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Qi Wireless Charging Kit turns on and off repeatedly

I bought a generic Qi wireless charging kit. It has a white receiver which you open up the back cover of the galaxy s4 and then fit the prongs in place. Then closed the back cover and put it on my charger pad. The charger pad is powered by my OEM Samsung 2A output adapter so that should be plenty of power. There are two lights, one red that is constantly on which I assume is the power light. The other light is green, but it flashes. I'm not sure if it is supposed to do this, but pretty sure it is not as my phone will display a popup notification that wireless charging is enabled. One second later, the popup is gone and the battery icon no longer shows the thunderbolt charging symbol. Another second later, the notification comes back and the battery icon shows the thunderbolt charging symbol. So both the charger pad flashes and my phone's notification and battery charger icon appear and disappear every few seconds repeatedly, anyone know what is going on?

Kind of hard to tell without seeing which one you specifically have. Got any links? Have you made a good connection with the contacts on the back of the phone? And are you placing the phone in a good spot on the charger? I have 2 qi receivers like yours and I don't have these problems unless I'm using the official nexus wireless charger. I think the magnets in it do something to offset it. I have another wireless charging pad and I don't have these problems at all.

Stealyourface said:
Kind of hard to tell without seeing which one you specifically have. Got any links? Have you made a good connection with the contacts on the back of the phone? And are you placing the phone in a good spot on the charger? I have 2 qi receivers like yours and I don't have these problems unless I'm using the official nexus wireless charger. I think the magnets in it do something to offset it. I have another wireless charging pad and I don't have these problems at all.
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I actually do have the link: http://www.ebay.ca/itm/181216698737...eName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
I made sure to buy the GS4 i9500 and almost certain this is a right purchase as the prongs fit perfectly. Based on the instructions, the actual charger is under the symbol/icon, which I have tried to place perfectly. Heck, I tried so many spots with no success. I'm not sure if the receiver is faulty or if the charge pad is faulty. I'm looking into a ChoeTech and Incipio Qi charger right now as its around 30 bucks and have quite some positive reviews.

Well that thing is one of the thicker ones. And I've never liked the design of it. I'd definitely switch receivers. Then chargers if you problem still occurs.

1. check to make sure the contacts on the receiver are not getting disconnected inside the phone.
2. you need to find the sweet spot on your pad when you put your phone on it

Well, I'm in the process of getting a refund on eBay. Guess I'll have to go for a more branded charger instead of some no-name generic.

Qi Chargers?

Has anyone tried one of those Qi charger films you can find on ebay or amazon that plug into your micro usb port and slip into the back of your case or cover? Do they work? Are they slow as sin?

Our phones are powermat only. No qi for us. Stupid ATT
Sent from my LG-D850 using XDA Premium 4 mobile app

conan1600 said:
Has anyone tried one of those Qi charger films you can find on ebay or amazon that plug into your micro usb port and slip into the back of your case or cover? Do they work? Are they slow as sin?
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In reading the original XDA LG G3/Accessories forum, somebody posted about using one of these and it worked fine. The only drawback is that you lose the functionality of the USB port. I've been using Qi charging with my GALAXY S3 and don't really use the USB port anymore. Not sure if that would be a deal breaker, but since you're asking the question, it probably isn't. If you buy one of these USB receivers, buy the correct orientation for the plug. The receiver plugs are made two ways, fat side up or fat side down.
I'm on the fence with this phone. Really like it's camera, form factor, the buttons on the back are more convenient & natural to me. The charging thing has put me off. If AT&T would give the Duracell PMA chargers away, it would be easy.
But, I suppose that if one was to add the USB Qi receiver under the case, get a PMA back (when available, only Circle case available currently), you would have all charging possibilities covered!

I was wondering about taking one of the folio cases from Verizon since theirs uses qi and put it on ours. Wouldn't that work? Cut off the front flap? (I don't really care for the folio cases myself.)

Reggie, that won't work. The Qi charging isn't enabled on the AT&T G3. Don't waste your money.
Sent from my LG-D850 using Tapatalk

ATT has a deal with powermat to be the wireless charging manufacturers for our g3. Imo I like the powermat and it's pretty cheap on Amazon right now. Got 2 for 20 bucks. Charged pretty fast also. Lets not look at what's wrong but instead look at what lg got right with this device.
Sent from my LG-D850 using XDA Premium 4 mobile app

If you want to use a case that utilizes the wireless charging contacts on the back of the phone (under the back cover), then you need to use a Powermat charging coil.
If you want to use a system that plugs into the USB port to charge, you should be able to use any system that you want as it by-passes the wireless contacts. The USB port has no restriction as to what type of power it accepts.

sic0048 said:
If you want to use a case that utilizes the wireless charging contacts on the back of the phone (under the back cover), then you need to use a Powermat charging coil.
If you want to use a system that plugs into the USB port to charge, you should be able to use any system that you want as it by-passes the wireless contacts. The USB port has no restriction as to what type of power it accepts.
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I dont see why a qi wouldn't work, it's just inductive charging. not magic, is there something in the standard the maybe uses the NFC to do some sort of handshake?
I do know there's two pin types on these phones, if you look at the contacts on the case it's either 4 contacts or 2 contacts, space, 2 contacts.
just gotta get the one with the space. also you can get the sticker from here: http://www.aliexpress.com/item/Fact...G-G3-CASE-D885-D830-D851-D850/1971193812.html and just peel off the nfc sticker you currently have and replace it.

screwyluie said:
I dont see why a qi wouldn't work, it's just inductive charging. not magic, is there something in the standard the maybe uses the NFC to do some sort of handshake?
I do know there's two pin types on these phones, if you look at the contacts on the case it's either 4 contacts or 2 contacts, space, 2 contacts.
just gotta get the one with the space. also you can get the sticker from here: http://www.aliexpress.com/item/Fact...G-G3-CASE-D885-D830-D851-D850/1971193812.html and just peel off the nfc sticker you currently have and replace it.
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It's a different voltage, and the way inductive charging works the Att one doesn't have the hardware for it. It only has hardware for pwa so it won't work.
Sent from my Nexus 7 using XDA Premium 4 mobile app

I'll add my experience with Qi here. I've got two of them, one on Note 3 and the other on a Nexus tablet. There are two problems that I see. The first is that there isn't any centering mechanism so sometimes the device doesn't sense the charger and doesn't charge. The second is that sometime after a power failure the charger has to be reset before it will charge. In both cases you wind up with a dead device.
I'm about to switch to the PMA charging and will see how it fares. At least it has a magnetic centering mechanism (or so I've been told).
Sent from my SAMSUNG-SM-N900A using XDA Free mobile app

stuartr said:
I'll add my experience with Qi here. I've got two of them, one on Note 3 and the other on a Nexus tablet. There are two problems that I see. The first is that there isn't any centering mechanism so sometimes the device doesn't sense the charger and doesn't charge. The second is that sometime after a power failure the charger has to be reset before it will charge. In both cases you wind up with a dead device.
I'm about to switch to the PMA charging and will see how it fares. At least it has a magnetic centering mechanism (or so I've been told).
Sent from my SAMSUNG-SM-N900A using XDA Free mobile app
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If you mean a bulky magnet that's in the quick circle case then yes it has "centering". I prefer qi because the receivers are thinner, and it's easier to find chargers and qi tags.

[Q] Would wireless qi mod be possible?

So I noticed the wireless QI receivers have started becoming literally paper thin lately.
And with this girls teardown, https://www.youtube.com/watch?v=dweww9_RF2E#t=224
I think it looks like you could remove the thin plastic over the battery, and fit a QI receiver there.
Thoughts?

Shadowdancer123 said:
So I noticed the wireless QI receivers have started becoming literally paper thin lately.
And with this girls teardown, https://www.youtube.com/watch?v=dweww9_RF2E#t=224
I think it looks like you could remove the thin plastic over the battery, and fit a QI receiver there.
Thoughts?
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we wouldn't be able to remove that plastic piece because it hold the battery, but it is stil possible. i already did recon on some places to solder in a wireless charger.

Legacystar said:
we wouldn't be able to remove that plastic piece because it hold the battery, but it is stil possible. i already did recon on some places to solder in a wireless charger.
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Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?

Shadowdancer123 said:
Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?
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That's my theory since the nexus 6 has wireless and they are the same chassis essentially . or it was for a fingerprint scanner they abandoned. Once we see a nexus 6 teardown we will have a better idea if we can do it.

Legacystar said:
Once we see a nexus 6 teardown we will have a better idea if we can do it.
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Been waiting for that...

Shadowdancer123 said:
Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?
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Could have sworn I read somewhere that between they cable and a teardown of the software showing code for a fingerprint scanner, the original idea was to have the scanner. I could be wrong though.

gotzaDroid said:
Could have sworn I read somewhere that between they cable and a teardown of the software showing code for a fingerprint scanner, the original idea was to have the scanner. I could be wrong though.
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Let's hope you're wrong then.
It would be really cool to have wireless charging, shame so few manufacturers add this.
The amount of stuff needed to make the coils on the receiving end is pretty limited, I could absolutely accept buying the transmitter separately, (like the turbo charger is now)
But I suspect the patent royalties are expensive, patents sure don't benefit users..

Wireless charging
Anyone able to confirm if this is possible after the nexus 6 tearnever down?

bleys121 said:
Anyone able to confirm if this is possible after the nexus 6 tearnever down?
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Looks like the nexus 6 has a different config then the moto x so as far as a plug and play solution, no. I have located 2 contact locations where we could solder in a qi coil. I'm just trying to work up the courage to try it lol

Here is a related question: without modding the phone itself on the 2013 and 2014 model I cant get one of the QI receivers to work. This is the one for sale on eBay / amazon / newegg with a micro usb end to plug into the micro usb port. It literally works with every other micro usb device i own including a Samsung bluetooth headset, several phones and some other stuff i cant think of at the moment... On the moto x 2013 and 14 I literally see no charge and see it actively loose charge over time with this device plugged in.

It may be tricky with the moto x. There are some negative and some positive reviews here for example: http://www.amazon.com/gp/aw/cr/B00MN3RR7Q/s=sd/ref=mw_dp_cr
There are also some reviews saying they needed to restart the device once while on the charger: http://www.amazon.com/gp/aw/review/B00H7FJX7M/R2YPDLOU1BD4QE/ref=mw_dp_cr?cursor=2&sort=rd
You can find more of those comments on the internet. Could you try that, and if it works clarify if you need to restart it every time you want to charge or every time you connect something else?
Here is another link for the original moto x: http://www.reddit.com/r/MotoX/comments/2gskxw/original_moto_x_wireless_charging_mod_qi/
Edit: you may need a screen lock, e.g. the pattern lock.
http://forum.xda-developers.com/showthread.php?t=2596469
An unrooted Moto G needs to be screen locked (I use the pattern lock type) or it will refuse to charge due to the missing pins. You can unlock the screen while it is charging as long as you don't lift it from the qi charger. (tested on 4.3 and 4.4.2, DE and FR firmware)
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Legacystar said:
Looks like the nexus 6 has a different config then the moto x so as far as a plug and play solution, no. I have located 2 contact locations where we could solder in a qi coil. I'm just trying to work up the courage to try it lol
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Go for it lol! Take some nice pics if you do. You'd be my hero.
Sent from my Nexus 5 using Tapatalk

Well chaps, bad news. I don't think this is going to be possible. I spent 6 hours today trying various solder points. Couldn't get any of them to actually charge the battery. Seems to be some sort of system configuration thats interfering with how its detecting .

Legacystar said:
Well chaps, bad news. I don't think this is going to be possible. I spent 6 hours today trying various solder points. Couldn't get any of them to actually charge the battery. Seems to be some sort of system configuration thats interfering with how its detecting .
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Did you look at /sys/module/msm_otg/parameters/floated_charger_enable? It might not be enabled. Here's a similar thread for the Moto G:
http://forum.xda-developers.com/showthread.php?t=2688276 (see the update at the top)
http://forum.xda-developers.com/showthread.php?t=2601628 (thread for the app, not sure it works on X2 but you can check manually through ADB for the above /sys path).
As far as I know, wireless charging won't work without a pattern lock or having that option set. My Moto X won't be here until next week so I can't do any testing until then.

romracer said:
Did you look at /sys/module/msm_otg/parameters/floated_charger_enable? It might not be enabled. Here's a similar thread for the Moto G:
http://forum.xda-developers.com/showthread.php?t=2688276 (see the update at the top)
http://forum.xda-developers.com/showthread.php?t=2601628 (thread for the app, not sure it works on X2 but you can check manually through ADB for the above /sys path).
As far as I know, wireless charging won't work without a pattern lock or having that option set. My Moto X won't be here until next week so I can't do any testing until then.
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I tried pattern lock, didn't help. Wireless charging does not require a lock, my girlfriend has a droid maxx and wireless works without it.
As far as the module check, I don't have root on Verizon so I wouldn't be able to test it.

Legacystar said:
I tried pattern lock, didn't help. Wireless charging does not require a lock, my girlfriend has a droid maxx and wireless works without it.
As far as the module check, I don't have root on Verizon so I wouldn't be able to test it.
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You are correct about wireless charging in general. I think the reason the pattern lock is suggested is because the wireless mod (even without internally mounting it) only provides 2 wires on the USB connector. Something about only having 2 wires, and not the data pins, is why the locking is suggested.
No worries on the module, just something I had seen while investigating. I don't know if the Maxx supported wireless charging out of the box, but it may have the flag enabled by default (that flag seems common among many Moto devices).
I'm coming from a Nexus 5 and I'll really miss wireless charging, hence my questions to you

romracer said:
You are correct about wireless charging in general. I think the reason the pattern lock is suggested is because the wireless mod (even without internally mounting it) only provides 2 wires on the USB connector. Something about only having 2 wires, and not the data pins, is why the locking is suggested.
No worries on the module, just something I had seen while investigating. I don't know if the Maxx supported wireless charging out of the box, but it may have the flag enabled by default (that flag seems common among many Moto devices).
I'm coming from a Nexus 5 and I'll really miss wireless charging, hence my questions to you
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The Maxx has it built in from moto, same internals as the moto x essentially. If we get root I could look at the module thing. I was lucky that I had access to a spare moto x main board so I didn't have to solder on mine. That won't be the case in the future.
I'm going to post all the points I tried so maybe someone can figure this out. I was able to get it to show charging but only right after reboot and it would stop once I took it off and replaced it. I have to emphasize it showed charging but never actually charged the battery, it would show charging in battery stats bit not in the status bar. I also use battery monitor widget to check the current and it never showed positive charge current. Once I was able to get it to details at as a USB charge, only happened once, still didn't charge though.
This all makes me think there is something screwy going on.

Legacystar said:
The Maxx has it built in from moto, same internals as the moto x essentially. If we get root I could look at the module thing. I was lucky that I had access to a spare moto x main board so I didn't have to solder on mine. That won't be the case in the future.
I'm going to post all the points I tried so maybe someone can figure this out. I was able to get it to show charging but only right after reboot and it would stop once I took it off and replaced it. I have to emphasize it showed charging but never actually charged the battery, it would show charging in battery stats bit not in the status bar. I also use battery monitor widget to check the current and it never showed positive charge current. Once I was able to get it to details at as a USB charge, only happened once, still didn't charge though.
This all makes me think there is something screwy going on.
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I ordered a Pure Edition (Cyber Monday deal was a great one) so if nothing else I'll have root to poke around. Pictures of where you tried would definitely be helpful. I think I saw some from you in another thread, but all in one place would make searching easier
A 5V near the USB port would be ideal because then we'd know its likely feeding into the battery or charge circuit. 5V elsewhere on the board may not be wired to the battery. Looking at the photos in that Moto G thread may give you an idea on where to poke around with a multimeter.
The charging after a reboot, and until you picked it up, sounds like maybe you did have it at one point. That whole "until you pick it up" is another thing mentioned by many in those Moto G threads.
What wireless charging receiver did you use (not your base station)? The one I ordered says "up to 1000mAh" but I had seen some at 500 or 650. A lower output rating may not be enough to charge the battery at all. One way to test this would be a very low output wall charger (one that puts out 500mAh for example) and see if the X shows charging when connected to that.
On a related note, how hard is it to disassemble the X? Some of the teardowns look like it could be a pain.

romracer said:
I ordered a Pure Edition (Cyber Monday deal was a great one) so if nothing else I'll have root to poke around. Pictures of where you tried would definitely be helpful. I think I saw some from you in another thread, but all in one place would make searching easier
A 5V near the USB port would be ideal because then we'd know its likely feeding into the battery or charge circuit. 5V elsewhere on the board may not be wired to the battery. Looking at the photos in that Moto G thread may give you an idea on where to poke around with a multimeter.
The charging after a reboot, and until you picked it up, sounds like maybe you did have it at one point. That whole "until you pick it up" is another thing mentioned by many in those Moto G threads.
What wireless charging receiver did you use (not your base station)? The one I ordered says "up to 1000mAh" but I had seen some at 500 or 650. A lower output rating may not be enough to charge the battery at all. One way to test this would be a very low output wall charger (one that puts out 500mAh for example) and see if the X shows charging when connected to that.
On a related note, how hard is it to disassemble the X? Some of the teardowns look like it could be a pain.
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i've attache da picture of the points i used and the results are as follows.
1. shows 5v when plugged in. when wireless coil is attached to it, will power the phone up without the battery connected (doesn't boot, just shows a battery on screen)
2. pretty much exactly the same as spot 1
3. shows 5volts but doesn't power the phone
4. shows 5v but doesn't power the phone
5. you can't see it in the picture because the rubber cover for the usb port is on but there is a diode right behind the usb port. this one is the only port i was able to get it to say usb charging ONCE. other then that, acts the same as 1 and 2.
again i have to emphasize that even though they show charging initially, they never actually charge the battery.
I'm using a galaxy s3 qi insert 700ma. i think there is a mislabeling on some qi pads saying 1000ma but not considering the 30% loss in inductive charging. even ones with 1000 on them tend to charge around 650ma. some label including the loss.
As far as teardown it's not too complicated to get the back off, lots of adhesive so be careful to not bend the back cover. i have leather so that was a particular hassle as i didn't want creases in the leather. after that there are 17 screws to remove. i've included a picture of the ones you need to remove. the ones around the silver ring on the "moto" logo don't need to be removed along with the silver screw for the buttons.
after you remove the screws and disconnect the buttons and battery from the board the back battery plate comes off in one piece. one of the particularly hard parts about testing points is you can't turn the phone on because the power button is part of the battery plate. also when you put the battery plate back on and you have wires running to contact points it won't fit because there is a speaker "box" that sections off that circuitry. i combated this by using copper tape to essentially make my own tiny custom circuit pathways leading out of that box where i then could attach wires and run them up through the hole that the battery connector goes.
THIS IS NOT FOR THE FAINT OF HEART!

i'm going to write up a tear down guide for this phone. what section do you guys think i should post it in?

[Q] Found a flex cable QI mod? Maybe?

I found this when looking for QI receivers for my XT1092, and it appears to be designed for internal mounting!?
http://www.aliexpress.com/snapshot/6698695850.html?orderId=67539862048322
Has anyone else seen this, and does anyone, who has actually torn their phone down, think there's a free slot for this anywher?
I assume that it requires some form of modding to the battery mount, as that's the only area where you could potentially get a fraction of a millimeter to use.

Very cool find! The pattern of it looks correct to work and I do believe there may just be a spot to connect it. I just assembled a Moto X the other day. I have some pieces and will look tonight.

Shadowdancer123 said:
I found this when looking for QI receivers for my XT1092, and it appears to be designed for internal mounting!?
http://www.aliexpress.com/snapshot/6698695850.html?orderId=67539862048322
Has anyone else seen this, and does anyone, who has actually torn their phone down, think there's a free slot for this anywher?
I assume that it requires some form of modding to the battery mount, as that's the only area where you could potentially get a fraction of a millimeter to use.
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I was looking at a teardown video for the Moto X 2014, and this just looks like the NFC coil. Besides, I don't think NFC and wireless charging can share the same two contacts. I am pretty sure you would need a pair of contacts for the NFC coil and another pair for the inductive coil.
Edit: Or you would need atleast a chip onboard that can route all that current when charging to the charging circuitry and not fry the NFC hardware, and use it as a transceiver for NFC while not charging. I don't know if they even do things like that.

walrusmonarch said:
I was looking at a teardown video for the Moto X 2014, and this just looks like the NFC coil. Besides, I don't think NFC and wireless charging can share the same two contacts. I am pretty sure you would need a pair of contacts for the NFC coil and another pair for the inductive coil.
Edit: Or you would need atleast a chip onboard that can route all that current when charging to the charging circuitry and not fry the NFC hardware, and use it as a transceiver for NFC while not charging. I don't know if they even do things like that.
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I took a detailed look this evening and I can confirm that is the NFC coil, so the dream of Qi continues to elude us.

Bah, damn these chinese vendors and their inaccurate descriptions...

has anybody tried this? http://www.amazon.com/gp/product/B00MN3RR7Q?&path=/BLUBOON-Universal-Wireless-Micro-usb-Narrow-interface/dp/B00MN3RR7Q/ref=redir_mobile_desktop&ref_=redir_mobile_desktop&useRedirectOnSuccess=1&th=1

chapelfreak said:
has anybody tried this? http://www.amazon.com/gp/product/B00MN3RR7Q?&path=/BLUBOON-Universal-Wireless-Micro-usb-Narrow-interface/dp/B00MN3RR7Q/ref=redir_mobile_desktop&ref_=redir_mobile_desktop&useRedirectOnSuccess=1&th=1
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From my own experience it's a pretty sh*tt* thing, doesn't have the power efficiency it should.

Spazmatism said:
From my own experience it's a pretty sh*tt* thing, doesn't have the power efficiency it should.
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That sucks I like wireless since by the time I'm half way through the device life I need to replace the charge port. The joy of children lol

Qi adapter, Qi charger and corresponding case

Hello,
Buying the 8T in place of the Pixel 5 I knew I had two flaws to cover.
1. The Google Camera which is obviously done by one the many ports out there and
2. The wireless charging.
For the latter, is there a manufacturer who does a Qi adapter to be placed in a specific cover with a carved placing ? That would be it!
Also, I tried a 10W adapter bought on Amazon. It was indeed charging at a 10W "speed" but I couldn't let the phone on the wireless charger the whole night like I was doing with my iPhone Xs. It was buzzing and hot as f***. So I returned it. Maybe a 5W could be better ?
So a software switch could be the thing to disable it. Or a couple made from the adapter and the wireless charger ?
I think all available models are far from what is available when the charging coil is integrated inside the phone.
Any ideas ?

Does my question really interests no other 8T owner..?