhone X: it was at 41% the battery charge, then I charged it for about a minute (recorded the watt usage), then updated it to 11.2 and charged it again for about a minute and recorded the watt usage. Then I compared both of the results and discovered that it never went higher than 7.6 Watt after the update, but before it went all the way to 8.9 watt and stayed most of the time above 8 watt. It was performed using the same qi charger and iPhone so? Isn't it obvious that that much of a difference is a big difference?

 

[loftiness]

you want to charge from the same percentage and same span of time, I would say 1 min is too short to establish any kind of pattern.

also, would help everyone else: what kind charger are you using? apparently some sources say fast charging is limited to some newer WPC-certified Qi chargers.

 

[iTosaf]

you want to charge from the same percentage and same span of time, I would say 1 min is too short to establish any kind of pattern.

also, would help everyone else: what kind charger are you using? apparently some sources say fast charging is limited to some newer WPC-certified Qi chargers.

I use a cheap $20 amazon charger connected via iPad USB adapter.
https://www.amazon.com/gp/aw/d/B075GQ8MM1?psc=1&ref=yo_pop_mb_pd

The iPhone battery was at 41% before update and in that range after because the firmware update time can not discharge the battery and 1 minute charging time can not charge it too much.

My point was the watt draw difference.
The point is that if new Apple firmware limited the charge draw to 7.6 watt max, when it was 8.9 watt before, that means it is slower.

I do know that many wireless chargers can not charge the iPhone faster than 5 watt (only android phones charge faster) because of Apple software compatibility limit.
But, I was lucky with the charger I got because it still works without the 5 watt limit.

 

[CobraPA]

I tested a couple wireless chargers here before 11.2 and was able to reach just under 7W ( around 6.8 .) So I don’t expect to see much higher with 7.5 enabled in 11.2. I guess it could be up to 8 or 9 W when accounting for loses, but I saw more variability in Watt draw based on centering the phone on the pad.