USB 3.0 and Wall wart - Galaxy Note 3 Q&A, Help & Troubleshooting

All of my previous phones' chargers have been like 1A and usb 2.0. The note 3 quite obviously differs in both of those respects. Now, I know that I can charge my note 3 using all my old chargers no problem, even if it's a little slow. But, I've got two questions.
1. Does the usb 3.0 allow more current to the phone or just faster data transfer? i.e. Am I losing anything by using the note 3 wall wart with a usb 2.0 cable?
2. If a usb 2.0 will still deliver the same amperage: Say I left the 2A charger with a usb 2.0 lying around and someone with a less powerhungery phone comes along and plugs in, will that damage their device?
Any help is much appreciated.

Tyfighter said:
All of my previous phones' chargers have been like 1A and usb 2.0. The note 3 quite obviously differs in both of those respects. Now, I know that I can charge my note 3 using all my old chargers no problem, even if it's a little slow. But, I've got two questions.
1. Does the usb 3.0 allow more current to the phone or just faster data transfer? i.e. Am I losing anything by using the note 3 wall wart with a usb 2.0 cable?
2. If a usb 2.0 will still deliver the same amperage: Say I left the 2A charger with a usb 2.0 lying around and someone with a less powerhungery phone comes along and plugs in, will that damage their device?
Any help is much appreciated.
Click to expand...
Click to collapse
1. USB 2.0 and 3.0 charge the same. The extra pins are only for data.
2. No problem. Devices only pull as much current as they need.

Related

Is there a way to see how many amps drawn with different AC chargers?

Edit: Crap meant to put in Q&A section. Could a mod please move?
I've found a few apps that are supposed to show the amps but everything seems to either always show 1amp or can't read anything and shows 0 amps. I have a kill-a-watt ez P3 but it's showing 0.16 amps being drawn with the three 2 amp rated AC chargers I have, so that doesn't seem to be of use.
Does anyone have any root specific ways to find this more accurately or any suggestions not app specific to figure this out?
Edit: Crap meant to put in Q&A section. Could a mod please move?
reTARDIS said:
Edit: Crap meant to put in Q&A section. Could a mod please move?
I've found a few apps that are supposed to show the amps but everything seems to either always show 1amp or can't read anything and shows 0 amps. I have a kill-a-watt ez P3 but it's showing 0.16 amps being drawn with the three 2 amp rated AC chargers I have, so that doesn't seem to be of use.
Does anyone have any root specific ways to find this more accurately or any suggestions not app specific to figure this out?
Edit: Crap meant to put in Q&A section. Could a mod please move?
Click to expand...
Click to collapse
have a look here http://forums.androidcentral.com/verizon-galaxy-nexus/150632-app-tell-you-your-ma-charging-rate.html
Galaxy charging current.
noideaforusername said:
Galaxy charging current.
Click to expand...
Click to collapse
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
reTARDIS said:
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
Click to expand...
Click to collapse
It might be Samsung who limiting the charging of other cables or AC chargers :silly:
reTARDIS said:
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
Click to expand...
Click to collapse
Samsung uses a voltage divider and signals the presence of their own charger by sending 1.2-1.3 V across the D+ / D- pins, this is similar to what Apple does with 2.0 or 2.8 V across the pins for various USB chargers they've shipped over the years. This signaling is essentially Samsung's proprietary tablet charging signaling which they've employed on the Galaxy Note 2 and now SGS4, in fact the two use the same exact charger, so it's worth tossing out your old ones and getting the appropriate one to take advantage of the faster charging
rubenswing said:
Samsung uses a voltage divider and signals the presence of their own charger by sending 1.2-1.3 V across the D+ / D- pins, this is similar to what Apple does with 2.0 or 2.8 V across the pins for various USB chargers they've shipped over the years. This signaling is essentially Samsung's proprietary tablet charging signaling which they've employed on the Galaxy Note 2 and now SGS4, in fact the two use the same exact charger, so it's worth tossing out your old ones and getting the appropriate one to take advantage of the faster charging
Click to expand...
Click to collapse
My iPad and some $15 brand called "Tech & Go" are both rated at 2.1a and according to Galaxy Charging Current they're charging at the same full 1.9a when using a proper shield cable.
Now my biggest challenge is finding a car charger that can do 1.9a as that's my biggest issue currently. When Google Music All Access streaming and GPS going with the screen on the chargers I've tried so far cannot even keep up with the power drain or just barley keep up. I need the full 1.9a in the car if I ever want to do those functions AND charge my battery up.
Anyone know of a car charger that'll do the 1.9a on the S4?
reTARDIS said:
Anyone know of a car charger that'll do the 1.9a on the S4?
Click to expand...
Click to collapse
Verizon has a dual outlet car charger that says it's 2 amps. The questions I cannot answer about it are:
- Does it give 2A through one USB port, or is it limited to 1A + 1A.
- Will the S4 recognize it and allow itself to draw 2A, or will it treat it like other "unrecognized" chargers and limit draw to 500mA.

[Q] Recharge time > 8 hours?

Hey all,
I've been using my N10 for a week now and am wondering why and if it's normal for the tablet to require 8+ hours to recharge?
I'm plugging it into the wall using a generic USB cable and non-Samsung power block. Should that matter at all?
Signed 'confused...'
Yes, the charger matters. The stock wall charger is at 2Amps, while a normal USB connection is at 0.5Amps, for example. All devices will charge more slowly on lower amperages, but since the battery of the Nexus 10 is so huge (9000mAh - about double your average laptop), charging it from 0 to 100 will be dreadfully slow, if you're not using a proper charger.
1. Are there other wall chargers with higher Amp output that are safe to use w/ the N10?
2. Is there any long term damage to the battery using a higher or lower Amp charger?
Another issue is if the charger is made for an Apple product it doesn't short the data pins so the Nexus doesn't see it as a high amperage power supply and only pulls .5 amps.
Use the OEM Samsung charger or get one of these:
Ventev r2200 AC Travel Charger, Dual 2A USB Port 110-220v With MicroUSB Cable
http://www.amazon.com/dp/B00BSC7FW0/ref=cm_sw_r_an_am_ap_am_us?ie=UTF8
And if you want a it to charge even faster, use a pogo cable.
Original Pogo Cable for Google Nexus 10 (25% Faster Charge) - MAGNECTOR
http://www.amazon.com/dp/B00D7NZLK6/ref=cm_sw_r_an_am_ap_am_us?ie=UTF8
Sent from my SPH-L710 using Tapatalk 2
garberfc said:
1. Are there other wall chargers with higher Amp output that are safe to use w/ the N10?
2. Is there any long term damage to the battery using a higher or lower Amp charger?
Click to expand...
Click to collapse
Higher than 2.1 amps? Not commercially that I'm aware of, though you could always jerry rig some contraption to deliver more.
The problem is, however, that the device will not draw the extra power. A device will draw the power it can use, and no more. I haven't tested what the draw is on my Nexus 10, but on my Note 2, it never draws more than 1.8 amps (although that reading may be a little inflated and it really only draws 1.5 amps). I suspect it's more or less the same with the N10 and the stock USB cable and Samsung 2.0 amp charger. So if you went nuts and jerry rigged a 50 amp power supply to the device, it would still only draw 1.5 amps.
Note that the draw can be affected by the USB cable you use. I've seen some USB cables draw less than 500mA where the stock Samsung USB cable draws 1.8 amps.
Bottom line is that you're not going to find a wall charger above 2.1 amps as far as I know, and even if you did, it wouldn't charge the Nexus 10 any faster. The problem is what you identified in your original post -- using some plain vanilla 500mA (0.5 amp) micro USB charger that you've had lying around the house for the past several years and assuming that it should charge just as well as the stock Samsung charger. It won't, as you discovered -- the N10 will only draw about a third of what it's capable of drawing from such a charger.
Be careful buying 2.0/2.1 amp chargers from Amazon or wherever, particularly if they're identified as Samsung chargers. They're almost always counterfeit, and no better than the 500mA chargers I mentioned above.
You might also want to look into the POGO charger cable because it allows the Nexus 10 to draw virtually the full 2.0 amps from the charger rather than 1.5.
JasW said:
Higher than 2.1 amps? Not commercially that I'm aware of, though you could always jerry rig some contraption to deliver more.
The problem is, however, that the device will not draw the extra power. A device will draw the power it can use, and no more. I haven't tested what the draw is on my Nexus 10, but on my Note 2, it never draws more than 1.8 amps (although that reading may be a little inflated and it really only draws 1.5 amps). I suspect it's more or less the same with the N10 and the stock USB cable and Samsung 2.0 amp charger. So if you went nuts and jerry rigged a 50 amp power supply to the device, it would still only draw 1.5 amps.
Note that the draw can be affected by the USB cable you use. I've seen some USB cables draw less than 500mA where the stock Samsung USB cable draws 1.8 amps.
Bottom line is that you're not going to find a wall charger above 2.1 amps as far as I know, and even if you did, it wouldn't charge the Nexus 10 any faster. The problem is what you identified in your original post -- using some plain vanilla 500mA (0.5 amp) micro USB charger that you've had lying around the house for the past several years and assuming that it should charge just as well as the stock Samsung charger. It won't, as you discovered -- the N10 will only draw about a third of what it's capable of drawing from such a charger.
Be careful buying 2.0/2.1 amp chargers from Amazon or wherever, particularly if they're identified as Samsung chargers. They're almost always counterfeit, and no better than the 500mA chargers I mentioned above.
You might also want to look into the POGO charger cable because it allows the Nexus 10 to draw virtually the full 2.0 amps from the charger rather than 1.5.
Click to expand...
Click to collapse
Listen to this guy.
@JasW - Wow, thanks for the information / education. It makes a LOT more sense now.
Thanks again, F
@Gearhead_ENG - Thanks for the links! I'm going to go home and scrounge through all my old chargers and see if I have more 2Amp chargers. If not, I'll be following the links again to purchase...

Difference in charging speed with different chargers?

Hi,
I was wondering if using a 2A charger with a normal Micro USB cable will charge my Note 3 as fast as the same charger with a Micro USB 3.0 cable?
Considering that USB 3.0 only delivers a higher output compared to 2.0 when plugged into a PC, I guess it makes no difference when using wall chargers?
Am I right ?
Thanks in advance,
Ben
USB from a PC will always be less than a dedicated charger whether it is usb 2 or 3. A 2 amp charger is what I use but also pay attention to the lead as some are far better at handling higher currents than others as I found out trying various leads whilst running the app at https://play.google.com/store/apps...=organic&utm_term=galaxy+charging+current+apk
Sent from my SM-N9005 using Tapatalk 4
The phone detects if you are using a wall or usb charger, the second is considerably slower. Some usb chargers cheat to seem wall chargers so charges much faster.
What if I use a micro USB cable that is attached to a wall adapter plug, will it still charge fast on note 3?
Divine1604 said:
What if I use a micro USB cable that is attached to a wall adapter plug, will it still charge fast on note 3?
Click to expand...
Click to collapse
Charging is not depend on USB 3.0 or 2.0, it acts differently only while transferring data. Otehrwise for charging both works similar.
The stock wall adapter has 2Amp output and I’ve a power bank with same output and the Power Bank provided with a short USB 2.0 cable and with both it takes same time to full charge. So no issues with the cable.

Charging speed question (amps related)

So we just upgraded to Note 3 from our galaxy 3 (wife and I)...
I noticed the charger is a 2 amp charger compared to the SGS 3's 1 amp.
I started reading some threads here and found out the USB 3.0 cable will not charge the phone faster unless it's plugged into the computer.
Apparently the PCM also limits the phone to charging at 900ma. (not verified)
so I'm curious now.... at what amps does this phone charge? I'm trying to get a spare charger to keep in the car, and also trying to get a usb car charger if I can benefit from the 2.1 amp one instead of the 1 amp one that's in there now....
Can anyone tell me if I should get a 2.1amp charger or stick with 1 amp chargers as the spares if it'll still charge at 900ma?
I'm using USB 2.0 cables btw. (unless I can charge faster with the USB 3.0 when plugged to a car charger or the wall, which I apparently won't from my research here)
While I await for responses, I will plug the charger into my voltage/amp reader and we'll see how much power is being drawn, which might give an idea as to how many ma it's charging at.
For whoever that wants to know this information, these are my findings from my meter that is able to measure how much power is being drawn (kill a watt P3)
with the stock charger and USB 2.0 cable (3.0 made no difference) the phone will charge at 900ma with the screen on. If the phone is shut off, or screen is off, it goes to 1500ma. Very steady at those.
with the SGS3 charger that I had, it's a constant 900ma whether screen is on or off... (1.0 amp charger)
now I guess I will have to see if this is the case with any 2.1 amp charger, or if it's specific to samsung's charger with snapdragon's quick charge feature. I believe only certain chargers allow use of this.
I don't know, I'm getting 1800mA by using stock wall charger with USB3 cable and 450 with USB2 cable. I know GS3 would charge at faster rate when using original Samsung wall charger and cable, which had data lines shorted, not sure if it's the same with Note3.
I don't remember for sure, but I think charging rate from computer was pretty much the same 450mA regardless of USB3 or USB2 port or cable. I remember this because I was surprised they didn't take advantage of higher power ratings with USB3, but maybe it was just my particular setup. I used application that shows charging rate, so all is with phone on, but it makes perfect sense, about 2 hours from 0 to 100% charge, if you allow some extra time for trickle charge at the end, losses and usage.
pete4k said:
I don't know, I'm getting 1800mA by using stock wall charger with USB3 cable and 450 with USB2 cable. I know GS3 would charge at faster rate when using original Samsung wall charger and cable, which had data lines shorted, not sure if it's the same with Note3.
I don't remember for sure, but I think charging rate from computer was pretty much the same 450mA regardless of USB3 or USB2 port or cable. I remember this because I was surprised they didn't take advantage of higher power ratings with USB3, but maybe it was just my particular setup. I used application that shows charging rate, so all is with phone on, but it makes perfect sense, about 2 hours from 0 to 100% charge, if you allow some extra time for trickle charge at the end, losses and usage.
Click to expand...
Click to collapse
and how did you measure this 1800mA?
razorseal said:
and how did you measure this 1800mA?
program is called galaxy charging current, you can get it in the play store.
Click to expand...
Click to collapse
You can't compare that app to a meter that shows you the actual current being drawn
Sent from my SAMSUNG-SM-N900A using Tapatalk
why not? How do you think your meter is working? Phone has similar IC. How did you come up with your numbers first of all? I thought you plug Kill a watt into outlet and it shows what the charger is using at 110v and at about 10 watts(or is it 220-240v for your location), your unit maybe at the limit of accuracy, since the amperage would be somewhere around 100mA, where your device is designed more for larger power consumption like fridge or TV running 300-1000watts and few amps. Is your unit somehow capable of measuring what the charger is outputting and if so, how?
BTW you can't get more than 900mA from PC even over USB3, thats the max limit.
I checked again: galaxy S3 wall charger is giving me 600mA, Note3 charger with USB2 cable gives me 1200mA and Note 3 charger with USB3 cable pumps out 1800mA, computer USB gives 450mA regardless of computer port, but there is something wrong with the USB3 cable that I got, is not connecting properly and I have to wiggle it to connect so maybe bad cable is the reason I don't get higher charge rate from PC USB3.

Quick Charge specs? Outlet?

So what do we call the "Quick Charge" that was used for the Nexus 6P? I know it wasn't the same as the quick charge in other phones at the time and it was kind of proprietary when it came out.
The reason I ask is because I need a new charger, but I was curious if there was a wall outlet (with usb ports) that would do the same thing.....Most of the wall outlets say 2.1amp 3.1amps or 4amps, which I assume is divided between the 2 ports if both are in operation. I also have a Nexus 9 so I'd like to be able to charge that.
Any tips or info on what specs I need to look for?
GatorsUF said:
So what do we call the "Quick Charge" that was used for the Nexus 6P? I know it wasn't the same as the quick charge in other phones at the time and it was kind of proprietary when it came out.
The reason I ask is because I need a new charger, but I was curious if there was a wall outlet (with usb ports) that would do the same thing.....Most of the wall outlets say 2.1amp 3.1amps or 4amps, which I assume is divided between the 2 ports if both are in operation. I also have a Nexus 9 so I'd like to be able to charge that.
Any tips or info on what specs I need to look for?
Click to expand...
Click to collapse
You can look over in the Accessories sub-forum where there is plenty of charger and cable discussion, but basically the 6P does not support the quick charge standard and ANY charger or cable that uses a USB-A port will NOT rapid charge your phone. You need a charger that either has a USB-C female outlet or integrated (non-removable) USB-C cable that supports the USB-C 5V-3A standard. That is the only way the phone will rapid charge. The N9 does not support the quick charge or turbo charge standards either. Mine came with 1.5A charger. You just need a good 5V charger that puts out at least 1.5A and the tablet will safely limit the input amperage. Since you have two devices to charge, you may consider a charger that has both a USB-C and USB-A port.

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