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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.
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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.
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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.

USB-C To Type A cables Q and A

So with all these posts about USB-c to type a cables not being built to spec with the correct resistor, I figured I'd make a post for questions and answers
A few things..
1a. From what I have observed, do not trust what the phone says. If it says charging rapidly it doesn't necessarily mean its rapidly charging.
1b. If the phone says charging slowly or charging then that is a good indication that the cable is legit.. That is from what I observed. I do not take any responsibility if your phone dies.
I know that this point is..misleading since I said "do not trust what the phone says". But again..this is from what I've tested myself over the past days
2. What does charging slowly and charging mean? I really hope a Google dev or someone knowledgeable answers this
3. Download ampere to see how many amps are getting pulled when it is charging
4. This ties into point 1. If using OEM USB-c to type a cable it will say charging slowly. If a legit cable says that then it seems to be legit. Again.. Not my responsibility if your phone dies
5. There are different stages of battery charging. From 0-80% it is fast . once it hits a certain % it will slowly charge. This is by design for batteries
6. Good cables will use 56k resistors. Bad ones will use 10k resistors
7. Even though a traditional computer USB will only output 500ma max, if you plug in a device that wants 3a, like our phones, the port will give it 3a for a split second and can damage the port. A good cable will stop that with the resistance/resistor
Thats it for me.. I am not an expert but I have been playing with multiple cables and reading up on specs and want to give some answers to the questions I had..
Hope this gets sticked or something
I will update this post as more questions come in.
Sent from my Nexus 6P using Tapatalk

From what I remember, charging slowly is if it's charging < 1A, charging is between 1A - 2A, and charging rapidly is 2A >. Relying on your phone to tell you if you are charging rapidly isn't the end all to see if the cable is correct, as many can deliver 2.4A which will show as rapid charging, but true rapid charging is 3A.

geoff5093 said:
From what I remember, charging slowly is if it's charging < 1A, charging is between 1A - 2A, and charging rapidly is 2A >. Relying on your phone to tell you if you are charging rapidly isn't the end all to see if the cable is correct, as many can deliver 2.4A which will show as rapid charging, but true rapid charging is 3A.
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That is true but from playing with cables it seems to matter.
When using the same port with non-certified cables it will say charging rapidly. It shouldn't since the port on a computer is only really designed to handle 500ma. The phone is requesting 3a and the cable allows that since it has only 10k/incorrect resistors
The good cable with 56k core will say "hey, the port only allows 500ma, resist me".. This is only from what I've tested with multiple cables
Again like in my OP... This is from my observations
Sent from my Nexus 6P using Tapatalk

Can I use regular 2A charger with N6p?

There are no many adapters on the market and I couldn't find original huawei adapter. Can I use a regular adapter (samsung 2A for example) with my Nexus?
Sent from my Nexus 6P using xda premium

Yes, but you must use a certified cable. Check Benson Leung's reviews on Amazon to find a good one or use the cable provided in the box.
However you can buy original charger from Google Store or a valid alternative from Amazon like this:
http://www.amazon.com/Charger-Type-..._1_1?s=wireless&ie=UTF8&qid=1461623244&sr=1-1
If I understand correctly some articles USB A chargers doesn't support type-c power profile, so the phone will charge at a constant rate without lowering amperage to be gentle with the battery. Furthermore the quick charge is a very useful feature, so I suggest you to buy a compatible charger.

Absolutely. Just be aware that charging of the Nexus 6P/5X is limited to 1.5A over a proper USB Type-A to USB Type-C cable. With a USB Type-C to USB Type-C cable and a Type-C charger, it charges at up to 3A (as it does with the official charger).
So if you're worried about speed of charging, you may want to get yourself a new USB Type-C charger, as a Type-A charger will take about twice as long! (a 3A USB Type-C charger takes about 90 minutes) Personally, I just have a USB Type-A charger by my bed, since it will definitely finish charging while I sleep. Then I keep the original charger in my work bag, in case I need to quickly recharge during the day!
frezd91 said:
If I understand correctly some articles USB A chargers doesn't support type-c power profile, so the phone will charge at a constant rate without lowering amperage to be gentle with the battery. Furthermore the quick charge is a very useful feature, so I suggest you to buy a compatible charger.
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I don't know if that's the case, but if it is, I'm not sure it matters. With the USB Type-C charger it's drawing 3A and then lowers as the battery gets full, but I don't know how low it gets. Whereas a USB Type-A charger will be drawing 1.5A maximum, so it may not even need to lower.

Any good USB type A charger that you can recommend?
I Have a good opinion about Samsung adaptive charger that my wife uses with her note edge.
Sent from my Nexus 6P using xda premium

I am partial to Anker brand chargers. I would suggest the PowerPort 2 (as I own a couple), it is capable of charging two devices at up to 2.4A each (while the Nexus 6P can only draw 1.5A, iPads can draw the full 2.4A because of their proprietary tech). But as you can see on the Anker website, they have a ton of different options!

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?
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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.

USB Wall Outlet Charger

I'm looking at avoiding powerbricks in my house. I've been upgrading the outlets in my house to USB's simular to this: https://www.lowes.com/pd/Legrand-Radiant-15-Amp-Tamper-Resistant-Outlet-3-1-USB-White/50253183
would I still be able to charge my phone and if so how fast? This would be the pain reason why I don't get the 6t and end up with a pixel or something.
thanks.

I have a similar setup in my kitchen and had a 3T. You can definitely charge your phone using an outlet like that and USB A to USB C cable, but it will charge slower than if you were using the wall plug and cable that come in the box with the phone. In my understanding the fast charging through VOOC/Dash charging is enabled by the wall plug, which does the heavy lifting of converting the power. This approach is supposedly better for the long term battery life. It definitely keeps the phone cooler and running smoother if you use it while charging. That said, I doubt that charging through a non-OP charger is bad for the phone or battery. It will just take longer.

How much slower? I think I set this thread up wrong, Im sorry.

Sorry I don't have any metrics. I mostly used the charger that came with my 3T. I'd say if you want the phone mostly charged in a short amount of time you need to use the charger that comes with the phone. If you aren't going to be using it for a while you can use any other USB C cable or charger you have available.