I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
mail_e60 said:
I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
Click to expand...
Click to collapse
Ofcourse it can/will.
Do not buy anything cheap/electrical from ebay that comes from China. Even the SD cards are fake, ie branding aswell as size.
mail_e60 said:
I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
Click to expand...
Click to collapse
As I know car charger about 12v output, our tab charging with 5v = normal usb can offer.
I think the device being heat up and for a period of time could cause damage, pls justify if I am wrong.
Sent from my GT-P7510 using XDA Premium App
yes, some product (aftermarket) had a different power supply rather than oem one, it may potentially supply a different electric input to the device
You want to make sure that it has the same volt/amp output, but even if it does i'd be wary of it heating up too much
I don't think there's much risk to the Tab. The output of the various USB chargers (car, wall wart, etc.) is regulated at 5V, and they're usually rated at half an amp.
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
noguru said:
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
Click to expand...
Click to collapse
The Samsung charger seems to refuse to power other devices, which is mildly annoying. There are plenty of USB devices which can handle more than 500mA, Blackberries for example, and generally speaking chargers won't offer more amperage than the device asks for.
And a lower-amp charger won't be damaged, as it simply won't be able to give more than the rated amperage. It'll just charge your Tab much more slowly
Perhaps it could be considered
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Has a same voltage(it said), using 4pcs AA battery, save us while far away from charging
sent from my 2.3.3|dxkg3 DJGalaxy S2
noguru said:
I don't think there's much risk to the Tab. The output of the various USB chargers (car, wall wart, etc.) is regulated at 5V, and they're usually rated at half an amp.
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
Click to expand...
Click to collapse
A standard PC USB gives 5V at 500mA or 0.5A. Why would a car charger giving the same cause internal meltdown? If you plug the SGT into a PC with the data cable it doesn't suffer internal meltdown either... The SGT definitely has an internal charge controller and overcharge protector so there is really no danger. Unless its a cheap chinese product that either has power surges (unlikely) or incorrect voltage (or extreme current like 5A or so...). To be sure, check the outputs with a multimeter.
Declan79 said:
Perhaps it could be considered
Has a same voltage(it said), using 4pcs AA battery, save us while far away from charging
sent from my 2.3.3|dxkg3 DJGalaxy S2
Click to expand...
Click to collapse
That is a TERRIBLE idea! I suggest you stop immediately! If you're unlucky you could really screw up electronic components in your tab. Unless I am missing something like voltage/current regulation in the battery adapter. Is there a pcb in the battery case or is it just wired directly to the usb? And have you ever actually done the math on the voltage? 1.5V x 4 = 6V or with rechargeables, 1.2 x 4 = 4.8V, not 5V!! Although a cell/battery alone usually won't mind that difference, you are sending electricity through complex electronics, not directly charging the battery. The Tab is expecting 5V exactly and stepping up/down the voltage accordingly (to 3.7 or 7.4V for the internal Li battery).
Tl;dr
@ noguru: check your outputs with a multimeter,
@ Declan79: I suggest you stop using that contraption at once! (for your own good)
Even it only using 4pcs aa battery?
sent from my 2.3.3|dxkg3 DJGalaxy S2
Declan79 said:
Even it only using 4pcs aa battery?
sent from my 2.3.3|dxkg3 DJGalaxy S2
Click to expand...
Click to collapse
If the output is not a stiff 5v, then I would not use it.
I am using a cheap ebay charger, but it does output a good 5v at 2amps. That is the only thing that really matters. It doesnt get too hot. If a charger gets too hot you can bet that it will not have a long life and you hope that when it dies it doesnt take your Gtab with it.
Related
The Galaxy Note 2 comes with a 2 Amp AC adapter/charger so I was curious to compare the charging capability of the stock charger to other chargers that I already own. I cut open a USB to uUSB cord and used a current meter to see how much 5V current was flowing from the charger into the phone. These results are only good for a Galaxy Note 2. Other phones will draw a different about of current (probably lower). Details of the setup can be found far below.
The conditions were:
Battery level = 48%
Voltage was measured on the cable about four inches from the phone
Only the charger was changed between tests (used the exact same cable/setup for each test).
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The results explain why the Note 2 charges so fast compared to the original Note that I had. Something to keep in mind with dual port chargers...... when I had the two dual port car chargers apart modifying them (the D+ and D- setup so my Note 1 would recognize it as a dedicated charger), I noticed that both chargers used a single 5V regulator and simply ran the power for the two USB ports in parallel. That means that although they say it is a dual 1A charger it could be used as a single 2A charger. I can't say every dual charger is setup that way, but it seems unlikely they would spend the $$ on two different regulator circuits.
Details:
The cable is about three feet long. I cut the cable about four inches from the uUSB connector (where the phone connects). I soldered the ground, data +, and data - wires back together and just left the 5V red wire open so I could insert a current meter (used a Fluke 189 on the 10A mode).
For most people, it is probably best to just buy a car charger that will support 2A for Android. Note that many chargers are setup (their D+ and D- pins) for Apple so you may not get full charging current. That may take a little digging around to see what others have found.
Very interesting! Thanks for posting this as I'd prob would have bought an Iphone car charger. I now know not to, question is what one would be best for matching amperage draw compared to the stock Samsung one(might just order the official, it's cheap).
Thank goodness I bought a lot of those HP touchpad chargers!
I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html
One of you isn't right...
I would love to buy a 2A OEM charger but Samsung hasn't had it on their site for quite some time.
keplenk said:
Thank goodness I bought a lot of those HP touchpad chargers!
Click to expand...
Click to collapse
I cleaned up on those HP Touchpad chargers when they were blowing them out for $5 each. I bought five of them and scattered them all around home and work. Of course the GN2 has such good battery life that I probably won't be needing them much.
mdt73 said:
I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html One of you isn't right...
Click to expand...
Click to collapse
He tested the maximum current you could get out of each charger. In other words, how much current can you pull until the current limit of the regulator kicks in and the voltage severely drops. I measured how much current the Galaxy Note 2 will pull from each charger. The phone dictates the amount of current pulled as long as that current level is below the maximum current of the charger (he lists the maximum possible current for each charger). If I hooked up the stock Samsung 2A charger to a GS2, it would likely draw less than 1A because it has a smaller battery so it is designed to charge at a lower current. All my results are specific to the Galaxy Note 2.
Here's another crazy data point. I tried 3 different chargers and 4 different USB cables with a killawatt. The stock white cable pulled at least 1.5 more watts than the other cables, which were note1, evo3d and monoprice cables.
At this point I think Samsung increased the wire gauge on the note2 USB cable, to get the resistance down a bit. Hmm this might even be measurable. More stuff to check out tomorrow.
Oh, I tested several 2amp or greater power supplies, and the stock note2 PSU always did slightly better.
A lot of us have the slow charging problem. I'm pretty sure it's a hardware problem and the micro USB port isn't the highest quality and suffers from wear and tear. I've already replaced one and was going to have to do a second.
Instead, I've come up with a brute force solution that seems to be working. Whether it's hardware or software or green aliens, I simply increased the current flow by increasing the voltage. I bought a 5.6V 2A generic charger off eBay and wired a micro USB charger cable to it. Just two wires, +ve and -ve. Seems to be working. I tried 6V but the tablet rejected it.
It's not perfect but I can charge the tablet in about 4-5 hours, as opposed to 2 days. I'll post updates if anyone is interested.
Sent from my LG-V500 using XDA Free mobile app
LeighR said:
A lot of us have the slow charging problem. I'm pretty sure it's a hardware problem and the micro USB port isn't the highest quality and suffers from wear and tear. I've already replaced one and was going to have to do a second.
Instead, I've come up with a brute force solution that seems to be working. Whether it's hardware or software or green aliens, I simply increased the current flow by increasing the voltage. I bought a 5.6V 2A generic charger off eBay and wired a micro USB charger cable to it. Just two wires, +ve and -ve. Seems to be working. I tried 6V but the tablet rejected it.
It's not perfect but I can charge the tablet in about 4-5 hours, as opposed to 2 days. I'll post updates if anyone is interested.
Sent from my LG-V500 using XDA Free mobile app
Click to expand...
Click to collapse
I too have this problem, but i really didn't notice it till i had to go on a trip a friend and was gone 4 days. the tablet was on, but asleep.
When i got back the tablet was dead. it seemed to take over a full day of charging to get it back to full. Then a couple of days later i had got my Y charger adapter. i installed it, and added a USB stick for more storage.
I found out the next day i had to go out of town again, but i was going to drive this time. After being on the road a few hours playing videos, i noticed my tablet using more power than it was charging. So i removed the Y thinking it was faulty even tho it showed it was charging. I still had a slow charging problem with it removed.
I would like to know if this did indeed fix your issue.
It's not perfect but it will at least maintain battery whilst gaming with brightness up. Charging when off is WAY quicker than a standard 5V charger
Sent from my LG-V500 using XDA Free mobile app
I've been "fixing" my Apple wired chargers for use with my Android devices.
## SKIP THIS IF YOU USE STOCK CHARGER ##
Probably 99.9% of android devices will expect shorted data pins, which is supposed to be the USB charging port standard. There are manufacturers that deviate slightly from this. For example Samsung adds 1.2volts to the data pins to signal that it's connected to a Samnsung charger and try to pull more amps (mostly for their early tablets). With the the S4 they added another signal voltage for their new 2 amp charger.
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## END SKIP##
Now for my point. My Nexus7, and S3 use the smb347 management IC (maybe the S4 too). It is picky when it comes to input voltage, and in the case of the Nexus7 it was programmed to be EXTRA picky. The USB standard port voltage is 5.0 ±0.25, while I believe a USB3 dedicated charging port raised this to 5.3volts. I would personally not follow LeighR advice and set up a supply to feed my devices with over 5.4volts.
If I was you I would look for chargers with a voltage under load of atleast 5.2. Use a multimeter to measure, I love the ChargerDoctor, but they used cheap connectors it drops a lot of voltage on top of the parasitic usage.
https://lh6.googleusercontent.com/-...Zt7W_x_A/w612-h816-no/IMG-20140709-WA0002.jpg
https://lh5.googleusercontent.com/-..._fkpgbzc/w612-h816-no/IMG-20140709-WA0003.jpg
Before mods:
https://lh3.googleusercontent.com/-...pJsAUnY/w1277-h958-no/IMG_20140607_185306.jpg
https://lh5.googleusercontent.com/-...719-h958-no/IMG_20140618_141229%3Anopm%3A.jpg
After mods (Bridged data pins, 150k+47k resistors feeding pins with 1.2):
https://lh6.googleusercontent.com/-...AAAAAApg8/p4rvEEEyMyI/w719-h958-no/2014-06-18
Charging my S3
https://lh5.googleusercontent.com/-...3VDZwiA/w1277-h958-no/IMG_20140618_143535.jpg
https://lh5.googleusercontent.com/-...skyVdO8/w1277-h958-no/IMG_20140618_143539.jpg
Idle https://lh3.googleusercontent.com/-...icLhIC2c/w719-h958-no/IMG-20140710-WA0006.jpg
Charging my N7, note the Nexus is programmed to be even more picky. It waits up to a minute to see if the charger is crap before switches from AC into an even higher amp mode.
Pulling 1.<something> takes 2-3 hours for a full charge from low battery (5-20%).
https://lh5.googleusercontent.com/-...1j-A27s/w1277-h958-no/IMG-20140710-WA0000.jpg
https://lh6.googleusercontent.com/-...2sQS3Go/w1277-h958-no/IMG-20140710-WA0002.jpg
---------- Post added at 06:08 PM ---------- Previous post was at 06:05 PM ----------
If you are too lazy to check or test any of that the Nexus 5 forums love these: http://www.amazon.ca/gp/product/B00...pf_rd_t=101&pf_rd_p=1687860482&pf_rd_i=915398
Any of the new "smart" chargers that detect the connected device should also work: http://www.amazon.ca/Family-Sized-D...id=1407621965&sr=8-1&keywords=powerIQ+charger
weedy2887 said:
I've been "fixing" my Apple wired chargers for use with my Android devices.
## SKIP THIS IF YOU USE STOCK CHARGER ##
Probably 99.9% of android devices will expect shorted data pins, which is supposed to be the USB charging port standard. There are manufacturers that deviate slightly from this. For example Samsung adds 1.2volts to the data pins to signal that it's connected to a Samnsung charger and try to pull more amps (mostly for their early tablets). With the the S4 they added another signal voltage for their new 2 amp charger.
## END SKIP##
Now for my point. My Nexus7, and S3 use the smb347 management IC (maybe the S4 too). It is picky when it comes to input voltage, and in the case of the Nexus7 it was programmed to be EXTRA picky. The USB standard port voltage is 5.0 ±0.25, while I believe a USB3 dedicated charging port raised this to 5.3volts. I would personally not follow LeighR advice and set up a supply to feed my devices with over 5.4volts.
If I was you I would look for chargers with a voltage under load of atleast 5.2. Use a multimeter to measure, I love the ChargerDoctor, but they used cheap connectors it drops a lot of voltage on top of the parasitic usage.
https://lh6.googleusercontent.com/-...Zt7W_x_A/w612-h816-no/IMG-20140709-WA0002.jpg
https://lh5.googleusercontent.com/-..._fkpgbzc/w612-h816-no/IMG-20140709-WA0003.jpg
Before mods:
https://lh3.googleusercontent.com/-...pJsAUnY/w1277-h958-no/IMG_20140607_185306.jpg
https://lh5.googleusercontent.com/-...719-h958-no/IMG_20140618_141229%3Anopm%3A.jpg
After mods (Bridged data pins, 150k+47k resistors feeding pins with 1.2):
https://lh6.googleusercontent.com/-...AAAAAApg8/p4rvEEEyMyI/w719-h958-no/2014-06-18
Charging my S3
https://lh5.googleusercontent.com/-...3VDZwiA/w1277-h958-no/IMG_20140618_143535.jpg
https://lh5.googleusercontent.com/-...skyVdO8/w1277-h958-no/IMG_20140618_143539.jpg
Idle https://lh3.googleusercontent.com/-...icLhIC2c/w719-h958-no/IMG-20140710-WA0006.jpg
Charging my N7, note the Nexus is programmed to be even more picky. It waits up to a minute to see if the charger is crap before switches from AC into an even higher amp mode.
Pulling 1.<something> takes 2-3 hours for a full charge from low battery (5-20%).
https://lh5.googleusercontent.com/-...1j-A27s/w1277-h958-no/IMG-20140710-WA0000.jpg
https://lh6.googleusercontent.com/-...2sQS3Go/w1277-h958-no/IMG-20140710-WA0002.jpg
---------- Post added at 06:08 PM ---------- Previous post was at 06:05 PM ----------
If you are too lazy to check or test any of that the Nexus 5 forums love these: http://www.amazon.ca/gp/product/B00...pf_rd_t=101&pf_rd_p=1687860482&pf_rd_i=915398
Any of the new "smart" chargers that detect the connected device should also work: http://www.amazon.ca/Family-Sized-D...id=1407621965&sr=8-1&keywords=powerIQ+charger
Click to expand...
Click to collapse
weedy2887, my issue is that my tablet is a permanent install in a car, so i must use 12V-DC.
I have a 5.0V charger plugged into a cigarette lighter, and using the factory USB cable that can be plugged into an AC or DC connector.
Any suggestions for a fixed car mount?
Weedy2887 is correct that over voltage is of course a potential danger to your device. However, if the voltage is too high, your tablet/phone will reject it.
The voltmeter idea looks great but the problem is with the N7 microUSB connector. So you could be supplying 5.3 volts but high resistance due to a poor connection will drop some voltage and the potential difference actually reaching the battery will be lower, hence the slow charge.
He is of course correct that if your tablet is NOT faulty, it is not a good idea to hit it with a high voltage.
I like the idea of a smart charger - is it a constant current generator? Or does it detect current drawn and vary voltage accordingly? That would be an excellent solution. In any case, some great info posted, thanks.
Regarding the car installation, if your tablet has the super slow charging problem and you want to copy my solution, you'll need to find an in-car charger that puts out 5 and a bit volts and then wire on a micro USB connector.
Sent from my LG-V500 using XDA Free mobile app
Being permanently installed changes nothing. You still need to pick a better supply.
Something adjustable, and then buy a micro usb plug:
http://www.ebay.ca/itm/Adjustable-B...814?pt=LH_DefaultDomain_0&hash=item5667dc04a6
http://www.ebay.ca/itm/10PCS-Right-...567?pt=LH_DefaultDomain_0&hash=item2eca7f994f
or a better cig converter:
http://www.amazon.ca/Anker®-Dual-Po...id=1407657253&sr=8-2&keywords=powerIQ+charger
I dislike the idea of relying on the device to reject over voltage, it just feels dirty to me. And your point about connector losses is interesting. You could calibrate the charger with the tablet open and a multimeter on the solder behind the socket.
The "smart" part of the charger is it can detect what the client device is and setup the right pin out on the plug. IE: Apple, Android, HTC, or Samsung.
All very valid points. Agreed
Sent from my LG-V500 using XDA Free mobile app
weedy2887 said:
or a better cig converter:
http://www.amazon.ca/Anker®-Dual-Po...id=1407657253&sr=8-2&keywords=powerIQ+charger
Click to expand...
Click to collapse
I'm not understanding how this item is better than what i'm using.
This says:
PowerIQ™ technology maximizes compatibility with Android, Apple or other devices by enabling charge speeds of up to 2.4 amps.
What i'm using now says it is a 5 amp.
http://www.usbzilla.com/chrager-adapter-sony-xperia-icon-sola-p-1741.html
The one i had before had 2 connections. (1.5 amp and 2.1 amp bought from CVS)
http://www.dhgate.com/product/colorful-dual-usb-2-ports-car-charger-cigarette/160188100.html
Try this first: http://forum.xda-developers.com/showthread.php?t=2188910&page=3 Not the whole thread look at Post #25
This fixed the N7 I had. Takes about twenty minutes. Carefully pop the battery out, take out some screws to get access to the ribbon cable contact at the bottom, clean it and reconnect. Clean the top contact too by the battery plug.
It's not the usb port it's those damn little contacts on the ribbon cable.
In your case it was the ribbon cable. And you're right, it could be for other people too. But in other cases it's a worn microusb port or other issues.
Sent from my LG-V500 using XDA Free mobile app
02sonicblue said:
I'm not understanding how this item is better than what i'm using.
This says:
PowerIQ™ technology maximizes compatibility with Android, Apple or other devices by enabling charge speeds of up to 2.4 amps.
What i'm using now says it is a 5 amp.
http://www.usbzilla.com/chrager-adapter-sony-xperia-icon-sola-p-1741.html
Click to expand...
Click to collapse
powerful 5 watt charging circuit to power up your iPhone, iPod or smartphone quickly
Click to expand...
Click to collapse
Watts are not amps.
It's probably wired for Apple.
It doesn't matter what the side of it says it will put out.
The only thing that matters is what the tablet THINKS it can pull. After that is all down to the voltage level it will sustain under load.
yosmokinman said:
Try this first: http://forum.xda-developers.com/showthread.php?t=2188910&page=3 Not the whole thread look at Post #25
This fixed the N7 I had. Takes about twenty minutes. Carefully pop the battery out, take out some screws to get access to the ribbon cable contact at the bottom, clean it and reconnect. Clean the top contact too by the battery plug.
It's not the usb port it's those damn little contacts on the ribbon cable.
Click to expand...
Click to collapse
LeighR said:
In your case it was the ribbon cable. And you're right, it could be for other people too. But in other cases it's a worn microusb port or other issues.
Click to expand...
Click to collapse
This method works for me, although not perfect. From frustratingly long 22 hour charge time down to 6 hours on 1.5amp charger
While the improvement is great, your still charging in USB mode.
The tablet will charge in a little over 2 hours if it's pulling over an amp from a charger.
Hey Nexus 6 owners, I'm patiently waiting for mine to show up tomorrow but I was wondering how long the charging cord is that comes with the phone?
If its short, has anyone replaced it with a linger cord and if so does it affect the fast charging feature or is that built into the wall plug?
spunks3 said:
Hey Nexus 6 owners, I'm patiently waiting for mine to show up tomorrow but I was wondering how long the charging cord is that comes with the phone?
If its short, has anyone replaced it with a linger cord and if so does it affect the fast charging feature or is that built into the wall plug?
Click to expand...
Click to collapse
Its short...maybe three feet.
brizey said:
Its short...maybe three feet.
Click to expand...
Click to collapse
Crud, I have a 6 foot cord but it prob won't work with turbo charge or whatever its called ... Guess I'll post my results when I have a few days to compare...
A longer cord should be a thicker gauge in order to offset the loss of energy. You can find 28/24 gauge (28 gauge data and 24 gauge power) USB cables just about anywhere.
Here is the cable I am using which is 6ft long: http://www.amazon.com/iXCC-Charger-Samsung-Android-Tablets/dp/B00MVAO742/
Here is a picture comparing it to the OEM cable.
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Charging with the OEM 3ft cable
Charging with the iXCC 6ft cable
First off, we should clarify that the Quick Charge 2.0 standard requires a data cable (not a charge-only cable) to work. In other words, it needs all four USB pins to be connected the their counterparts at the other end. If you have a longer cable, and it's not working, this is likely why. (Or, more precisely, it may charge your phone, but it'll be locked to the 5V setting, and won't be able to activate the 9V or 12V settings.)
Technically, ANY cable reduces DC voltage, and thus, the power that makes it to the other end. A one-inch cable has a voltage drop, as does a 50-foot cable. The difference is in the amount. So, ANY cable will affect fast charging. However, voltage drop is typically measured in percentages, so it will drop Quick Charge 1.0 (the 2A USB charge that we all know and love) the same percentage as it will with Quick Charge 2.0. However, since a standard (QC 1.0) cable charges at a max of 10W, and a QC 2.0 cable charges at a max of 36W, you'll see a larger drop with the higher power QC 2.0, even though the percentage would be the same. (I should point out that no QC 2.0 adapter currently charges at the 36W theoretical maximum. Even Moto's Turbo Charger is only pushing 14.4W at both the 12V and 9V levels, whereas the standard allows a maximum of 36W and 27W at those levels respectively.)
You can reduce the amount of voltage drop by buying AWG 20 or 22 cables (most USB cables are AWG 24 or even 28), but those are a lot thicker. The reality is that even an AWG 24 cable only loses like 6% voltage drop at 3M (10ft.), which is less than the 10% voltage variance allowed by most adapters. In short, you're not even going to notice. Unless you're dealing with a 25-50 ft. cable, I wouldn't worry about it "affecting" quick charge, because the only ones who will really notice the difference are the electrical engineers who designed it.
I have a 5 feet(standard OEM) Samsung cable dedicated for charging only, and it turbo charges the same as the stock one
jt3 said:
First off, we should clarify that the Quick Charge 2.0 standard requires a data cable (not a charge-only cable) to work. In other words, it needs all four USB pins to be connected the their counterparts at the other end. If you have a longer cable, and it's not working, this is likely why. (Or, more precisely, it may charge your phone, but it'll be locked to the 5V setting, and won't be able to activate the 9V or 12V settings.)
Technically, ANY cable reduces DC voltage, and thus, the power that makes it to the other end. A one-inch cable has a voltage drop, as does a 50-foot cable. The difference is in the amount. So, ANY cable will affect fast charging. However, voltage drop is typically measured in percentages, so it will drop Quick Charge 1.0 (the 2A USB charge that we all know and love) the same percentage as it will with Quick Charge 2.0. However, since a standard (QC 1.0) cable charges at a max of 10W, and a QC 2.0 cable charges at a max of 36W, you'll see a larger drop with the higher power QC 2.0, even though the percentage would be the same. (I should point out that no QC 2.0 adapter currently charges at the 36W theoretical maximum. Even Moto's Turbo Charger is only pushing 14.4W at both the 12V and 9V levels, whereas the standard allows a maximum of 36W and 27W at those levels respectively.)
You can reduce the amount of voltage drop by buying AWG 20 or 22 cables (most USB cables are AWG 24 or even 28), but those are a lot thicker. The reality is that even an AWG 24 cable only loses like 6% voltage drop at 3M (10ft.), which is less than the 10% voltage variance allowed by most adapters. In short, you're not even going to notice. Unless you're dealing with a 25-50 ft. cable, I wouldn't worry about it "affecting" quick charge, because the only ones who will really notice the difference are the electrical engineers who designed it.
Click to expand...
Click to collapse
I mean the length of the cable matters, but as long as it's AWG 24 or thicker then it should be fine.
The attached graph shows 3 cables at 1, 3, and 6 ft lengths. They are all 28/28 gauge.
Working fine here with a 10ft cable.
Sent from my Nexus 6 using Tapatalk
spunks3 said:
If its short, has anyone replaced it with a linger cord and if so does it affect the fast charging feature
Click to expand...
Click to collapse
The provided cable is typical. Neither short nor long. Fortunately cable length is, if reasonable, irrelevant. I checked a 10 foot standard gauge cable and it charges at "high" speed.
I am looking to buy some 28/24 cables from monoprice...probably 6ft...since the included cable is even shorter than the Nexus 5 cable, which was barely enough for me.
Does anyone know if the included Nexus 6 cable is 24 or 28 gauge?
Also, I'd like to do some comparison between my cables to see which ones charge the fastest and how many mA they can pull...this is best done on a low battery, correct? At high charge levels it won't pull anywhere near 2000mA, from my understanding.
jeffreii said:
I am looking to buy some 28/24 cables from monoprice...probably 6ft...since the included cable is even shorter than the Nexus 5 cable, which was barely enough for me.
Does anyone know if the included Nexus 6 cable is 24 or 28 gauge?
Also, I'd like to do some comparison between my cables to see which ones charge the fastest and how many mA they can pull...this is best done on a low battery, correct? At high charge levels it won't pull anywhere near 2000mA, from my understanding.
Click to expand...
Click to collapse
I think pretty much all manufacturers use the 28/24 cables (which means, 28 Gauge for the data wires and 24 Gauge for the power wires). If you're REALLY concerned about it, Newegg has some 22 Gauge cables (that are actually 28/22 Gauge). They're the thickest cables that I've been able to find that are readily available without a crazy bulk requirement (like 1000 or more). If you buy two or more, they're less than $4 each, but that's still 3x the price of the 28/24 cables from Monoprice. The reality is that even without the turbo charger, the difference in charge time between the two (6 ft.) cables will likely be a few minutes at most.
Oh, also... If you're using the Turbo charger, you're not going to get close to 2A (2000mA) anyway, since it's only a 1.6A charger (at 5V or 9V -- 1.2A at 12V).
Thanks for the clarification. I read that most cheap cables are 28/28.
I have a 10 ft cable I bought from amazon works good fully charges phone in about 45mins
jeffreii said:
Thanks for the clarification. I read that most cheap cables are 28/28.
Click to expand...
Click to collapse
Yeah, I should clarify a bit further. When I said "manufacturers," I meant phone manufacturers. In other words, the data cables that typically come with phones will be 28/24. Cheap data cables can be 28/28 (sometimes with a nice thick shroud to hide this fact). Usually though, the really cheap cables won't be data cables at all, but charge-only cables. A lot of those are 28 Gauge.
digweed4me said:
I have a 10 ft cable I bought from amazon works good fully charges phone in about 45mins
Click to expand...
Click to collapse
What's the name of the 10ft cable and can you repost the link or item # on Amazon, the original link is directing me to the Amazon home page not an item page. Thanks.
ggfb20 said:
What's the name of the 10ft cable and can you repost the link or item # on Amazon, the original link is directing me to the Amazon home page not an item page. Thanks.
Click to expand...
Click to collapse
i bought gold plated ones
http://www.amazon.com/Hi-mobiler-Ch...amsung+Lg+HTC+and+Other+Tablet+Smartphone+(Bl
Just ordered two of them.
How can you tell which is which?
jt3 said:
First off, we should clarify that the Quick Charge 2.0 standard requires a data cable (not a charge-only cable) to work. In other words, it needs all four USB pins to be connected the their counterparts at the other end. If you have a longer cable, and it's not working, this is likely why. (Or, more precisely, it may charge your phone, but it'll be locked to the 5V setting, and won't be able to activate the 9V or 12V settings.)
Technically, ANY cable reduces DC voltage, and thus, the power that makes it to the other end. A one-inch cable has a voltage drop, as does a 50-foot cable. The difference is in the amount. So, ANY cable will affect fast charging. However, voltage drop is typically measured in percentages, so it will drop Quick Charge 1.0 (the 2A USB charge that we all know and love) the same percentage as it will with Quick Charge 2.0. However, since a standard (QC 1.0) cable charges at a max of 10W, and a QC 2.0 cable charges at a max of 36W, you'll see a larger drop with the higher power QC 2.0, even though the percentage would be the same. (I should point out that no QC 2.0 adapter currently charges at the 36W theoretical maximum. Even Moto's Turbo Charger is only pushing 14.4W at both the 12V and 9V levels, whereas the standard allows a maximum of 36W and 27W at those levels respectively.)
You can reduce the amount of voltage drop by buying AWG 20 or 22 cables (most USB cables are AWG 24 or even 28), but those are a lot thicker. The reality is that even an AWG 24 cable only loses like 6% voltage drop at 3M (10ft.), which is less than the 10% voltage variance allowed by most adapters. In short, you're not even going to notice. Unless you're dealing with a 25-50 ft. cable, I wouldn't worry about it "affecting" quick charge, because the only ones who will really notice the difference are the electrical engineers who designed it.
Click to expand...
Click to collapse
How can you tell if it is a data cable or a charge-only cable without taking it apart?
dalegg said:
How can you tell if it is a data cable or a charge-only cable without taking it apart?
Click to expand...
Click to collapse
The easiest way is to use it to plug your phone into a computer. If your computer doesn't recognize that you've plugged your phone in, but does with other cables, then it's probably a charge-only cable.
spunks3 said:
Hey Nexus 6 owners, I'm patiently waiting for mine to show up tomorrow but I was wondering how long the charging cord is that comes with the phone?
If its short, has anyone replaced it with a linger cord and if so does it affect the fast charging feature or is that built into the wall plug?
Click to expand...
Click to collapse
XtremeGuard is always doing 80% Off sales. Got one of their 6' cables for like 2$ and it works great with the Nexus6 turbo charger.
Hello,
I recently bought a Nexus 5X, and as you know it comes without a USB C to A adapter. So I ordered a cable from a china online store and will test it with CheckR. But if it isn't safe I was wondering if I could make an adapter that would connect the data lines to computer and the 5v line to an external power supply, capable of supplying 5V/10A. Does anyone know if this would work and how safe would it be?
The connections are shown in the schematic on the link(remove the space between goo. and gl)
goo. gl/yaSZZ0
Thanks for any help!
I can't figure out where the danger is here. If you have a charger that outputs 5v @ 1.0 amp, it's going to output that to the phone no matter what right? The phone is essentially the dumb end right, it takes what it can get.
I have cables now that according to Benson do not meet the USB C spec, and cables that do meet the spec. Both brands of cables pass the Checkr app test though.
Both cables say charging slowly on the phone when plugged into a low amp charger or a PC port. The only difference I've noticed is the cable with the 56k pullup resistor still says charging even when hooked to a port that is cable of rapid charging.
So best I can tell nothing can be damaged here, just if you get the "in spec" cable with the 56k resistor, it will always slow charge, even when plugged into a device cable of charging faster?
*edit* Just for clarification, the cable with the 56k resistor will do "charging slowly" and "charging", whereas the cable without will do rapid charging on devices that can output the extra current. So while I say slow charging, it's still capable of charging at a "normal" rate */edit*
A big part of the issue is that it can try to pull more current from the port than the port can supply, and possibly damage it. Once the port is damaged who knows how it will react or what it will be supplying. Most USB A ports aren't going to supply 3A safely that's where the concern is. On the unsafe thing here is more https://plus.google.com/+BensonLeung/posts/HakwCMmd346
You are essentially creating a powered hub with that, I've done similar to make a powered OTG. You should be able to charge from it if the power supply is correct. Obviously, it's on you to decide if it is correct and worth the possible risk.
So I get voltage is pushed, amperage is pulled. So is the problem only on incorrectly designed power supplies / chargers that dont limit their output current?
So far every port / charger Ive used my 5x has charged correctly on (only drawing what the port can supply). The only catch here is cables that Benson tested in spec (with the 56k pull up resistor) wont support "charging rapidly" on ports that are capable of it.
OhioYJ said:
So I get voltage is pushed, amperage is pulled. So is the problem only on incorrectly designed power supplies / chargers that dont limit their output current?
So far every port / charger Ive used my 5x has charged correctly on (only drawing what the port can supply). The only catch here is cables that Benson tested in spec (with the 56k pull up resistor) wont support "charging rapidly" on ports that are capable of it.
Click to expand...
Click to collapse
One thing to consider is that the USB A chargers were never meant to charge C devices, so it's not that they are all improperly designed, just that they are designed for a different spec. The PU is on the Configuration Control pin and is meant to configure the device to what the source is rated for, 56k will set it to "Default USB Power 500mA for USB2.0, 900mA for USB3.0". The charger lacks the PU to configure the device and the 56k PU in the cord is there to fix that and sets it to default values in order to make it work across all sources/ports. I found some C spec information from here if you want more to look at.
As long as the 5X was getting no more than it's 5v 3A and the source was safely providing the power then I don't see where the issue would be.
Keithn said:
One thing to consider is that the USB A chargers were never meant to charge C devices, so it's not that they are all improperly designed, just that they are designed for a different spec.
Click to expand...
Click to collapse
I'm more inferring that if there is a fire or melted plug, it was an improperly designed device. Any charger or power supply should be limited to a max safe current anyways, regardless of what the device or cable would like to pull.
Thanks for the link though, I had never really looked into why (how) it was reversible, or what the various resistor were doing. It's actually a pretty interesting read. It really strikes me as they wanted to create a do it all cable, but that just ended up making it really complex for no reason.
Ok so in the end the CheckR app claims the phone is charging with 3A and that the cable is unsafe but the phone says charging slowly and i tested with an ammeter and it's only about 350mA so the cable is safe. Apparently the CheckR app really can't be trusted.
sasko123 said:
Ok so in the end the CheckR app claims the phone is charging with 3A and that the cable is unsafe but the phone says charging slowly and i tested with an ammeter and it's only about 350mA so the cable is safe. Apparently the CheckR app really can't be trusted.
Click to expand...
Click to collapse
Which cable are you using? It is not necessary for the 5X to draw 3A at all times, in fact it wont - even with the stock USB C charger. It depends on the current battery level, the heat, and the charger. And don't go by the 'charging rapidly/slowly' indication, it isn't consistent when the 5X is paired with Type A cables (compliant or not) and chargers. Using Ampere or Current Monitor is better to monitor the draw.
roofrider said:
Which cable are you using? It is not necessary for the 5X to draw 3A at all times, in fact it wont - even with the stock USB C charger. It depends on the current battery level, the heat, and the charger. And don't go by the 'charging rapidly/slowly' indication, it isn't consistent when the 5X is paired with Type A cables (compliant or not) and chargers. Using Ampere or Current Monitor is better to monitor the draw.
Click to expand...
Click to collapse
I'm using this cable: goo. gl/ayfgEk (can't post links yet). I did a test today and the result is: according to my ammeter at 27% battery the phone draws about 250-400mA. At the same time the Ampere app jumps from 190 to 540mA (it even went to over 2000mA but I didn't get a picture of that) so the cable seems safe to me. So am I missing something or the Ampere app really can't be trusted?
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I'm using the cable here goo. gl/ayfgEk (can't post link yet) I think using a physical ammeter would be the best way to monitor the current. I will do some more testing(using both the Ampere app and my ammeter) at different battery levels. Will report back.
Also the site claims it's USB 3.0 but it's actually just 2.0 with blue plastic
[EDIT: sorry for double post looks like i still had a draft saved on the phone and accidentally posted it now]
I think the app can be trusted, but which charger were you using? Was it connected to a USB port? I would suggest testing it further. Even the Current Monitor app can validate compliant USB C->A cables, so you could give that a shot as well.
-edit-
But how are you using the ammeter to check the draw here?
-edit2-
You said you saw it shoot over 2A. That shouldn't be happening when connected to a USB port. It shouldn't exceed 500mA.
-edit3-
Interesting.
roofrider said:
I think the app can be trusted, but which charger were you using? Was it connected to a USB port? I would suggest testing it further. Even the Current Monitor app can validate compliant USB C->A cables, so you could give that a shot as well.
-edit-
But how are you using the ammeter to check the draw here?
Click to expand...
Click to collapse
It was connected to a computer USB port as that is the only I plan on using it(I'm not gonna use it with an AC charger) I connected a short USB extender between the cable and the USB port and the extender has a cut 5v wire so I can connect the ammeter in series. Will test the current monitor app.
EDIT: It only went over 2A according to the Ampere app, at the same time the ammeter measured 260mA. This is the reason I'm questioning the app's reliability.
I'm curious to know how much the 5X pulls via that cable when connected to a 1A or 1.5A charger. If it stays within the amps the charger is rated to provide, then it should be good.
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
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annson08 said:
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
Click to expand...
Click to collapse
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Michaelmansour1997 said:
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Click to expand...
Click to collapse
No, you don't understand. What you're talking about is INPUT voltage of the wall charger. Take a look at our stock wall charger, it has an OUTPUT voltage of 5V and 9V. Qualcomm quick charge 2.0 enables our phones to be charged on higher voltage (up to 12V). In the case of our s7e, it's only 9V afaik. I'm not talking about ordinary phones, I'm talking about phones with quick charge 2.0. You can even look at our battery info in the settings, it displays that our battery is rated at 9V. Here let me take a screenshot of it.
Spoiler
Sent from my SM-G930F using Tapatalk
It's an interesting topic. The OP is correct about the voltage regarding supported devices, the input voltage is irrelevant, as the output is always going to be transformed to appropriate DC voltage by any supported device. The phone (and all battery powered electronics, such as laptops, watches, etc) can only accept DC, or they would probably explode.
As far as using a 9v battery, I'm skeptical you'd be able to effectively charge a phone with it. Yes it produces 9Vs, but are designed to be used at low amperage, 8 milliamperes (Fast chargers use 2 amps)...moreover, from what I've read they generally only store 400-1000 mah. Considering our phone batteries hold 3600 mah, it would make a single 9v battery fairly useless for charging. If you used several in parallel perhaps.
Or perhaps one of these at 3500 mah... http://www.batterymart.com/p-ulhd6vsc-ultralast-6v-heavy-duty-lantern-battery.html ...but it would have the same problem with being designed for low amperage. If the phone drew the voltage at highers amps, it would heat up the battery and probably lower the total charge it would provide.
I think turbo has the right idea. Alkaline 9v has about 600 mah so to fully charge a dead battery , you would need to parallel about 6 together. And it would probably take awhile. Cheap rechargeables often are between 7 and 8 volts so to be cost efficient would be difficult but the idea in general should work. Good outside the box thinking OP!
I... maybe....
I dunno maybe it's just me but...
...why!?
Just buy a rechargeable battery pack and be done with it. Honestly see no point or reason to want to do this outside of pure intrigue. Nobody is going to carry around several 9v batteries and even less likely to want to carry a lantern battery!