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[Official] Qi Wireless Charging Discussion Thread

OP jayharper08

29th November 2012, 03:53 AM   |  #1  
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There were a couple of threads pop up about the Qi wireless charging. Unfortunately, they turned out to be members (not just one) just trying to sell their products. This will serve as an official discussion thread about the Qi Wireless Charging System for people with inquiries about it. You may post a review video if you have the system, but we will be watching closely. If we see that you are trying to run a business off of XDA's back, you will be infracted/banned for good. XDA is not a place to promote your business. Part 11 of the forum rules:



11. Don’t post with the intention of selling something.
Don’t use XDA to advertise your product or service. Proprietors of for-pay products or services, may use XDA to get feedback, provide beta access, or a free version of their product for XDA users and offer support, but not to post with the intention of selling. This includes promoting sites similar/substantially similar to XDA-Developers.com.
Do not post press releases, announcements, links to trial software, or commercial services. unless you’re posting an exclusive release for XDA-Developers.com.
Encouraging members to participate in forum activities on other phone related sites is prohibited.
Off-site downloads are permitted if the site is non-commercial and does not require registration.
Off-site downloads from sites requiring registration are NOT encouraged but may be permitted if the following conditions are met:
A) the site belongs to a member of XDA-Developers with at least 1500 posts and 2 years membership who actively maintains XDA-Developers' support thread(s) / posts, related to the download,
B) the site is a relatively small personal website without commercial advertising/links (i.e. not a competitor forum-based site with purposes and aims similar to those of XDA-Developers.com.)


So please keep this in mind while you discuss it. Have a good time guys!
Last edited by jayharper08; 29th November 2012 at 03:22 PM.
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29th November 2012, 04:03 AM   |  #2  
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I'd like to start it off with a wireless charging kit I purchased that comes with a receiver and transmitter.
The manufacturer is called Yijieneng.
The receiver fits underneath the battery door with no modification required.
From what I've noticed about it, it charges a little faster than USB but not as fast as an AC adapter. (according to the receiver, it charges at 700mAh)
NFC works with this kit.
As far as I've noticed, the range is about 4mm (from transmitter surface to battery case) for there to be a successful charge.
The transmitter emits a small beep when it starts the charge. I've had it next to my bed for the past few weeks and I don't hear it when I sleep if it goes off. It does keep my phone at 100% in the morning.

At this time I'm also creating a custom dock that will put the phone up at an angle like a dock. I have finished the core part of it, but still waiting to finalize the ridge that will hold the phone. I'm waiting to get a certain bumper case before I create the final ridge.
Here's a few pictures of the dock in its current form (it still needs to be sanded and have the surface reworked):
https://www.dropbox.com/sh/4bcgiapslrawvcs/yIOWW5Fybz#/
Here's a video of the kit that I shot showing how it works as well as NFC function.



FAQ (Frequently Asked Questions)
Charging range and case choices:
*
Quote:
Originally Posted by kraminc

Quote:
Originally Posted by 1SiK1500

is it possible to use Cases Such as Otterbox Commuter with the QI PAD? Does the signal transmit through?

Yes I am currently using the defender with the dual energizer pad nightly with no issues.

Sent from my SPH-L710 using Tapatalk 2

* Ballistic SG Maxx Case as well as the Ballistic SG
* UAG (Urban Armor Gear)

Are Qi products intercompatible?
Quote:
Originally Posted by chrootz

I bought a Nokia wireless charging plate uses Qi standards, I got it from Verizon Wireless online with my work discount, It cost me for 40 dollars and I am using Yijieneng Qi pad.

My s3 use UAG case (Urban Armor Gear), It does transmit the wireless charging through the case and It runs like charm.

As far as I know, the charging distance is between 4mm to 4cm (if the transmitter is based off the newer standard)

Charging speed
Depending on the receiver it can range from 500ma to 700ma (this is roughly the speed of usb charging or a little faster)

Does NFC Work?
I can't vouch for ALL the Qi kits out there, but the Yijieneng one that I do posses, works. Reference the above video to show that it works.


Available Products
Wireless Charging Kits (This includes both receiver and charger):
Yijieneng kit. Comes with a receiver pad that fits underneath the battery door and a transmitter.
Warning: I highly suggest getting just the receiver pad from them rather than the whole kit. Apparently the 2nd version seem to be problematic and requires an exact placement. You can find the transmitter at your local phone store like AT&T and Verizon or get it from sites like Amazon and such for the Energizer Qi charging pad.
As for those who are asking how to purchase this, this is what some of the members have done.
Quote:
Originally Posted by grubia

Quote:
Originally Posted by redslumber

Just read through the thread and I think I might consider the Yijieneng receiver and charging pad. For those of you that have successfully purchased the kits from Yijieneng: How was the communication service and shipping promptness from them, and what's the price for the charging pad and the receiver (as they don't have any price listings on their site).

Hi,
Communication is slow, use messenger links on their site.
Price of the unit is 55$ + shipping cost. Mine shipping was 30$ via DHL.
Took them more than a week after completed payment to send the item. I was about to contact paypal to help me get my money back ...

Quote:
Originally Posted by grubia

The prices are from their pricelist which you can request and the prices are for "sample". Prices for bulk are more than half way down ...

With the pricelist they've send me 2 pdfs with company presentation. They seems to be big oem manufacturer for the most of QI enabled charging pads (incl energizer). But this is only if you can trust what is written in presentation pdfs and in my experience with Chinese companies like this is that the truth in presentations is less than 40% ....




Zens wireless charger
. They sell the whole kit for something around $80 or $90 (I think). Comes with a case and transmitter.

Droidax EzyCharge
Here's the link to their review: http://www.androidunite.com/2012/11/...for-galaxy-s3/
Comes with a case and transmitter.

Speed
New HK brand. Seems to have a full kit available. Receiver backing goes for ~25 USD (208 HK$). Transmitter goes for ~$50 (388 HK$).
http://www.speed-charger.com/en/home


Disclaimer: Touchstone, Qi, and Powermat are not compatible with each other. As of this edit (12/15/2012), none of these charging standards and their products will work with the other's product no matter what anyone tells you. In the future, there might be a universal charger, but right now, none exist.



Kits to AVOID
Kaneda Wireless Powerbank
http://forum.xda-developers.com/show...&postcount=125


EDIT: Added some extra info

EDIT 2: There are many members who have asked me where I got this kit from and the best I can and am allowed to disclose is that you would have to look up the manufacturer and contact them yourself. As far as I was reading, various members have actually directly contacted the manufacturer through their website and did their own transaction there. I personally have not done it before so I can not guarantee anything. I also do not know how much they charge nor do I know what kind of payment they take so your best bet is to talk to them. I only have this one kit that I have shown in the video and no it will not be sold to anyone (I like it too much and use it too much for me to even think about giving it up)

EDIT 3: Added info on other Qi chargers. Will add more info and pictures of other chargers and/or receivers as I find them.
EDIT 4: added more info based on what I missed previously .
EDIT 5: Added a Kits to avoid section.
EDIT 6: Added warning on 2nd gen Yijieneng transmitter issue. Added new kit
Last edited by mputtr; 29th December 2012 at 07:59 PM.
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29th November 2012, 05:25 AM   |  #3  
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I have the same kit as above. Works great. Going to picking up a couple extra charging pads for around the house.

Sent from my A510 using Tapatalk 2
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29th November 2012, 07:13 AM   |  #4  
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Same here!

Using this with a couple of energizer qi pads.

Also modified the receiver that goes under the battery door so that it works with the 4200mah extended battery and battery door.

Sent from my GT-I9300 using xda premium
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29th November 2012, 04:10 PM   |  #5  
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I'm such a sucker for stuff like this. But I have a hard time spending what looks like 85 for the pad and receiver for something that I most likely won't be able to use on my next device. This would be high on my list if I was capable of keeping a phone for over a year!
29th November 2012, 05:13 PM   |  #6  
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Quote:
Originally Posted by pdubcramp

I'm such a sucker for stuff like this. But I have a hard time spending what looks like 85 for the pad and receiver for something that I most likely won't be able to use on my next device. This would be high on my list if I was capable of keeping a phone for over a year!

The charging base can be used for other qi compatible phone, so it's not a waste, while the receiver, it can be modded to support other phones.
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29th November 2012, 05:58 PM   |  #7  
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Quote:
Originally Posted by kms108

The charging base can be used for other qi compatible phone, so it's not a waste, while the receiver, it can be modded to support other phones.

Absolutely valid points. However I think I'll let the technology mature and adoption to increase a bit more. I'm sure prices will drop drastically.
29th November 2012, 06:14 PM   |  #8  
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Just wanted to post a walkthrough video of the Droidax EzyCharge Wireless Charging kit. I'm really considering opening the case up and seeing what kind of receiver is inside and possibly fitting it under the back of my phone and if I do it I'll update this post. Otherwise, I think its a great 3-purpose combo (case, wireless charger and backup battery) especially for the price when compared to the competition. The pad can be sold seperately and charges any device thats Qi compatible so thats always a plus. If anyone finds a cheap and slim Qi receiver being sold stateside let me know I really want to get a couple. Thanks!



---------- Post added at 11:14 AM ---------- Previous post was at 11:09 AM ----------

By the way, If I may, I'd suggest making this post a sticky since it gets brought up a lot.
29th November 2012, 07:48 PM   |  #9  
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Quote:
Originally Posted by pdubcramp

Absolutely valid points. However I think I'll let the technology mature and adoption to increase a bit more. I'm sure prices will drop drastically.

The technology is already actively used in Japan, but it has yet to receive a wider audience. Some phones also come built in with with Qi wireless charging like the Droid DNA and the Lumia 920. Hopefully there will be more and more devices that have it built in and then hopefully the "battery covers" for those phones will be sold on sites like amazon or ebay that comes w/ the qi receiver that you can remove and mod into the s3..
30th November 2012, 05:01 AM   |  #10  
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I also have the kit in the first post. I like it well enough. I use it at work all day. I am having an issue where I cannot receive phone calls while charging on the pad. Anyone else experience this? I have the leaked jelly bean k1 build. Just stock leak. No mods. Any ideas?

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