Qi chargers

We take a look at three popular Qi wireless charging solutions and put them head to head in Jerry's bedroom

Qi (pronounced Chee, and is totally a word no matter what Words with Friends says) is a wireless standard developed in 2009 by the Wireless Power Consortium. The standard itself covers inductive power transfer over short distances -- up to four centimeters -- and uses a electromagnet embedded in a transmission pad to induce current in a coil on the back of the thing you're charging. In our case, that means a Nexus 4 smartphone.

With big-name device makers like Samsung, HTC, LG, Motorola and Nokia (as well as others) using the standard, it is slowly emerging as the winner in the obscure wireless charging war that goes on in cubicles all over the world. Long live Qi! On a serious note, it's an open standard with over 100 companies in Asia, Europe and North America cooperating to set a good standard that everyone can implement. That's good for business, and good for consumers in the long run. Of course, there will always be companies that buck the trend and take another path, but for now if you're going to spend your hard-earned money on a wireless charger that you should be able to use for the life of multiple devices, Qi charging is the way to go.

Because it's a standard, there are quite a few different companies making the base stations (a fancy term for the charging pad). I took a look at the three most popular and put them head to head to see which one I'd recommend. While I used a Nexus 4 for my tests, these chargers should work for any Qi-compatible phone with a flat back. Jump past the break and see who wins the Qi charger showdown.

We put the "Official" Nexus 4 charging orb, the LG WCP-300 wireless charger, and the Nokia DT-900 charging pad side by side on the nightstand, right next to where I lay my head every night. I charge my phone every night without fail, and use it as my alarm clock so I'm used to having it right there beside me every night. All three performed well enough, but we need to go deeper. Let's have a look at each, and see the pros and cons.

The Nexus 4 wireless charger

Nexus 4 wireless charger

It's a sexy little half sphere, and unlike the other two chargers I tried, raises the phone to an angle that makes it a bit easier to see. While all induction chargers have a very slight bit of magnetic attraction, the Nexus 4 charger uses a ring of sticky rubber to keep the phone in place. For some reason, a few people have trouble with this and their phone falls off in the middle of the night. I've been using this one since they first became available, with multiple phones and haven't had that issue. Like Stonehenge, this has become a mystery that will never be fully understood. Your mileage may vary, you have been warned, etc.

If your phone stays on the charger as designed, it works really well. I tried with a bare-ass naked phone, while using the official LG bumper, and my trusty purple TPU case. The phone charged just fine in all three scenarios.

Pros

  • Uses micro USB standard cable
  • Raises phone to a more visible angle
  • Is heavy enough to not move when fiddling with it in the dark
  • Easy to find
  • Says Nexus on the front #HOLOYOLO (I had to find a fifth pro somewhere)

Cons

  • Phones slide off for plenty of folks
  • It's bigger than it needs to be
  • The sticky rubber ring collects lint and dust
  • Only available online
  • Warranty process is difficult

The single killer feature of the Nexus 4 charger is its weight. Especially if you use a case. In the middle of the night, when the room is dark and your eyes haven't adjusted it won't slide around while you're trying to position your phone in the right spot. 

The con that kills the whole thing is that you run the risk of your phone not staying in place if you're unlucky. We have no idea why this happens to the people it happens to, but know going in that others have serious issues with this.

The LG WCP-300 wireless charger

LG WCP-300 wireless charger

Next up is the smallest of the lot, the LG WCP-300. About the same diameter as the Nexus 4 charger, but just a half-inch tall. This one has no issues with phones sliding off, and is an "official" LG accessory if that sort of thing is important to you. It's also very light, which means it slides around a good bit if your phone has a grippy TPU case on it. Positioning things just right can be a bit difficult at first, but that won't take very long to get used to. 

I was able to charge my Nexus 4 using the WCP-300 while naked, in a TPU case, and with the official bumper (see below) and it worked as described on the tin each time. 

Pros

  • Small and light, it's a perfect travel companion
  • Available from your local Verizon store so you can see it before you buy
  • Uses the micro USB standard for power connection
  • Dim amber power lamp lets you know it's plugged in
  • $20 cheaper than the Nexus charging orb

Cons

  • Very light and will move while positioning your phone if you use a TPU case
  • The dim amber power indicator lamp changes into a blinding green flashing beacon when charging your phone
  • A Nexus 4 with a bumper is very hard to position
  • Flat angle makes it difficult to use your phone as a bedside clock
  • THE BLINDING GREEN BLINKING LIGHT

The killer feature of the WPC-300 is the small size and portability. You could buy a spare to toss into your bag and have it available at a conference center or hotel desk. If the big draw of a Qi charger is being able to grab your phone and use it without a wire hanging out of it's tail, and you travel a lot, this is the one to buy.

On the other hand, the width (2.75-inches in diameter) makes it too wide to fit between the edges of a Nexus 4 bumper, but not wide enough to catch both sides equally. If you use a bumper-style case, pass on this one. And that light. I'm being serious -- it's like a discotheque in a dark bedroom. I could cover it with a bit of tape, or I could just use a charger that doesn't shoot green laser beams in my bedroom all night.

Nokia DT-900 wireless charger

Nokia DT-900 wireless charger

Because the Qi standard is, well, standard, it means chargers made from other companies will work just fine on your phone -- even evil companies that partner with Microsoft Nokia. The DT-900 uses the same exact Qi method to charge your Nexus 4 that any other Qi charger would use, making it a true universal accessory. 

The DT-900 itself is a bit bigger than the others I tried, with a 120mm by 60mm footprint. It's also very light like the LG WPC-300, meaning that you're going to be pushing it all over your desk or nightstand if you have a TPU case on your phone.  It is pretty stylish though, coming in five different colors (white, black, red, yellow and blue) to match your decor. 

It also worked as advertised with a naked phone, while wearing a TPU case, or with the Nexus 4 bumper installed. 

Pros

  • Super cheap. Find it at daily deals sites for $25 or less
  • Comes in colors other than black
  • Also available from Verizon, so you can see it before you buy it
  • Well constructed from premium-feeling materials, like everything else Nokia makes
  • It's the perfect size for a Nexus 4 wearing a bumper

Cons

  • Does not use the micro USB standard for power connection
  • Bigger footprint than the others
  • Moves when you try to position a phone with a TPU case
  • The "sweet spot" can be hard to find
  • The flat angle makes it difficult to use your phone as a nightstand clock

The one killer feature of the Nokia DT-900 is it's size and shape. If you have a Nexus 4 and use the official bumper, the DT-900 fits right inside of it, against the back of the phone. Just reach over, drop your phone in place using the bumper as a guide, and your phone will charge.

The major drawback is the non-standard power connection. You'll have to use the included cord and power block, and that means more junk in your travel bag or another cord to keep track of. While replacements are probably available, they would likely cost as much as the whole charger kit itself.

The winner

Nokia is the winner

As much as it kills me that the official Nexus 4 charging orb didn't get the nod here, I have to go with what works best for me. That's the Nokia DT-900. The way it nestles in the cavity created by the Nexus 4 bumper makes it a no-brainer to use, and when using a TPU case or nothing at all it still works fine. 

Your phone won't slip off, and there is no alien-invasion style blinking green light show to keep you up at night. I wish it used a normal USB cable for power, but then again I'm not planning on spending too many nights at a hotel this year.

What really puts it over the top is the price. As mentioned, I picked this one up for $24 at Daily Steals, making it a full $15 cheaper than the LG WPC-300 and a whopping $35 cheaper than the official Nexus accessory. Stop by your local Verizon store to play with the floor model and see for yourself (but be sure to buy it online and save $25). 

Any of these chargers (or the many other Qi-powered alternatives you'll find on the Internet) will charge your Nexus 4 without too many issues. There is no big secret -- drop your phone on the right spot and it charges until it's full or you lift it off. But the little things matter, and I've got to hand this one to the Nokia.

 
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Qi wireless charger showdown

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Nokia is not evil! Don't you remember when the Lumia 900 users couldn't connect to wireless networks. Nokia released a fix, phones could be exchanged and everyone received 50 dollars off the purchase. Microsoft isn't evil too. On the other hand, you can always be Scroogled.

Atleast it's better than Microsoft supporting terrorism by giving terrorists access to maps over US bases, and Microsoft employees personally looking through your pictures.

Not to mention the fact that they're are just as guilty as "scroogling" as Google is, they are just good at words :)

When did they support terrorism? The time they banned someone for putting naked pictures in his skydrive must have been because he posted them publicly.
Google checks all your email, picture and web searches in order to give you the "best" ads for you. And the search results are leveled by how much you paid.

When they forgot to censor US assets in their satellite shots.

The porn pictures were not public, you will also see that they have admitted this type of behaviour in another case, obviously if they're scanning them, they need someone to verify them, so literally someone is personally looking at your pictures.

Due to how computing works, Microsoft checks "all your email, picture and web searches" too, but like Google, they don't have anyone personally looking through them, well except for your pictures.

This is exactly why the "scroogled" nonsense works, they make people assume the worst, when the fact is that Microsoft is no less guilty of the data snooping than Google is.

The terrorist case is domeone being fired as he clearly didnt do his job. All tour data is deleted after six months completely from their servers while Google stores it for years and sella them to ANYONE. Even though, Microsoft is the Devil compared to Nokia.

Aight, Nokia is ok. Microsoft sent Elop, MS minion, to put a hypno-spell on Nokia's board. After so Elop was able to convince Nokia's board they should install WP instead of android.
And now Prince Larry must kill the Seattle beast and take the horn of the beast to Far Faraway, Finland. Knight Schmidt tried but he couldn't beat the beast. Only Price Larry can beat the beast and break Elop's evil spell.

Personally, I'd say that WCP-300 should be out on top, easily. I've not had any issues with mine and I love it. It's cheaper than the Nokia charger, and smaller and lighter too. It charges as an insane speed, and it fits into my LG Smart Fit 2 car holder for induction charging in the car on long trips and days out. Can't beat the WCP-300.

It's not cheaper it's about the same price but Nokia's charger goes on sale very often and was even handed free to Lumia 920 users in AT&T. I don't like it being smaller because if I don't put my phone correctly it falls onto one side.

£42 for the Nokia DT-900 or £28 for the LG WCP-300. I think it's clear which is actually cheaper. Oh right. I have no problem at all with my Nexus 4 sitting on the charger. I can just chuck it on the middle of the charger with no fiddly positioning and it always charges.

All these chargers are outrageously, and beyond ridiculously priced. Electric toothbrushes can charge wirelessly, and they only cost $20!!!

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Expensive, they might seem. But comparing them with electric toothbrushes is a little harsh. The fundamentals of the technology might be the same, but the implementation for smartphones has to be top notch. In charging, it's my smartphone usage at stake, while with the toothbrush, it's just my morning hygiene, I can manage brushing my teeth without electricity.

If the execution is below par, you and I will get sub-standard products that are more pain than convenience. And the biggest driver in wireless charging today is convenience. Ask those who have a wireless charger and most will tell you it's not only worth it, but also that they'll never go back to wired charging.

That said, the price will come down and convenience and usage features will increase in the coming times, after all these are consumer electronics products.

That Nokia charger does NOT work with all Nexus 4 phones. I have an early batch of the phone (forget how to tell...Google it) and it will not charge.

I was surprised the Nokia charger worked as well. Something else besides little feet nubs must have changed in the newer Nexus 4s.

I have several new batch Nexus phones and Nokia DT-900s and DT-901s (the pillow).
None has ever worked right for me. None.

Always thought it to be a current issues. Nokia chargers supply 750mA. Nexus stock (Wired) microUSB charger supplies 1.2A I think (higher than the usual 1A).

Lumias work flawlessly with DT-900/910. I have never seen a Nexus actually charge with it.

Just to be clear, it will pretend to charge, it just...won't.
Frequent disconnections are frequent

I have the Nokia charger and it works with my S3 without issue, will not work with my friends Nexus 4 nor will it work with my brother's brand new white N4

No disrespect intended but did you use the Nokia charger to charge up the Nexus from empty to 100% (and if so, how long did it take?) or did you just test it for a short duration to see if its compatible?

I ask because it does indeed pretend to charge, it just doesn't actually charge and disconnects and connects in an endless loop cycle

My wife and I have new white N4's and the Nokia wireless charger. It charges our phones, but frequently disconnects and the charge is very slow. We've given up on using it. I certainly wouldn't recommend it to an N4 owner, and I'm surprised this article picked it as the winner without even mentioning the issues that most owners seem to have.

"I keep hearing that."

And yet you recommended it without even mentioning in your article that it doesn't work for many (most?) N4 owners?

That seems a bit irresponsible.

It's in the bootloader. reviasion then a number. 12 was the first one with the nubs, 13 works with the Nokia Qi charger. Unfortunatly for me I have REV 12 which means no NOkia for me. Tried it, didn't work, returned. My first and last purchase at the ATT store for reasons outside the charger.

You have HW VERSION - rev_12? I'm kinda surprised coz even folks who've bought N4's in June have rev_11. I too have rev_11 and it has issues with the DT900. And the issue is because rev_11 and older are not Qi certified. They do have the coil and electronics based on the Qi standard, but they fell short somewhere.

All Qi chargers will likely find issue with the N4 and keep cycling between charging and ready state.
You can check on the WPC site that rev_12 is Qi certified:
www,wirelesspowerconsortium,com/products/details/210/mobile-phone

If you do have rev_12 and it does not work with the DT900, you should absolutely write to Google, LG and WPC. All Qi certified phones HAVE to work with all Qi chargers, otherwise their certification does not hold.

Read up on Qi charging at my blog at qitah,com/blog
We're making a wireless charger too, focussing on general smartphone usage problems. It's called Qitah (say Cheetah). You can tell us yours at our facebook page, search for projectQitah

You shouldn't have to stick tape on it. The designers should have applied just a tincture of common sense.

Yes, you are correct. However, just because they didn't doesn't mean you shouldn't take steps on your own.

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Just so you know if any of you have the issue with the nexus 4 falling off the charging orb, Google will gladly exchange it for a new one no questions asked even after the 15 days of purchase

Hope that's true, because as per my lengthy posting on Google+ (not sure how to share a link to it), the glass rear of my otherwise nice Nexus 4 shattered spontaneously the other day, and despite it receiving NO impact (it was in my pocket, and has never been dropped or knocked), and only being a few months old, Google have refused to fix or exchange it, sending me to LG who I did not even buy it off. Google's way of dealing with people issues is hopeless. That is what happens when geeky youth run a company prior to a more compassionate maturity. #lordoftheflies

Seriously? Where do I go to get an exchange? Obviously it's a known problem if they're doing exchanges!

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Very relevant point: I'm not from USA, so that changes everything.

Google never replies/responds/provides any support whatsoever. No available channels, No available phone numbers. LG is slightly better. The only other company that gets away with little to no support is Blackberry (Which uses carriers to provide support).

I am very very surprised Nokia DT-900 came out top. I used to Lumia 820 and now I am using a Nexus 4. I thought I could use my DT-900 with my N4. Yes, it charges but at an output of 750mA it takes almost twice as long to charge. I ended up selling off mine. Metrans Qi charger should be in the competition. I have one now and it works perfect.

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how many mA are you getting out of the Metrans Qi?
(I wish all Qi reviews would post how much power is actually provided. It's like car reviews that leave out gas mileage.

Nice article, but you don't mention which of these chargers allow trickle charging. I know the Nexus 4 Orb does, but I don't know about the others. That's important buying information IMO.

On top of which, they don't mention the power each provides.
Both LG chargers are 1A output, so they will charge faster than the Nokia which is rated at 750mA.

Glad someone mentioned this. I've seen measured charging current as high as ~650mA on my Nexus 4 on the Nexus charger. The AC adapter for the orb is about 1800mA output.

It might seem handy to use another Qi charger, but if it only provides ~300mA of charging current on the phone, it will take longer to charge.

Why is this a BIG DETRACTOR? The idea of a wireless charger, to me, isn't to charge a phone overnight by the bedside, but to charge and top off a phone while picking it up frequently, say for use, or going to a meeting (anyone else use Google Authenticator for OTPs at work?), or out to lunch. The wireless charger's biggest appeal is that you don't have to dock, or plug in, your phone frequently throughout the day, wearing out the connector.

I now have three Nexus chargers, one for work, one in the living room, and (yes) one for bedside. I hardly ever plug it in.

So effective charging current is an important feature. I'm surprised this isn't part of the Qi standard. (Or is it?)

Effective charging current IS a feature in Qi charging. The approach is that the charger has to deliver 5W of wireless power to the phone. Now the phone's has to have a Qi receiver coil and associated circuitry to convert these 5W of power to a voltage and current level suitable for it's battery.

Your Nexus4's wall charger is rated at 5V and 1.2Amps. That's 6Watts, but wall chargers typically have efficiencies of 70-80%, so power delivered to phone is a bit less than 5W. What all this means is that a Qi charger, should it work well with an N4, will charge the phone at similar or faster speeds.

No one mentioned the WCP-700 I got right after the N4 came out (from Verizon store and on sale at the time!) and it outputs 1 amp aka 1000 mA!!! It's a nice flat rectangular pad the fits with ANY case. I'll say it again 1A!!!

notfaded,
Interestingly, it's not about the amps! Any Qi charger by rule has to deliver a short range magnetic field carrying 5W of power. It's your phone's Qi receiver coil and circuitry that converts this magnetic field into usable current and voltage.

If your phone converts it to 5Volts, by default the current it draws will be 5W/5V = 1Amp = 1000mA.

This is true for the WCP300, WCP400, WCP700, Nokia DT900, Samsung Qi charger - any Qi charger out there, and it's 5Watts, else it's not Qi.
Note that Nokia DT900 takes a 12V input from the wall charger and has a 3coil design, whereas the WCP's from LG take 5V input and has a single coil design.
Yet, both put out 5Watts! In a three coil design, you get freedom from alignment. The coil that is best aligned with the phone's receiver coil is chosen automatically to transfer power. The other two coils remain in standby.

We're making a wireless charger called Qitah (say Cheetah). Tell us your smartphone issues on our facebook wall, search for projectQitah
Know more about Qi charging at our blog qitah,com/blog

Cheers :)

projectQitah you seem to know your stuff when it comes to this wireless charging stuff, do you know how efficient these Qi chargers are compared to run of the mill cable based chargers?

I've been thinking of getting one for my Nexus 4, but I don't want to use something that draws a lot of power but only uses a portion of it. If I'm going to get one of those LG Qi pads then Ideally I would like it to be not less efficient than my standard USB charger.

Can you shed any light on this mate? Thanks! :)

So why can't these manufacturers just pick one standard? Lg, Samsung and other manufacturers have already said there switching to a different wireless standard.

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They did: Qi

Then the WPC consortium (Qi people) became slow, bureaucratic and generally not innovative enough.

Powermat alliance is meh. Forget it.

A4WP, beyond the awkward name (That they admit themselves) is much more forward looking with regards to magnetic resonance and "true" wireless charging (i.e distant charging). Would expect this to be the future.

Most companies are NOT exclusively aligned but have their fingers in multiple pies. They are playing the field still and experimenting.

At this nascent stage, it is IMPORTANT for there to be no standards as they will kill innovation. Imagine you picked a not-so-good tech as standard, where would that leave you?

Standards are ONLY useeful to define the lowest common denominator and base functionality. Not to define top line or innovative things

Not really no. Your experience may vary from 'can't charge at all' to 'charge intermittently' to 'pretends to charge' to 'charges fine but slowly'

Nokia - well no. But they do have their own prince of darkness, if that helps.

Microsoft - not ACTUALLY evil? . . . Not totally sure on that one mate. I have dealt with them and they ARE quite seriously "as weird as a box of frogs". More like Vogons, but with worse poetry.

Slightly disappointed about the nexus charger results, but with the better option being the cheapest, it works out well for me.

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For the two charges using USB, would a large power block (my example is the Blackberry Playbook charger) have any effect on charge time?

You should use an AC adapter that is properly rated for a charger, like the one it's provided with. A charger won't take "more current" from a more powerful adapter than it's designed to.

But if you substitute a weaker adapter e.g. a 1000mA travel charger for the Nexus charger that requires 1800mA, you will get not only slower charging, but improper or interrupted charging (I tried as an experiment).

Safest bet: use the adapter the charger came with.

Great. Helpful as ever Jerry.

I do wonder what you actually do if a Google play product turns out to be duff after 6 months. That does worry me when I order from them.

I feel dumb about this bit does this work with any phone or do you have to have a special back or battery?

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Only 2 options, and its not a dumb question :)

1- Either your phone has Wireless charging built-in (the review specifically caters to those phones following the Qi standard)
or
2- You get one of the back packs if your phone does not support wireless charging out of the box.

What phone do you use?

Comparing retail prices to a special "daily deal" you got is pretty ridiculous in a review.

Did you check craigslist? You might have found a qi charger for $5 someone was selling and that could been your pick as the best.

I'm surprised with the DT900 winning with a Nexus 4, I have one and while it works somewhat. I often wake up to my phone charged to about 85% or weird periods where despite having the charging light on for hours it will gain about 2%. But combined with a 30 minute drive to work I have it fully charged every day, so I've completely replaced wired charging in my house.

FYI: I put a screen protector on the back of my Nexus 4, and that stopped the slippage problem on the official charger. However, the other issue is that it only charges when it wants to. Usually it takes 3-4 attempts of putting it on before it starts charging, making it more cumbersome than a USB dock. It also rarely, if ever, charges if the battery is at 90% or higher, no matter how many times, and in how many different positions I try and put it on. It also usually stops charging at around 96-97%.

In short, this charger is an epic fail... at least for me :P

Thanks Jerry... I've been planning to buy one for a while. This totally helped seal the deal, and gave me a LOT of information about each of these. Thanks again.

In my experience of about a dozen Nexus and Nokia DT chargers.
They do not work together seamlessly at all.
They might as well be adhering to different standards

I don't understand, because I try to charge my nexus 4 on my Nokia PowerUp and charging plate, and it indicates it's charging, then doesn't, indicates it's charging, then doesn't, and so forth. I don't know why.

And we really need a "email me when someone replies to your comment" button, like all the other mobile nations website.

Nexus 4's are not Qi (say chee) certified devices, except for those that are hardware version 12. This version has not shown up anywhere to the best of my knowledge. Mine is hw version 11. To check yours, hold volume down key while powering up.
Still, N4's have a coil and electronics built on Qi technology, they're just not perfect. So the N4 works with the orb because the orb was made for it. It's a different matter that the orb sucks coz the phone will slip off of it.

Nokia Dt900 is Qi certified and thus will work with any other Qi certified device. With the N4, it cycles between charging and s ready state because it finds issue with the N4.

Get to know more about Qi charging at my blog : qitah,com/blog
We're making a Qi charger called Qitah(say Cheetah) keeping in mind user issues. Tell us yours at Facebook,com/projectqitah

And we so want emails for replies!!

I too had issues with my son's N4 with a Nokia DT from Verizon, it had a hard time charging it even though it said it was. 2 days straight he woke up with like 20% on phone, replaced it with LG one and it's way better. Yes the bumper doesn't make it easy to place it on charger, but my 13 year old does a great job of finding the spot. I now have one for my DNA, bought it before I even got DNA.

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And like I've mentioned in other topics, with the Nokia you need to have it parallel with it while the LG you can place it 360° around and it'll charge.

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I'm surprised AC reviewed the Nokia DT-900 when it is already so similar to the LG WCP-300. The only real difference is the size, it seems.

I got a Nokia DT-910 for my DNA, and I love it. It's basically the DT-900 propped up at an angle so that I can still see/use my phone while it's charging. The only downside is that I cannot have it charge wirelessly while in landscape orientation.

Well, technically I got it to do that by setting it on top of an eraser to boost the back of the phone up to the middle of the pad where the charging was achieved. But the point is that it wasn't designed to be able to do that.

I own a pair of LG WCP-300s and charge both the Nexus 4 and Lumia 920 on them. The 920 is way more forgiving in terms of how you place the device, whereas the Nexus 4 is quite the opposite, even a cm off from optimal position and it won't charge or keep stopping/starting.

The green light...what were they thinking :/ I've just faced it towards a wall slightly so it doesn't keep us up all night long.

If it weren't for the price, I'd have gone down the Nokia DT route, although off-late I've seen the DT-900 show up for 23$ (bulk pricing) or 22$ (refurb), which is a bargain.

And what about the Nokia DT-910? Smaller but upright footprint perfect for nightstand and other viewing, sufficient weight with rubber base, phone will not slide off with a sculpted rubber cradle, unobtrusive charging LED, no fussing with coil positioning, and an oddly placedNFC tag in base. It might be more expensive and harder to acquire (I snagged a used one off Amazon), and as stated above no horizontal positioning, but it's a fantastic complement for my Droid DNA once I had a ROM that removed the aggravating wireless charging alert that HTC implemented.

I didn't see this mentioned, but from my recollection, the LG has the highest output of any of the wireless chargers in its price range (20-30$). It was an important considering as I've always heard these types of chargers taking extra long to charge your phone as they're not overly powerful.

I, too, was hoping for a little bit more of the technical details. I would like to know if these are going to take all night to charge my phone.

Basis my experience with a Lumia 920 and Nexus 4, no, it won't take all night to charge on a LG WCP-300, in fact you'd barely notice the difference between this charger and a wired one. YMMV.

I still have my palm touchstone affixed to my car dash. Worked flawlessly then even to the point if the magnets being strong enough that the pre never slid off even when breaking or rounding sharp corners.

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I am currently using the Palm touchstone car mount and it has been working great. I have done the touchstone hack to both the GS3 and GS4. Both work great and with booster magnets on the touchstone (just drop them on - they are self sticking) the phones hold really well.

I have also purchased one of the GS4 Qi receiver packs from Amazon, and tested it with a third party Qi transmitter not reviewed - (GMYLE New Generation Black Wireless Charging Pad Mat Qi charger) also from Amazon. The setup works well. The sweet spot for that mat is centered perfectly for the GS4 and the Qi pack.

For both setups (Qi and Touchstone), it appears that the GS4 is charging at 640mA - according to the "Galaxy Charging Current" app.

That said, the touchstone setup truly blows away Qi. 1) It just works. 2) there is that comforting thunk when the phone plops on the charger. No futzing whatsoever.

If you have ever used a Palm Pre/Pixie/Veer and the touchstone, you know what I mean.

I think current phones don't use the magnets because phones today have compasses that would be affected by the magnets. Palm's line didn't have compasses.

Great write-up, Jerry. Even if it was a little creepy having a (dark) glimpse into your bedroom.

A couple questions, however:
1. Why the exclusion of the Samsung charger? Isn't it Qi? Isn't it universal-ish like the others?
2. And a strange question: What if the place you want to put the phone is already slanted? You know, like one of those charging station desk accessories at Target or something. Will the magnetic stickiness of the Nokia or LG one prevent the phone from sliding off?

Firstly, not all Qi chargers use magnets. In fact it's rare now. The WPC is discouraging the use of magnets by manufacturers.
The Google Orb uses a magnet.
Nokia DT900, LG WCP400 does not, Samsung's Qi pad does not.
Where Nokia scores is by using 3 coils in it's charger. That means you don't have to align your phone
1. Samsung's is a Qi based charger, but from my info, it is a single coil design
2. If you're putting the charger on an already slanted surface, all these models would fail because there's nothing to prevent the phone from slipping.

If you'd like to know more about Qi charging, go to my blog at www.qitah.com/blog
Qitah (say Cheetah) is a wireless charger under development. Let us know what you'd like it to do at facebook.com/projectqitah

Cheers!

I have a Droid DNA, and love having wireless charging. I have the DT-910 for bedside and it works great. Always wake up with the phone at 100%. I have a DT-900 for work and at home (living room). Same experience. Drop the phone on and it charges.

Owl is working on a car charger but depending on your phone model, it may or may not work well.

Are you kidding me? I totally fell for your worthless write up and bought a Nokia DT-900 Qi charge. SHAME ON ME! I should have done more research. This POC will not reliably charge a Nexus 4 if its life depended on it. I started to read the comments from your write up but go bored by all the worthless crap lucaslumia started. Great help lucaslumia. You contrtibuted NOTHING. If I had read past your BS I would have know better.

C'mon Jerry, a lot of people read your stuff and count on you to help them make informed decisions. Myself included, and I bought a DT-900 on the strength of your recommendation, only to find out my rev 11 N4 won't charge.

How about a meaningful follow-up? How about telling us the H/W rev of the phone that worked so well for you? Or how about editing your post to include a mention that many people have problems?

I got the Orb as soon as it was available, and sorry to say, my naked N4 slips off all the time. I've not gone so far as to change the orientation of the rubber ring on the bottom, or put a screen protector on the back, but I've done everything else - wipe with damp cloth, used a sticky roller, etc. So I got the TYLT VU, which is a great holder that positions the phone nicely. I thought it would be better than the Orb because there would be no slipping and I could view the phone at a nice angle.

However, I still have problems with both of these chargers. On the TYLT, my phone will constantly wake up because for some reason it stops charging, and then starts up again. Blinding phone light in the middle of the night is no fun. The other problem is that when I run Dashclock on Daydream to use my phone as a clock/alarm, the phone barely charges, and in the case of the TYLT, it actually loses the charge. I'm thinking of selling the TYLT. I really don't think the waking problem is the charger's fault, but I'm tired of fiddling with my phone, adding diagnostics apps, and constantly monitoring it to see what's going on at any given moment.

I also use the TYLT and I have to say I really like it. I have an LG G2 which goes on the charger at night with no case. I do not have the start/stop charging problem.

Pros:: great angle allows you to use your phone as a clock or watch videos while charging if you want.
the light is tucked under so you can see it but it is not blinding
never had any problem getting the phone lined up. I have never had to re-align it (as opposed to the LG charger which is not difficult to align, but I do occasionally have to reposition on the LG Qi charger).

Cons: Too expensive
no micro USB,

thought I would add my 2 cents.

I purchased the Nokia QI Charger, using it for my Optimus G Pro. It works very well and especially at the great price. My con as well is it uses a proprietary plug, however this is not too much of a big deal for me, since the charger stays by my side on my night stand. I could not imagine paying more than $25 for any of these chargers, and I am glad the G Pro comes with the QI back cover stock out of the box. Even with the TPU case, I can place my G Pro in almost any position, barely touching and it will charge just fine. I would suggest everyone to buy this charger for overnight charging only, since it only charges at .7 Amps, where as most new phones require 1.7+ Amps. Overall definitely a must by.

I am running CM-10.1.2 on my Nexus 4. With this charger, the phone never seems to get much above 80%. I can still see that it's charging. Any ideas? If this is charging at only .7 amps, this may be the problem.