Related
yes, only by short circuiting the x and the 4 pins start a FAST recharging on regular USB cable.!! i recharged my athena, in my car, with a modified USB cable 20% in 50 minutes! before modifying the cable all i was able to achieve was 10% in 3 hours!
see also :
http://forum.xda-developers.com/showthread.php?t=387531
http://forum.xda-developers.com/showthread.php?t=387531
http://pinouts.ru/PDA/pda_miniusb_pinout.shtml
here is a short "how to" with pics at: http://picasaweb.google.com/whvoltage/USBCableMod. i took no responsibility for any damages caused by my tutorial. i did it and it worked.
1. peel with a knife (watch yr fingers!) the molded plastic.
2. remove the metal casing with a small screwdriver. start from the part that holds the cable after this gently release the 2 parts parts of the metal casing.
3. it's time to release the contacts.
4. clean the contacts with alcohol (don't waste good wisky) for a good and fast welding.
5. the delicate part is to create the short. be fast, underneath the pins there is a relatively thin layer of plastic.
6. done.
7. rebuild the casing.
no syncing after this modification. for syincing you''l have to use an unmodified cable.
now for the real funny staff: after finishing i realized that i did it "the hard way".
why? i did it on the small and very delicate end of the cable. i am sure it is much easier to do it on bigger, wider end. i am an electrical engineer and i once upon a time i learned that a cable shortened at one end will be shortened at the other end also. i laugh at my self for about 5 minutes......
next step: an universal cable that is charging and syncing and works with my athena AND with my trinity. how? i'll add a toggle switch (this time at the wider end, hehehe).
to be continued....
Great mod...
though I actually use a diddy usb car charger made for a motorola that has a quick charge system built in. This does the trick for me with out the risk of me blowing up my Ameo and car as I am crap at soldering!
Plus 80nok here in Norway is a bargin (about 15usd)
Arctic Matt said:
though I actually use a diddy usb car charger made for a motorola that has a quick charge system built in. This does the trick for me with out the risk of me blowing up my Ameo and car as I am crap at soldering!
Plus 80nok here in Norway is a bargin (about 15usd)
Click to expand...
Click to collapse
i also tried in my car a Motorola cable. no success.....
yes, there are special cables (found one that actually has 2 heads, one sync one for charging) but they are not available in my country.
athena did not "made waves" here....too big to carry...
i bought one, second hand only for my car. when i walk i carry a trinity.
the athena will be mounted in my car (beat the hell of all the navigation/bluetooth devices sold for cars).
and btw, my athena was charged from 5% to 10% in just 10 minutes!
Oh I!
Forgot to mention that the connection was very loose from the Motorola charger and after a small sqeeze or two from some pliers it fitted great. When loose the charger worked on rare occasions. After the squeeze it charges all the time and bloody quick too with no visible side effects.
HTC wall outlet charger
I have made measurements in my wall outlet charger which came with HTC Advantage X7501 and can confirm that there is short circuit between pin X and pin 4 (GND). So, looks like Advantage check this for FAST charging.
My soultion to the charging issue is I use an inverter and a wall charger from my kaiser and this works fairly well. before that the car charging kit would not even maintain the charge if gps was running.
Cheers
BR
Hi I bought what I believe to be a Wopad V7+ ..
The ac/dc power supply broke and it's tough to find a compatible plug (very tiny) ...I'm waiting for a hopefully compatible charger to be shipped...
The tablet is officially not rechargeable/powerable via the micro-usb but I wondered if someone could point me to a (noob-friendly) way/HACK to make it rechargeable or at least powerable via USB ?
I can't post external links but I know it's powered by 5v 2A and you can find the pictures/information at dealextreme. sku104916 or at wopadusa.com store It seems to be AKA: HAIPAD M8 /Zixoon V78c / McPad V7+ / MOMO 1000 (BUT Resistive touchscreen)
You can see the internal components on a youtube video v=8SiLWpLCfus
there is pics of internal on twitpicDOTcom (/photos /bjlandsberger)
OR THERE : chinadigitalcommDOT com (/ haipad-m8-vimicro-vc882-t10830-10 DOT html)
or http twitpic DOT com ( /6i0ouo/full )
These pics/video aren't mine as I didn't DARE to open mine.
I apologize if my english makes your eyes bleed. Any help is welcome
USB can't provide 2A of current you'll have to buy a new charger
Sent from my X10i using XDA App
nugget1993 said:
USB can't provide 2A of current you'll have to buy a new charger
Sent from my X10i using XDA App
Click to expand...
Click to collapse
that shouldn't matter. It would still charge, just much slower. Just cut open the charging wire and a USB wire. Find which wire is positive and negative on your charging wire. connect the red usb wire to the positive wire in the charging cable. Connect the black wire to the negative wire. Insulate. It should charge.
Note- if you switch the wires, you can permanently screw up your tablet.
This. Just be extra sure not to cross up your wires, I did this once with a USB hub and fried the board. It literally left melted plastic on my desk.
Epic_VS said:
that shouldn't matter. It would still charge, just much slower. Just cut open the charging wire and a USB wire. Find which wire is positive and negative on your charging wire. connect the red usb wire to the positive wire in the charging cable. Connect the black wire to the negative wire. Insulate. It should charge.
Note- if you switch the wires, you can permanently screw up your tablet.
Click to expand...
Click to collapse
It's a 3.7v battery which means it can charge at 5V. Looks dooable with a .5A Regulator and a 1ohm resistor... I'd try this and if it fails, then you've tried and failed
So it is a 3.7 but the problem is that is a raw battery pack as in no protection, no regulation, no charging circuit. If you want to sit there and babysit you could attempt to put 5.0V on the power lines and that might work. I would say it is dangerous to do so.
Epic_VS said:
Connect the black wire to the negative wire. Insulate. It should charge.
Note- if you switch the wires, you can permanently screw up your tablet.
Click to expand...
Click to collapse
No risk of fire/explosion ? What would be the best way to insulate ? heat Shrink tube + tape ?
I planned using a ACDC inwall 110 to USB 5v 1A out adapter, would it be risky ?
Will I have to babysit it to prevent a fire ???
Errrr...
.5A Regulator and a 1ohm resistor.. Maybe with a graph and picture I could figure how to do it ... I don't know anything about electronic/tension ohm's law.. I don't want the battery to explode and rip my head apart.
No matter, go for it, it will be OK, all li-ion batt used in mobile device have a small protection circuit in it(unless specified) ur batt too have it, use heat shrink tube, a 100-300ma USB current can't make it explode.
Sent from my HTC HD2 using XDA App
moto xoom...
Hmm....is this possible to do? If so I would like to try it on my Xoom, the little pin charger is annoying I bent the hell out of it. Micro USB would be stronger . All pros no cons.
For the most part putting 5V on a 3.7V load is not overly dangerous. In order for you to charge a battery, the voltage being applied to the battery has to be greater than the potential storage of the battery. In this case, greater than 3.7V. My blackberry charger is 5V regulated output.
We use 3A power supplies all the time to charge 12V batteries. The voltage we set it to is 14V. These power supplies aren't smart. They just dump current. The higher the voltage pf the battery gets, the lower the current gets as it starts to resist the current that is coming into it. Even your cars alternator puts out 14V and yet the car battery is 12V. For the most part, the actual voltage of batteries is 10%-15% higher than what it is rated at as well. So your 3.7V battery is more like 4.05V - 4.20V when it has a full charge.
But, this is not going to give much big problems. As the current is only 10-20% of the original batt amp, so it will be ok, but for high current ratings the voltage must not be more than 1-1.5 v higher than the batt voltage.
More over the ditachable batt of most phones /pda have inbuilt i-v regulator inside the batt. It will prevent overcharging and deep discharging on most cases.
Sent from my HTC HD2 using xda premium
WOW thanks a lot for the informations, if my RMA doesn't go as I want I'll probably settle to try this and keep this post updated.
Thanks a lot. XDA is great.
My two other (unanswered) threads:
http://forum.xda-developers.com/showthread.php?t=1477288
http://forum.xda-developers.com/showthread.php?t=1480517
Guys, I've looked around some, but can't find the information I need for this project. I've come into posession of a friend's Nexus 7 8GB that's cracked, as I have two projects in mind for it. The first is making my own external battery pack with the battery from the tablet.
I know the battery is rated for 3.7V at 4325mAh. A standard USB input is powered with 4.5-5.5V. I'm somewhat electrically knowledgeable, but I'm stumped on how to make sure I don't fry my phone or my Nexus 7 by plugging this battery into the USB port. My other dilemma is charging the battery back up, I'm assuming that this will take a small circuit to do.
Any ideas?
Thanks,
Austin
atminside said:
Guys, I've looked around some, but can't find the information I need for this project. I've come into posession of a friend's Nexus 7 8GB that's cracked, as I have two projects in mind for it. The first is making my own external battery pack with the battery from the tablet.
I know the battery is rated for 3.7V at 4325mAh. A standard USB input is powered with 4.5-5.5V. I'm somewhat electrically knowledgeable, but I'm stumped on how to make sure I don't fry my phone or my Nexus 7 by plugging this battery into the USB port. My other dilemma is charging the battery back up, I'm assuming that this will take a small circuit to do.
Any ideas?
Thanks,
Austin
Click to expand...
Click to collapse
Hey Austin,
tell us exactly how you would like this battery to be used-
1. do you want to recharge battery over the USB port?
2. for what exactly you want to use the battery? For some other device? or for Nexus 7? Be more specific please.
I would generally advise if you want to do cool thing like
"external battery that can be hooked to device on-the-go as a mobile range extender"
you want to do this?
in this line of thinking we take note of;
-Voltage of battery nominal
-Voltage of the charging sources (110V,220V,USB +5V /4.5-5.5V/ )
+now when you are sure of this here you go
-at the bare minimum;
- resistors to lower the voltage in/reduce charging current (yes,minimalistic circuit),with a method to check/determine when battery is nearly full 99% cap as per li-ion battery requirement.Take note lithium ion batteries are absolutely forbidden to be overloaded or else kaboom!, self destruct, fire etc./take a look at youtube "li-ion self destruct"
-dig the li-ion charge reqs and methods from the available knowledge sources (e.g. the internet,electronic forums)
Are you up to this project?Wanna companion for this?Just let me know..
You need 3 things to use a raw battery as a USB source:
- a boost converter, to convert the battery's approximately 3.7V to a stable 5V
- a battery charger
- a protection circuit
The protection circuit is very important. If you over-discharge or over-charge a Li-ion battery, you can run into (explosive) trouble.
The battery may have a circuit on board. Can you see any circuitry in the cell? How many wires come out of it?
For example, eBay has plenty of random parts that should do the job:
Protection unit
Charger
Boost converter
You'll want to be really careful if the battery doesn't have on-board protection circuity. Lithium based batteries tend to explode or catch fire if they're improperly charged. Heck, you even hear about it happening to batteries in phones while they're in peoples pockets. Though I would assume some are from dodgy third party batteries.
You might be able to use something like the LiPo Rider Pro which is a premade board for charging Lithium Polymer batteries. It has two USB ports, one for charging and one for supplying power.
If you've never designed a power supply PCB before then I recommend using a ready made device like that, otherwise you could end up getting burned, literally.
A few years ago I just used one of those big 6V batteries and put a USB connector on it. Worked without any problems!
jhlaird said:
You need 3 things to use a raw battery as a USB source:
- a boost converter, to convert the battery's approximately 3.7V to a stable 5V
- a battery charger
- a protection circuit
The protection circuit is very important. If you over-discharge or over-charge a Li-ion battery, you can run into (explosive) trouble.
The battery may have a circuit on board. Can you see any circuitry in the cell? How many wires come out of it?
For example, eBay has plenty of random parts that should do the job:
Protection unit
Charger
Boost converter
Click to expand...
Click to collapse
This is of interest to me. I have a Zerolemon 7000mah battery and I'd like to use it as a recharging power pack for my i747 Gs3. With the newer high capacity batteries, this seems like a natural to me--if I'm out somewhere and don't want to put the Zerolemon in my Gs3, just hook it up to recharge. Is the lack of this kind of accessory due to varying battery types? I'd buy something like this if I could find one.
How to make it:
atminside said:
Guys, I've looked around some, but can't find the information I need for this project. I've come into posession of a friend's Nexus 7 8GB that's cracked, as I have two projects in mind for it. The first is making my own external battery pack with the battery from the tablet.
I know the battery is rated for 3.7V at 4325mAh. A standard USB input is powered with 4.5-5.5V. I'm somewhat electrically knowledgeable, but I'm stumped on how to make sure I don't fry my phone or my Nexus 7 by plugging this battery into the USB port. My other dilemma is charging the battery back up, I'm assuming that this will take a small circuit to do.
Any ideas?
Thanks,
Austin
Click to expand...
Click to collapse
Steps:
1. Learn or know battery and charger technology - especially concerning heat and fire safety. You do not want your house or car burn down "just because you hacked together a little interesting project". Take full consideration of all the sides of it. Experience..
2. Do it.
3. Share it here.
4. Evolve the design together with electronic-savy guys here.
Thats that.
Aside of the notes above - it is an interesting stuff if you have time for it.
Before anyone go crazy, it's most likely my fault. Since the battery is superglued to the phone I had to bend it pretty hard when I replaced the screen. And it was probably damaged
Anyway 6 month later my battery expanded and broke the glass back. There is a very visible bulge on the back (~1/16" thick), on a flat surface the phone wobble. I don't know when or how it happened, at some point I got the phone out of my pocket and it was broke.
I have a strong suspicion it happened while using a 2.4A/12V car charger at -25°C.
My real question (TL;DR) : Is there a risk using a 2.4A/12V car charger ? (my previous one was a 1A and it was barely charging the phone)
Doesnt matter what the current output of the charger is. The device has current limiting technology. It will max out at 1A so if your using a 2A charger your fine.
Also the car puts out 12VDC but it gets stepped down to 5V at the micro usb port. Thats the industry standard.
Now when you bent your battery you started the process of damaging it. Li-Ion batteries have a very thin sheet with paste on it and that is wound up with many layers. By bending it you probably flexed the thin sheet and that soft spot eventually broke and when that happens a chemical process begins to break down the battery. The bulging you are seeing is a buildup of gasses inside the sealed battery its self. When a battery begins to bulge its going bad. This can also happen prematurely if you expose it to over heating repeatedly OR for a long period of time, OR if you allow the battery voltage to drop to low for to long. Li-Ion just doesnt like heat or low voltage.
I concur with IAmSixNine you need to either replace the battery or get a new phone. And be sure to dispose of it properly. I had the same problem years and years ago with an old HTC touch diamond. The battery started bulging and I eventually had to remove the cover and use tape to hold it in. After a couple weeks it burst and it wasn't a pretty site... Pretty dangerous carrying around a battery that could explode in your pocket at any time.
Sent from my Nexus 4 using XDA Premium 4 mobile app
Thanks, good to know that the charger can't damage the battery, I have purchased a new battery lets just hope this one does not explode in the mean time
Ive replaced the battery, the first charge took 8hour to 90% and now it wont charger over 50% is there a way to reset the battery limit ?
Sent from my Nexus 4 using Tapatalk
let it cycle a few times to correct the battery information.
That means let it die down completely, then charge it completely. Do that a few times and if it still causing issues its possibly a bad battery.
I think I also have a faulty charging port, only the wireless charging is working now, when I plug into any usb there is the lightning icon but it says not charging. I'll switch the daughter board with the one from my other broken nexus 4 to see if it fix the issue.
As much as I like my Nexus 4, I'm not impressed by reliability. In under 2 year, I've had 2 broken screen, 1 broken bake cover, 1 expanded battery and now possibly the charging port. My nexus S and Galaxy nexus with a million drop each are still working as new
One of my friends got one and broke his before the 2 month mark. He was ribbing me about getting a case for it and making it more bulky. I was not the better man...
Hi guys, greetings!
I'm a new member here
Apparently, I had issue with fast charging problem. Basically what I did was changing cable and charger over and over again. I had to change my cable to which can hold up to 2.1A and a charger that has same output with stock charger which is 5V at 2A and 9V at 1.67A. I even bought enough cables just to see whether it is working or not, yet it doesn't fix my problem. I haven't changed my battery since this issue, I assume that this issue don't came in the battery rather it is from cable or charger. So I changed my flexy charge, but still can't do such a thing.
I had to reset my phone and factory settings, and yet it doesn't fix my problem
For some reason I'm frustrated with normal charge because I had to wait my phone fully charge like around 6 hours. And it drain also around 6 hours on use continuosly.
But it's crazy that this phone can hold it reliable for 6 years without any issue. It still in better shape. My only issue that came up was camera focus, can't read my sim card, and fast charging issue. And a missing S Pen lol. The camera focus and sim card aren't a big issue, since I can use alternative phone. And I can wait longer for my camera to focus to one object.
My questions are :
1) Does the battery affect fast charging too? I have my stock battery here which is 3220 mAh. If it's true, then maybe I'm going to change my battery with a newer one.
2) Is it possible that the processor in it some tiny part (which it controls the fast charging) is broken and that's why fast charging is stopped working?
3) I need to upgrade my phone to a same note series, but it's hard to pick. I kinda like galaxy note 9 than a newer one. But I want you guys to give me opinion. I need a longer battery life and it said note 9 is a beast battery. And a compatible software updates in future.
4) Does the battery that comes up with custom battery capacity is safe? Like does it fast charging? (like a ZeroLemon 11000 mAh and some chinese product that doubles the capacity stock battery)
5) Does the OS affects too? (This is the reason I did factory settings so I can see if it's work or not)
Thank you guys!
I'm using my N910C
fahadnajed said:
Hi guys, greetings!
I'm a new member here
Apparently, I had issue with fast charging problem. Basically what I did was changing cable and charger over and over again. I had to change my cable to which can hold up to 2.1A and a charger that has same output with stock charger which is 5V at 2A and 9V at 1.67A. I even bought enough cables just to see whether it is working or not, yet it doesn't fix my problem. I haven't changed my battery since this issue, I assume that this issue don't came in the battery rather it is from cable or charger. So I changed my flexy charge, but still can't do such a thing.
I had to reset my phone and factory settings, and yet it doesn't fix my problem
For some reason I'm frustrated with normal charge because I had to wait my phone fully charge like around 6 hours. And it drain also around 6 hours on use continuosly.
But it's crazy that this phone can hold it reliable for 6 years without any issue. It still in better shape. My only issue that came up was camera focus, can't read my sim card, and fast charging issue. And a missing S Pen lol. The camera focus and sim card aren't a big issue, since I can use alternative phone. And I can wait longer for my camera to focus to one object.
My questions are :
1) Does the battery affect fast charging too? I have my stock battery here which is 3220 mAh. If it's true, then maybe I'm going to change my battery with a newer one.
2) Is it possible that the processor in it some tiny part (which it controls the fast charging) is broken and that's why fast charging is stopped working?
3) I need to upgrade my phone to a same note series, but it's hard to pick. I kinda like galaxy note 9 than a newer one. But I want you guys to give me opinion. I need a longer battery life and it said note 9 is a beast battery. And a compatible software updates in future.
4) Does the battery that comes up with custom battery capacity is safe? Like does it fast charging? (like a ZeroLemon 11000 mAh and some chinese product that doubles the capacity stock battery)
5) Does the OS affects too? (This is the reason I did factory settings so I can see if it's work or not)
Thank you guys!
I'm using my N910C
Click to expand...
Click to collapse
Check your microUSB port and make sure the little flap in the port isn't bent and if it's dirty carefully clean the port. If you still have the original battery that came with your phone it will definitely need replaced with a new one. Lithium-ion battery degrade over time and have limited life span.
https://www.google.com/amp/s/www.bu...ies-are-only-meant-to-last-a-year-2015-10?amp
https://www.google.com/amp/s/www.androidcentral.com/how-tell-when-phones-battery-has-gone-bad?amp
Mr. JAVI said:
Check your microUSB port and make sure the little flap in the port isn't bent and if it's dirty carefully clean the port. If you still have the original battery that came with your phone it will definitely need replaced with a new one. Lithium-ion battery degrade over time and have limited life span.
Click to expand...
Click to collapse
Yes! I did that before I changed my flexy charger. It didn't fix my problem. It seems like there's some tiny part in processor is broken for some reason (like I told in this thread) or maybe some part an IC in the motherboard who controls it also damaged. I really don't understand how fast charging works.
I came up with a solution that I bought two new stock batteries and a desktop charger. So if my phone's battery is run out, I could change with my alternative battery. But I'm still frustrated for how it can't fast charging again.
1- Try cleaning the charging port with izoprophilic alcohol and some small brush (let dray the port 1-2 hours after, DON'T START the phone)
2- Make sure you have a quality charging cable (the 5$ from gas station or chinese cheap crap there are no good)
3-Same thing like at point 2 but with charger
I have like 3-4 charging flex with ports for note 4 and all are faulty so maybe this if you buy from china or ebay and its not from broken phones original.
If you have all good quality charger and cable and good charging port maybe IC power managament on motherboard is faulty, not CPU.
You can fix it but depends where you live will be more expensive than buying a second hand motherboard from aliexpress, its like 30$ I buy recently for a N910C
Me I don't use fast charging becouse its get too hot and is a secondary device
I want to buy and me a bigger battery I found on batteryUpgrade a 6900mAh but I don't know the quality and its almost 50$
Marian94 said:
1- Try cleaning the charging port with izoprophilic alcohol and some small brush (let dray the port 1-2 hours after, DON'T START the phone)
2- Make sure you have a quality charging cable (the 5$ from gas station or chinese cheap crap there are no good)
3-Same thing like at point 2 but with charger
I have like 3-4 charging flex with ports for note 4 and all are faulty so maybe this if you buy from china or ebay and its not from broken phones original.
If you have all good quality charger and cable and good charging port maybe IC power managament on motherboard is faulty, not CPU.
You can fix it but depends where you live will be more expensive than buying a second hand motherboard from aliexpress, its like 30$ I buy recently for a N910C
Me I don't use fast charging becouse its get too hot and is a secondary device
I want to buy and me a bigger battery I found on batteryUpgrade a 6900mAh but I don't know the quality and its almost 50$
Click to expand...
Click to collapse
Yes, I also did that way before I change my flexy charger. I brushed it with izoprophilic alcohol on charging port.
I'm pretty sure all I have is a high quality charger and cable. I still have my stock charger. I think there's no issue with charger, I couldn't really tell, since I tried all possible different charger. But with the cable, yes, I tested it one by one, because the issue might come from cable.
I think after all I did what's possible, there's something wrong with my IC charging or processor. I couldn't understand it but, does it guarantee if I changed like I pull the broken IC and put it back a new one, will do the fast charging?
But really though, how does fast charging works? Is it include in processor by some tiny part transistor? or is it an independent IC in the motherboard?
100% is another chip on motherboard that do the charging
I have a similar problem with a samsung tab s t800 that charging very slow becouse of faulty IC power manageament
I'm opened my note 4 for many times until now and repairing it
I've been watching many board repairs I have some skills but no tools to repairs bords for now
Its not the CPU
I watch a similar board fix on note 9 and was a diferent chip on board that manage the charging
Go to a service if you want to repair, don't try to do something at home becouse you have hight chances to destroy much more the phone
Repairing you phone at a repair shop will be more than 30$ so better buy a "new" motherboard from aliexpress