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Qi Charging - Speeds, Amps, etc

I bought the Belkin qi for $49 CAD$ at Best Buy. They didn't have the new white one, but this one works great with my iPhone X. It is rated at 5W charging and has no problem charging overnight.

I also bought a cheap Adreama for $19 at local mall and it works fine, also is 5W according to specs and seems to work also.
 
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Knightcastle said:
With Qi charging is it just a case of using a 2A power brick and enjoying charging at the same speed as a 2A (iPad) charger with lighting? Or do you need to make sure you’re using a particular Qi charger?

Can you put the 29W charger into Qi?
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1. Wireless charging is very inefficient. Lossy double conversion.
It takes more power being driven into the coils than the device can receive and store. You probably need a 7.5-10w power adspter just to get 5w comparable charging speeds.

2. The wall charging isn’t the one doing the charging. The power supplies, and RF generating circuits in the Qi puck are doing the energy generation and they are only so strong for each different design. Each implementation will have its own limits.
 
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Menel said:
1. Wireless charging is very inefficient. Lossy double conversion.
It takes more power being driven into the coils than the device can receive and store. You probably need a 7.5-10w power adspter just to get 5w comparable charging speeds.

2. The wall charging isn’t the one doing the charging. The power supplies, and RF generating circuits in the Qi puck are doing the energy generation and they are only so strong for each different design. Each implementation will have its own limits.
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I bought the Mophi 7.5w wireless charger and realized that wireless charging is slow , period. So, just leaving the phone on my side night table charging over nite it is fine , but if I want to charge the phone fast I just use the regular wall charger or my mini Ipad charger combined with a USB-C to USB cable , the phone charges in less than 30 minutes .
 
latndude said:
I bought the Mophi 7.5w wireless charger and realized that wireless charging is slow , period. So, just leaving the phone on my side night table charging over nite it is fine , but if I want to charge the phone fast I just use the regular wall charger or my mini Ipad charger combined with a USB-C to USB cable , the phone charges in less than 30 minutes .
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Yes. Correct.

I have one of the $12, drilled it into my nightstand. It has me at 100% the next morning. Watched it during day, it seems like the 5w charger.

Also, fast charging means more heat, and could reduce longevity on your battery, fewer recharge cycles, quicker wear and tear. Its best to only do when you really need it.

https://www.sciencedaily.com/releases/2015/04/150414094117.htm
 
Mad how many people will buy something just because it’s on the Apple site
 
latndude said:
I bought the Mophi 7.5w wireless charger and realized that wireless charging is slow , period. So, just leaving the phone on my side night table charging over nite it is fine , but if I want to charge the phone fast I just use the regular wall charger or my mini Ipad charger combined with a USB-C to USB cable , the phone charges in less than 30 minutes .
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It will fast charge when apple enable the wireless fast charging.

wireless charging is something i use when i go to bed and when i don't need a fast charge. Can just leave it on the side without worrying
 
There is a Belkin wireless charger available separately without the Adapter that is about half the price (£30 in the UK) - anyone tried that? I have lots of USB adapters around the house I can reuse and that brings the price down.
 
Knightcastle said:
Mad how many people will buy something just because it’s on the Apple site
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These products are not all created equal just because they support the Qi standard.

We've gone from it only being safe to charge an iPhone with an MFI certified cable and power adapter, to the wide world of cheap $9 Amazon chargers.

Forgive me if I'm not going to use those with my $1000 iPhone.
 
Why not just buy a £15 fast charger off amazon?

That way you know that the limitation is the phone, and if you ever upgrade to a phone that supports proper wireless charging speeds, you won't need to upgrade the charger.
 
PastaPrimav said:
These products are not all created equal just because they support the Qi standard.

We've gone from it only being safe to charge an iPhone with an MFI certified cable and power adapter, to the wide world of cheap $9 Amazon chargers.

Forgive me if I'm not going to use those with my $1000 iPhone.
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Bit different considering Qi doesn’t penetrate anything. Putting a fake charger in your phone could cause physical damage, cheap Qi plates won’t damage anything.
 
just talked to apple apparently our phones dont light and show texts when its on the wireless charger, all it does is make a sound. so i guess it hasnt been enabled by apple yet to do this.

ive been having this problem where the phone will be on the wireless charger, ill hear the sound of a text but the screen doesn't light up and it wont wake when i tap it. (itll let me wake to tap if no text came through)

however when its being charged regularly itll all light up when i get a text

this is kind of annoying and has to be something that apple needs to do in software
 
tromboneaholic said:
I’ve seen several of these on Amazon where the seller/manufacturer says to only use with 2A. There is a difference between watts and amps, but I’m not an electrical engineer. My simple understanding is that amps allow more of charge to pass quickly to make up for the loss of watts due to inefficiency in wireless chargers.
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only part you got right is you are not electrical engineer.
Watts / volts = amps

5 Watts / 5 Volts = 1 Amp. The power adapter that comes with Phone

12 Watts / 5 Volts = 2.1 Amps. The iPad power adapter

29 Watts / 5 Volts = 5.9 Amps. The power adapter for highest fast charging of iPhone X

Using after market cheap inductance pads and poorly designed power adapters with Amazon BS recommendations is well BS. Chances of getting it right or matching up components that work with each other is problematic

Right now Mophie and Belkin make Apple approved inductance pad chargers that currently will feed 5 Watts to the iPhone X and 8s. Coming soon will be software upgrade that bumps this to 7.5 Watts max.

That’s it, that is all you will get from inductance pad charging for this go around. Add 2,000 watt power adapter to some third party charging pad and you won’t get anything more to the phone than 7.5 Watts. No matter what nonsense you read on Amazon.
 
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HEK said:
only part you got right is you are not electrical engineer.
Watts / volts = amps

5 Watts / 5 Volts = 1 Amp. The power adapter that comes with Phone

12 Watts / 5 Volts = 2.1 Amps. The iPad power adapter

29 Watts / 5 Volts = 5.9 Amps. The power adapter for highest fast charging of iPhone X

Using after market cheap inductance pads and poorly designed power adapters with Amazon BS recommendations is well BS. Chances of getting it right or matching up components that work with each other is problematic

Right now Mophie and Belkin make Apple approved inductance pad chargers that currently will feed 5 Watts to the iPhone X and 8s. Coming soon will be software upgrade that bumps this to 7.5 Watts max.

That’s it, that is all you will get from inductance pad charging for this go around. Add 2,000 watt power adapter to some third party charging pad and you won’t get anything more to the phone than 7.5 Watts. No matter what nonsense you read on Amazon.
Click to expand...
All I know is with my 10w 2A iPad adapter, the cheap pad charges the iPhone to 100% and it doesn’t get hot.
Manufacturer specifies 2A plug/adapter. That’s the empirical data I’m working with, Mr. Engineer.
 
here's what it says on the bottom of the one i just ordered. will this work?
 

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