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Did someone notice that on the inner side of the battery cover there are 2 spots which make contact with 2 pellets when closed.
What do you think is the purpose of that?
dunno know whats those 2 points. but it isn't the antenna.
Interesting. I hadn't noticed that before.
They do look like they are there for a reason, but what..?
Ankobarabanko said:
Did someone notice that on the inner side of the battery cover there are 2 spots which make contact with 2 pellets when closed.
What do you think is the purpose of that?
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i think is a charging circuit for the htc hd2 car kit back panel
kobibz said:
i think is a charging circuit for the htc hd2 car kit back panel
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I think it's probably the detectors for the car kit, so it knows when you've attached the back to the stand. I believe that there's an attachment that connects to the open connections near the battery & SIM for charging via the car kit, but I'm not 100% about that.
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
hey guys,
So i noticed 2 extra pins under the battery cover of my GN2 today! i looks like they are for wireless charging similar to what Samsung promised for the gs3. I don't really feel like waiting for the official wireless charging kit from Samsung so I'm going to attempt to make my own wireless charging back! I've seen videos like this before so i know it can be done! i have got the old inductive charger and back from my ancient palm pre so I'm going to give it a shot! just thought id spark up a bit of conversation about the topic and maybe learn a bit from some people who may already have done something similar!
I apologize in for the terrible grammar
thanks !
Isn't that for NFC? My original note had those and they matched up with the contact points on the battery cover and its nfc chip
imitenotbecrazy said:
Isn't that for NFC? My original note had those and they matched up with the contact points on the battery cover and its nfc chip
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As you can see in his pic the Note 2 has two sets of pins... One set (the upper pins) is for the NFC that lines up with the battery cover and the other set (next to the battery) is "most likely" for wireless charging because I did my own mod for the S3 and it works perfect but until someone does it we don't know for sure??
that's NFC
guitarz said:
that's NFC
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Just got it working! OMG this is sweet! haha tested it with some spare wires and it regonized that it was being charged wirelessly! now i just gotta make it look pretty and install it in the back panel of the phone! woo!
tomdroid3 said:
Just got it working! OMG this is sweet! haha tested it with some spare wires and it regonized that it was being charged wirelessly! now i just gotta make it look pretty and install it in the back panel of the phone! woo!
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You do realize that we need pictures on that.
imitenotbecrazy said:
Isn't that for NFC? My original note had those and they matched up with the contact points on the battery cover and its nfc chip
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Click to collapse
nope thats just the top pins! the bottom ones next to the battery are for wireless charging i just got it working too!
Vulpix said:
You do realize that we need pictures on that.
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hahaha well of course!! I'm documenting the whole procedure!
got some photos!!!
why didnt they advertise this anywhere
That is awesome....So how much would it cost if they were to sell a new back cover made for wireless charging?
cleankutazn said:
That is awesome....So how much would it cost if they were to sell a new back cover made for wireless charging?
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The whole mod cost me $18.00 on my S3 so that's how much it costs for everything... It's real simple too! I KNEW those bottom pins were for charging but some people just kept saying both sets of pins were for NFC which would be WRONG.... :highfive: Follow this thread and you can get all the stuff on Amazon... You will probably need some of the stronger magnets though which are another $10.00 for 100 of them on Ebay...
LINKY:http://forum.xda-developers.com/showthread.php?t=1877191 Thanks guys for getting to this!!
can anyone clarify:
which pin is + and -
what is the max current (at 5 volts?)
and other than getting the correct voltage, is there anything else that a wireless charging back-plate would need to do? (I am thinking of making a simple one with a LM7805 + a diode and a coil)
I'm waiting for the official Samsung one. I hope it does 2A wireless charging ! hehe.
slapshot136 said:
can anyone clarify:
which pin is + and -
what is the max current (at 5 volts?)
and other than getting the correct voltage, is there anything else that a wireless charging back-plate would need to do? (I am thinking of making a simple one with a LM7805 + a diode and a coil)
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Click to collapse
magnetic fields only induce current when the field changes(think transformer). It's AC not DC.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
How long does it take to fully charge the phone? Because the palm's wireless charging module's output current is far lower than the samsung one as far as i knows.
It's limited in the kernel to .5A, optimally 6.2 hours.
xartic12 said:
It's limited in the kernel to .5A, optimally 6.2 hours.
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What current? I thought current referred to electrons flowing down a wire. It is wire less.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
PaulF8080 said:
What current? I thought current referred to electrons flowing down a wire. It is wire less.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
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Mate. Wiki how a transformer works. Its basically 2 coils set next to each other. The coil in the dock has current flowing through it and this creates a magnetic field. This local magnetic field pushes the electrons around in the coil we have put in the back of our phones and tadaaa! Current. Electrmagnetism into Electromagnetic induction. So we dont want more than 0.5A in the case coil.
By the way see http://forum.xda-developers.com/showthread.php?t=1951493 for 2 common solutions to the mod (soldered and non-soldered) my non-soldered solution works a treat.
marc.tulley said:
Mate. Wiki how a transformer works. Its basically 2 coils set next to each other. The coil in the dock has current flowing through it and this creates a magnetic field. This local magnetic field pushes the electrons around in the coil we have put in the back of our phones and tadaaa! Current. Electrmagnetism into Electromagnetic induction. So we dont want more than 0.5A in the case coil.
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Dude, I am an electrical engineer. It's more complicated than that. Only changing magnetic fields generate electric fields that induce current in a wire. The current is AC. 0.5A makes no sense, to me.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
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.
Hi everybody.
I came here hoping to find sources for replacement batteries as both my XDA Execs are now unable to stay on for more than a few minutes. But from another thread I see that these batteries were last heard of back in 2019.
So, in an attempt to try and adapt currently available batteries to fit, I need to find out what the function of the two inner contacts on the XDA Exec are for.
The two outer ones are easily identifiable as +Ve and -Ve and -Ve, but I am stumped as to the inner ones. Is one for a thermistor? One for a charge sense?
Any help either regarding what these pins do or other workarounds gratefully received.
That's going to be a tricky one to source more batteries. Maybe get the dimensions of it, and look around for a similar (slightly smaller) one that can fit inside. You could solder wires between a smaller battery to the phone battery terminals perhaps.
I believe the outside pins are +ve and -ve. The inner ones are battery status indicator, and battery temp. not sure which is which o that particular device.
EDIT: This thread should help with which pin is which
Possible battery solution (fix)
Fellow universal users who suffer from battery problems, i know this issue is reccuring and is in many threads and forums now. However i am sorry to increase the talk in another thread. I just thought i would share my peice of advice. Attached...
forum.xda-developers.com
the_scotsman said:
Maybe get the dimensions of it, and look around for a similar (slightly smaller) one that can fit inside. You could solder wires between a smaller battery to the phone battery terminals perhaps.
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Click to collapse
Thanks, I have already started looking at other batteries, the XDA Exec is one of the largest so getting one of lesser dimensions is actually quite easy, but knowing the pinouts of both the Exec and the newer battery is going to be critical.
As far as soldering wires goes, I would be more inclined to try opening up the old battery and soldering new Lion or LiPo cells inside.
Thanks for the link to the other thread, it does indeed suggest the battery sense is adjacent to the -Ve, and therefore the Thermistor lead will be adjacent to the +ve.
No worries. Yea, that would be the best option, replacing cells inside. That's not for everyone though. A bit of skill is involved, which is why I didn't suggest it. But you obviously know enough in this area, so definitely go that way for sure
Did you get anywhere with this? I'd like to power up my Exec as well, but can't without a battery.