Wireless Charging Cover? - Nexus 4 Q&A, Help & Troubleshooting

Wireless Charging Cover? - Nexus 4 Q&A, Help & Troubleshooting

I know this may sound far fetched, but since this phone supports Wireless charging, is there a chance that something like a Powerskin extended battery cover that charges the Nexus wirelessly will be created? It would solve the battery issue for sure. Is the technology there? What do you guys think?
Sent from my LG-P999 using xda premium

Wait and see. The phone isn't even out yet. Give manufacturers a chance to make things for the phone...
Sent from my A510 using Tapatalk 2

c_86 said:
Wait and see. The phone isn't even out yet. Give manufacturers a chance to make things for the phone...
Sent from my A510 using Tapatalk 2
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Well, yeah. That's already a given. This is pure speculation. Nothing wrong with discussing possibilities.
Sent from my LG-P999 using xda premium

Bulletblitz27 said:
I know this may sound far fetched, but since this phone supports Wireless charging, is there a chance that something like a Powerskin extended battery cover that charges the Nexus wirelessly will be created? It would solve the battery issue for sure. Is the technology there? What do you guys think?
Sent from my LG-P999 using xda premium
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I highly doubt it, you would lose way too much in the induction transfer. Not a big deal for charging from mains power but would really be inefficient use of a battery pack.

Is the technology there? It's been here since the 1800's, nothing alien here, simple electromagnetics.
Its the inefficiencies that are the problem.

For the last couple of years they have fine tune the sweet spots. Hopefully by now they can amplified it to a higher magnetic field close to 100% of the wire cable first than go beyond that into higher voltage even stronger magnetic field further distant.

Capt.PP said:
For the last couple of years they have fine tune the sweet spots. Hopefully by now they can amplified it to a higher magnetic field close to 100% of the wire cable first than go beyond that into higher voltage even stronger magnetic field further distant.
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Part of the problem is that it's not selective, a current will be induced in any conductive material which can establish a current and expend energy. Expending energy is as simple as generating negligible amounts of heat, such as the antennae. It may also generate negligible increases in resistance in all of the components inside phone. But when you sum them all up, it's a noticeable loss of efficiency. It is possible, in an isolated system maintained at low enough temperatures, to achieve very efficient inductive transfer of energy, but the charger and coil is not isolated from the rest of the phone, and is not low temperature. Also, excepting theoretical constructs, an induction system is not perfectly conservative, namely your charger produces a magnet field everywhere, not just directed at the coil, so the energy stored in the magnetic field everywhere else is "lost." What I mean by perfectly conservative, is that when in the presence of a magnetic field the conducting loop will have an induced current, the induced current in turn creates a magnetic field of its own, if it were perfectly conservative, these two would magnetic fields would be closed, all field line emanating from the charger would terminate in the loop. Since the magnetic field from the charger exist first, the magnetic field from the coil will never completely equal it, a classic halving the halves to reach zero asymptote.

Related

[Q] Electric shock or tingling effect on legend when charging

iam experiencing a electric shock or tingling effect from the body of my htc legend when charging.it goes of when i pick it up.upon placing it on some surface the same effect returns.iam a new one here,is it a faulty handset.it is there only when charging. please help

I'm pretty sure its a bad handset, a connector for charging the battery is exposed and touching the aluminum casing.
Sent from my Legend using XDA App

Your power source are not properly grounded.

its nt there when charging from my laptop

Your laptop only charges at half the rate of the AC adapter, it probably still is putting current through the aluminum case, but you don't feel it.

marclh1992 said:
I'm pretty sure its a bad handset, a connector for charging the battery is exposed and touching the aluminum casing.
Sent from my Legend using XDA App
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how is that possible.im afraid

driftcat said:
its nt there when charging from my laptop
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Well, thats because I had similar experience. I used to connect my phone to my laptop with AC adaptor (faulty battery) till one day when it was a goner, I bought a new slim OEM version which do not come with ground (2pin vs 3pin with grounding on stock adapter). Ever since, I have had electric shock whenever Im connecting to my laptop.
I have gotten electric shock when using the stock charger as well. The old wiring at my in-laws house probably the cause for it. It was okay at home.

andrekua said:
Well, thats because I had similar experience. I used to connect my phone to my laptop with AC adaptor (faulty battery) till one day when it was a goner, I bought a new slim OEM version which do not come with ground (2pin vs 3pin with grounding on stock adapter). Ever since, I have had electric shock whenever Im connecting to my laptop.
I have gotten electric shock when using the stock charger as well. The old wiring at my in-laws house probably the cause for it. It was okay at home.
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Sent from my HTC Legend using XDA App
So u r saying my phone is at fault or the wiring

TL;DR, replace the handset.

Is anybody having the same fault.place the handset on a surface when plugged in to the power and rub Ur finger on to the metal part of Ur legend.
Members please see for urself.
Sent from my HTC Legend using XDA App

"iam experiencing a electric shock or tingling effect from the body of my htc legend when charging.it goes of when i pick it up.upon placing it on some surface the same effect returns.iam a new one here,is it a faulty handset.it is there only when charging. please help"
Are you sure you bought an HTC Legend? Are you sure it's not a defibrillator?

Your phone is just fine, don't worry. The effect your are feeling on your skin is caused by the charger and has nothing to to with the phone. There are some unqualified posts in this thread (e.g. problem with wiring, charging current) which should best be ignored.
To the effect itself. The charger isolates the mains power from the secondary power through the use of a transformer. Also our new small power supplies work with transformers, but operate them at a higher frequency (sometimes audible) after the main power has been rectified. But the power supplies represent also an electric capacity, and therefore the secondary output may charge up relative to ground. But this capacity is so small, that you may feel a voltage on your skin but there is no risk whatsoever. By the way, the back of the finger is very sensitive. Try to move it along metallic surfaces of other device (e.g. desk lamp) and you may fell the electric potential. The only way to completely avoid this is to use a grounded power supply, like some used to charge laptops.
Markus

yep. use groundod power supply. i have this thing when charging from my laptop and the laptop adapter is not properly grounded.
dont worry, its normal and negligible.

nethopper said:
Your phone is just fine, don't worry. The effect your are feeling on your skin is caused by the charger and has nothing to to with the phone. There are some unqualified posts in this thread (e.g. problem with wiring, charging current) which should best be ignored.
To the effect itself. The charger isolates the mains power from the secondary power through the use of a transformer. Also our new small power supplies work with transformers, but operate them at a higher frequency (sometimes audible) after the main power has been rectified. But the power supplies represent also an electric capacity, and therefore the secondary output may charge up relative to ground. But this capacity is so small, that you may feel a voltage on your skin but there is no risk whatsoever. By the way, the back of the finger is very sensitive. Try to move it along metallic surfaces of other device (e.g. desk lamp) and you may fell the electric potential. The only way to completely avoid this is to use a grounded power supply, like some used to charge laptops.
Markus
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i contacted htc support.the person over there asked me to bring the handset to the service center.r u saying i should not take it there,and avoid the whole thing

driftcat said:
i contacted htc support.the person over there asked me to bring the handset to the service center.r u saying i should not take it there,and avoid the whole thing
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Yes, keep your Legend and enjoy it...

If i had this problem i would most likely first try an other power adapter
if the problem is gone fine!!!
if not then i would send it to HTC service

I had the same problem for a while, changed the charger cable (Micro USB to USB-A bit) and it fixed it
Oh the comment about a difibrilator..........Nice!!
Mike

Galaxy Note Inductive Charging Mod

I modified my Galaxy Note to use inductive charging via a palm touchstone / patch.
Just a quick note. Not a whole lot to contribute here, because I largely followed the examples of the Qian Qi. That guy is awesome.
I don't think I voided a warranty, either. Only minimal teardown required (black plastic back, then the speaker section). Never came across a sticker I had to remove....
Useful links:
galaxy s inductive charging mod
evo 4g induction charging mod
galaxy note teardown video
galaxy note teardown pics
Notes:
- Buy a good soldering iron. Weller WESD51, set to 610 deg F, with 1/32" long conical tip, with lots of flux and lots of flux remover are the only reason I could do this. I can't stress enough the value of having good temperature control, knowledge of temperature, and so forth. I stumbled around with an "ordinary" soldering iron for a long time, and in hindsite, I can't believe I did so.
- Do not choke on the price. I already had a lot of soldering gear, and I bought $220 more. Spend the money. It's worth it.
- Watch the curious inventor youtube videos on soldering. This guy. Watch everything, several times. http://store.curiousinventor.com/
- You want 30 gauge wire. It's the only thing that just barely can be crammed in. I used the "Kynar" coated type. Buy at least 2 colors.
- as you look at the phone disassembled, with speaker on the bottom left, the +5 pin on the micro usb (MHL) port is the leftmost. I attached a wire to that, and a ground wire to the housing where the port was soldered.
- routed the wires under the speaker, then back, then into a VERY slight indentation into the battery compartment. used a blue "safe open" tool to help shape the wire / crimp ends. Once in the battery compartment, you're golden. Attach the inductive charging coil to the back of the samsung plastic back, add solder to the pads, and attach the wires.
- Attached is a picture with roughly how I routed wires. Red is +5V, Blue is ground. Be sure and double check if my recollection is right where the indentation is into the battery compartment. (that part is by memory).
- dont leave too much slack. it's really hard to get the samsung black pastic panel back on. Mine very slightly bulges.
- be careful where you put the charging sticky patch, because this phone is a little bit bigger than a palm pre. You have to consider if the phone can sit on the charger and "lock in" with the magnets. If you place it too high, it actually can't (in portrait)!
- Qian Qi had a really interesting point: most articles about how Li-ion batteries behave are wrong, and fully discharging the battery drastically reduces the number of cycles you have. So this is actually a very useful mod--whenever you don't use the phone, toss it on the charger.

Thanks for summing it up! Was actually thinking of doing this mod myself. Question: do you have a protective case on your Note? If so - what kind and how badly does it affect the magnetic properties?

No case. Especially because the note is so big, I think it would be unmanageable.
I took the samsung thin plastic back, and placed the Palm PRE (with charging coil still attached) on top of it, on the touchstone -- to figure out proper placement & mark with a pencil. I noticed a buzzing sound, coming from (I think) the induction coil on the palm pre back itself. I suspect if you use a case, this wont work well.
Also, the size/weight/placement of the galaxy note are such that the magnets are just barely strong enough to hold it. One time my phone was near, but off, the charger. I'm not sure if vibration from the phone did that, or my kids
In summary, I'm not sure how well it would work with a case. You might be able to research this on the net; among the 15 or 20 people that have bought a Pre, you might be able to find some info about the effect of a case on inductive charging.

tight squeeze?
im wanting to try this mod i have my touchstone on the way not thank you amazon but it seems like to me that the pad from the pre wouldnt fit under the cover of our phablet =/ could you post pics of the finished product and i think this is the only instance that i have seen someone attempt this with the note and i want to try it i love my note but would love it even more with inductive charging.

I am not the original author but I performed a different Touchstone mod and posted pics here:
http://forums.androidcentral.com/sa...1-galaxy-note-touchstone-mod-photo-heavy.html
Hope it helps!
-darren
Sent from my GT-N7000 using Tapatalk 2

Thank you!!!
Thank you so much for your post I have my materials on the way but I hadn't seen a detailed guide for the note other than this one and was worried I would have to solder directly to the usb pins which looked scary lol I did have two questions though would your mod work the same way for the at&t note? Specifically the points where you soldered to the phone and can wireless charging be performed through a case?

Hey, OP here. You may want to hold off just a bit. Mine is exhibiting some issues now. As in, it says "charging" but it doesn't do so wirelessly. The phone will stay "charging" but the battery % never goes up. (It was slow before, but would charge fully over a night).
Charging via USB still works.
It may be something simple; I'm not sure. But I need to crack it open and take a peek, and I haven't had time to do that yet because my phone is functional at the moment.
If nothing has conspicuously changed, there may be something about the design that isn't sustainable. Or maybe my solder joint halfway broke, or one of the wires got smashed enough so that it's partially broken...
I'll write back with my findings. Bug me if I don't

Thanks for the notice I was about to pull the trigger lol tbh I probably shouldn't attempt this I've never done a mod like this before and I'm not exactly a surgeon with a soldering iron lolvthatvbeing being said I'm going to attempt this on an old evo 4g I have before I do surgery on my baby lol plus I'm already familiar with the guts of an evo from screen repairs ill report back with my results
Sent from my SAMSUNG-SGH-I717 using xda premium

Success it took some doing but I got it I haven't done the mod on my note yet but I did it on my evo last night and it works its rough I haven't cleaned it up yet but I'll post the pics I got this mod from www.goodandevo.net
Sent from my SAMSUNG-SGH-I717 using xda premium

Thank you for this post.
Sent from my SAMSUNG-SGH-I717 using Tapatalk

No prob I just wanted to see if i could do it and if I can do it with little soldering experience I'm sure most could do it I haven't done this mod to my galaxy note though as there is way less room in its a far more complicated mod than the evo because you have to make room for wires in a device samsung made as thin as possible and the way you have to route the wires I feel like the solder joints would just break
Sent from my SAMSUNG-SGH-I717 using xda app-developers app

For those who want to try this out but still have warrantee just buy a backcover, a micro usb plug and assemble it according to the directions here.If you need the note just take out the usb plug and the back cover and you're good to go.... Or leave it there.....
For those who don't know what pins to use on the usb plug:
Pin: 1 is 5V+ (red)
Pin: 5 is GND (black)
Works like a charm.......
becosemsaida

Cool mod! Does it affect the stylus operation though?

pboesboes said:
Cool mod! Does it affect the stylus operation though?
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yes it affects the stylus sometimes it reacts with delay and sometimes it clicks although only hovers over it

pboesboes said:
Cool mod! Does it affect the stylus operation though?
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I was not a big stylus user; I can't stand the input lag. I didn't notice a difference, but I always considered the input speed unacceptable. Not sure why there would be any difference, anyway.
My big problem that I've never taken the time to address is that after some time, it's as though I can't pull enough current through the wires to charge. One day I need to crack this open & figure out why.

gr8 n interesting post
wonder how fast can a full charge be completed
regards

strategist99 said:
gr8 n interesting post
wonder how fast can a full charge be completed
regards
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It is slower than normal, but completed in a night. I still have not dismantled my phone to attempt to repair this, but I want to soon