Develop Bugs

[Q] Optimal charging hardware for Note III

So the note III is the first smart phone to use USB 3.0 this raises some interesting questions. First of all I’m a neophyte with electrical “stuff (to use the technical term) so I apologize if some of this is easily answered (which would be great).
1. Since USB 3.0 can draw 5 Voltsdoes this mean that the current crop of car chargers won’t charge the Note III at full speed. All the car chargers I’ve seen are 2.1 Amps (some are dual port and claim 4.2 but that’s total, not in a single port). Does this mean that we’re locked to slower charging in the car?
2. For those of us with built in DC/AC inverters, would we be better served by using that plug and a wall USB charger? If so which one, my Note III will be shipping soon, so I’m assuming that 1000mA is still the maximum (I think USB 3.0 supports 900mA).
3. Will the note III charge slower using a USB 2.0 cable even with the best inverter/car adapter
4. Do we need a “charge only” cable (like http://www.amazon.com/Specialised-Micro-USB-Cable-Charging/dp/B0088HTYUE ) to achieve the best charging speed ?
5. In the event we can't get an optimal charger will the note III charge faster with a 2.0 charge only cable vs a standard USB 2.0 (I assume so but better to ask).

The move to USB 3.0 only affects charge rates connected to a PC. 2.x is limited to 500mA while 3.x is 900mA I think. Both standards use 5V, but 2A AC chargers often run a bit higher at 5.3V. The chargers don't directly adhere to either USB spec and basically trigger fast charge the same as before, by shorting out or putting a fixed resistance between the data pins. My old HP TouchPad USB 5.3V/2A charger with 2.0 cord charges my Note 3 just as fast as the Samsung 5.3V/2A adapter with USB 3.0 cord does. If you look closely, you'll notice that the "USB 3.0" Samsung charger doesn't actually have the extra 3.0 pins, it uses a 2.0 port. That's because for pure charging devices the standard doesn't matter, only the current and voltage rating and that it shorts the data pins.
Sent from my SM-N900T using xda app-developers app

CalcProgrammer1 said:
The move to USB 3.0 only affects charge rates connected to a PC. 2.x is limited to 500mA while 3.x is 900mA I think. Both standards use 5V, but 2A AC chargers often run a bit higher at 5.3V. The chargers don't directly adhere to either USB spec and basically trigger fast charge the same as before, by shorting out or putting a fixed resistance between the data pins. My old HP TouchPad USB 5.3V/2A charger with 2.0 cord charges my Note 3 just as fast as the Samsung 5.3V/2A adapter with USB 3.0 cord does. If you look closely, you'll notice that the "USB 3.0" Samsung charger doesn't actually have the extra 3.0 pins, it uses a 2.0 port. That's because for pure charging devices the standard doesn't matter, only the current and voltage rating and that it shorts the data pins.
Sent from my SM-N900T using xda app-developers app
Click to expand...
Click to collapse
Thanks for the response.
So I should use a "charge only" cable, correct?

bladehawk said:
Thanks for the response.
So I should use a "charge only" cable, correct?
Click to expand...
Click to collapse
If you want maximum charging out of a PC, yeah, otherwise it really doesn't matter. Also, if you use a fast charge kernel with fast charge enabled, it does the same thing by forcing the charger detection in software rather than in hardware. That said, you're still at the mercy of your USB port. USB 2.0 ports on PC's are only rated for 500mA usually and while you can overdraw from most without issue, you run the risk of overloading and at least triggering a software shutdown of the port (at worst, burning up the motherboard's power regulator for the USB 5V rail).
If you're plugging a cable into an AC adapter, it literally means nothing. All a "charge only" cable is is a USB A to micro B cable with the two data pins on the micro B side shorted together. Only the GND and +5V lines are wired through to the USB A connector which makes it only draw power, not data, and the shorting of the data pins makes it detect as an AC charger. Since the AC adapters short the data pins already, both cables look the same on the phone end when connected to an AC adapter. Same goes for a car adapter or external battery pack.
Technically, USB 2.0 and earlier, maybe 3.0 as well, are only supposed to let you draw 100mA. Devices must enumerate themselves to the controller and request the power limit be increased to 500mA. Many motherboards are pretty lenient about this so you can usually get away with plugging in a 500mA (or higher) load without telling the PC first but be aware it's breaking the specification and could be unsupported.

Some PC/laptop are BC 1.1 compatible. Meaning they can charge higher than the 450ma they usually do. I think it allows for up to 1.5a charging but don't quote me on that I forgot. I have a USB 2.0 hub that can use a wall charger and allows one device on any of the 4 ports (automatic sensing) to charge higher than usb2.0 specs. There are some hubs that allow all ports to do this. I am waiting for plufable technologies to update their 3.0 hub to do this.
sent from my sm-9005.

It is the normal case that the speed will be much slower when you charge a device such as your Note3 via USB than via DC Power Supply. USB is mainly designed for the communication. The standard charging current of many mobile phones is 1 A or higher. But the highest output current of USB cable is only 0.5 A which could not reach the source demand of a phone. Except for this, we do not recommend charging via USB because the unstable current output can easily reduce the battery life of your Note 3.

Handlewd said:
Except for this, we do not recommend charging via USB because the unstable current output can easily reduce the battery life of your Note 3.
Click to expand...
Click to collapse
Now that's something I never thought about. I would always plug my old phone into my computer when I got to work just to keep it topped off. Though lately, I'm plugging into a powered Belkin hub, so hopefully the current is more stable.
Now that I've got a new phone, I may rethink my charging strategy.

OnePlus Two Charging Analysis

Hi Guys
Today we will show you the charging analysis for the popular OnePlus Two smartphone.
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You should read a lot of OPT reviews from different site, but as a brand which offer chargers, we will only focus on the charging analysis for OPT2. We will test the original power adapter, suggest for how to quick charge your device, and help to pick up the correct alternative chargers. Here we go:
First, Let’s check the original power adapter and Usb to Type c cable:
The charger is regular 5V/2A power adapter, the specification on the charger is:
Model: AY0520
Input: 100-240V 50-60HZ 0.3A
Output: 5V/ 2A
The cable is interesting, Oneplus redesigned the usb port again,which make you never worry which side to insert, and the other port is USB type C, this cable can be used for charging and data transfer. The total length is about 3.5ft.
So this charger don’t support higher volt,(9V or 12V) and We can confirm that, even the OPT2 use the Qualcomm Snapdragon 810 processor, however, the OnePlus Two don’t support Quick Charge 2.0 Technology, We test with our chargers which support QC2.0, It just can get 5V volt, never get higher at 9V. You should read this news from different source, It’s a pity that they drop this amazing features, but We still want to give it a test for how the charging performance.
First we test the no-load voltage of their original power adapter:
I don’t connect any device to the charger, just use the ammeter to test the volt is 5.13V. It’s in the normal range ( the normal range for the charger should be 4.75V-5.25V, any chargers’ no-load voltage exceed this range will have problems), and then we make the oneplus two battery to 0% and begin our test: Here is our test result with original oneplus two 5v/2a power adapter, and usb type c cable:
Time Baterry Current
4:40pm-4:50pm 0％-17% From 1.89A to 1.85A
4:50pm-5:10pm 17%-33% Keep at 1.85A
5:10pm-5:40pm 33%-60% Still at 1.85A
5:40pm-6:40pm 60%-98%
6:40pm-6:50pm 98%-100%
From the above tablet, we can see, in the first 10 mins, the oneplus two get very fast charging, battery charged from 0%-17% in the first 10 mins, and we check the charging current, it is from 1.89A at first, then become smaller till to 1.85A. And then in the first 30 mins, it get about 33% battery. ( compare with the quick charge technology, about 60% battery in 30 mins, the oneplus two charging is slow). But the total charging performance is not that BAD, It take about 2 hours 10 mins to get the full charge (from 0%-100%). check the current tablet, before 60% battery, it get charged always @1.85A high current, and after 60%, the current will change smaller, from 1.85A to 1.83a and 1.79a, and smaller, because that change is fast, we don’t record every current.
Now we begin to test the charging performance with our chargers:
no-load voltage for tronsmart wall charger and car charger ( all of our tronsmart chargers are conform with the international standard)
Use the Tronsmart Wall charger and Tronsmart USB Type C cable to charge the Oneplus Two:
The charging current is the same as the original power adapter. The oneplus two don’t support QC2.0, so our chargers can’t give it faster charging speed, but at least,we offer the same good quality as the original power adapter.
In our testings, we found some interesting things:
1 If you make the screen on, the charging current will directly reduce to under 1amp, and with screen off, the charging current can reach 1.9a.
With screen off:
With Screen On:
2 If you use a low quality charger which can ‘t offer enough 5V volt, the OnePlus Two charging current won’t higher than 1amp, the charging speed will be super slow.
So how to make the charging speed faster on OnePlus Two, here are our suggestions:
1 Use the original or high quality power adapter and high quality USB type c cable;
2 Don’t use your phone all the time when you charge it, with screen on, we can see the charging current is really small.
Why Choose Tronsmart chargers:
All of Tronsmart Chargers are get certified by CE, ROHS, FCC and other certifications, all of our quick charges are certified by Qualcomm(you can find our name in the Qualcomm quick charge list), and we are also proud to be the featured quick charge brand in Qualcomm Official site. So You don’t need to worry the quality of Tronsmart chargers.
More and more flagship smartphone will support quick charge 2.0 technology, Samsung, Sony ,LG, Moto, all of these brand flag ship support quick charge, Tronsmart offer the world’s most abundant quick chargers. From 1 port usb wall charger to 5 port and from 1 port usb car charger to 4 port.
All of your families can get the fastest charging speed no matter what device they are using!
And more Tronsmart design a unique USB Typc C car charger for Oneplus two users, check it here:
Traditional, You need to prepare a high quality car charger, and high quality USB type C cable to charge your Oneplus Two in your car, but with Tronsmart USB Type C car charger, Never bother of this, plug our car charger , and charge your Oneplus anytime. also we offer another port which support quick charge 2.0 for your family’s Samsung, Sony, LG, Moto etc.
So above is our charging analysis for OnePlus Two, if you have any questions, feel free to leave comment below.
Tronsmart
Source: http://www.tronsmart.com/OnePlus+Two+Charging+Analysis

I am in trouble to find good USB A to C in my country (Thailand).
May be I need to wait until C tybe cable to be more popular.

ps000000 said:
I am in trouble to find good USB A to C in my country (Thailand).
May be I need to wait until C tybe cable to be more popular.
Click to expand...
Click to collapse
Is there anything you need here?

This is practically an ad for Tronsmart products

ZinoKad said:
This is practically an ad for Tronsmart products
Click to expand...
Click to collapse
Sorry if this make you feel uncomfortable, I just copy and paste from their website. and the first part of the review is helpful for me.
Eric

Good Job! Very professional! Look forward to more analysis such like this post.:good::good::good::good:

@GeekEric
What do you think of the below combination of components, will it achieve faster charging times for our oneplus 2 ?????
1.BlueRigger Rapid Charge Micro USB Cable - 6 Feet (does not support data transfer)
2.ImagineDesign USB Type-C Adapter : USB Type C To Micro USB
3.Amkette USB Wall Charger Duo for Mobiles & Tablets
I do not need your confirmation about any test results.
In theory, should the combination achieve faster charge times or not ??????

It charges from empty to full in 2 hours! why would anyone want faster than that? There's very little chance that a battery will be zeroed in normal use so charging times will be less anyway. Don't waste time and money trying to get a few seconds faster, just charge the thing overnight. Carry a power pack if you really need more than the battery can provide in a day.

My OPT needs 5h from 0 to 100%...
Gesendet von meinem ONE A2003 mit Tapatalk

Pasmero said:
My OPT needs 5h from 0 to 100%...
Gesendet von meinem ONE A2003 mit Tapatalk
Click to expand...
Click to collapse
Are you using the original cable and powerbrick? Some third party cables don't support higher currents, which slows down the charging.

GeekEric said:
Hi Guys
Today we will show you the charging analysis for the popular OnePlus Two smartphone.
You should read a lot of OPT reviews from different site, but as a brand which offer chargers, we will only focus on the charging analysis for OPT2. We will test the original power adapter, suggest for how to quick charge your device, and help to pick up the correct alternative chargers. Here we go:
First, Let’s check the original power adapter and Usb to Type c cable:
The charger is regular 5V/2A power adapter, the specification on the charger is:
Model: AY0520
Input: 100-240V 50-60HZ 0.3A
Output: 5V/ 2A
The cable is interesting, Oneplus redesigned the usb port again,which make you never worry which side to insert, and the other port is USB type C, this cable can be used for charging and data transfer. The total length is about 3.5ft.
So this charger don’t support higher volt,(9V or 12V) and We can confirm that, even the OPT2 use the Qualcomm Snapdragon 810 processor, however, the OnePlus Two don’t support Quick Charge 2.0 Technology, We test with our chargers which support QC2.0, It just can get 5V volt, never get higher at 9V. You should read this news from different source, It’s a pity that they drop this amazing features, but We still want to give it a test for how the charging performance.
First we test the no-load voltage of their original power adapter:
I don’t connect any device to the charger, just use the ammeter to test the volt is 5.13V. It’s in the normal range ( the normal range for the charger should be 4.75V-5.25V, any chargers’ no-load voltage exceed this range will have problems), and then we make the oneplus two battery to 0% and begin our test: Here is our test result with original oneplus two 5v/2a power adapter, and usb type c cable:
Time BaterryCurrent
4:40pm-4:50pm0％-17%From 1.89A to 1.85A
4:50pm-5:10pm17%-33%Keep at 1.85A
5:10pm-5:40pm33%-60%Still at 1.85A
5:40pm-6:40pm60%-98%
6:40pm-6:50pm98%-100%
From the above tablet, we can see, in the first 10 mins, the oneplus two get very fast charging, battery charged from 0%-17% in the first 10 mins, and we check the charging current, it is from 1.89A at first, then become smaller till to 1.85A. And then in the first 30 mins, it get about 33% battery. ( compare with the quick charge technology, about 60% battery in 30 mins, the oneplus two charging is slow). But the total charging performance is not that BAD, It take about 2 hours 10 mins to get the full charge (from 0%-100%). check the current tablet, before 60% battery, it get charged always @1.85A high current, and after 60%, the current will change smaller, from 1.85A to 1.83a and 1.79a, and smaller, because that change is fast, we don’t record every current.
Now we begin to test the charging performance with our chargers:
no-load voltage for tronsmart wall charger and car charger ( all of our tronsmart chargers are conform with the international standard)
Use the Tronsmart Wall charger and Tronsmart USB Type C cable to charge the Oneplus Two:
The charging current is the same as the original power adapter. The oneplus two don’t support QC2.0, so our chargers can’t give it faster charging speed, but at least,we offer the same good quality as the original power adapter.
In our testings, we found some interesting things:
1 If you make the screen on, the charging current will directly reduce to under 1amp, and with screen off, the charging current can reach 1.9a.
With screen off:
With Screen On:
2 If you use a low quality charger which can ‘t offer enough 5V volt, the OnePlus Two charging current won’t higher than 1amp, the charging speed will be super slow.
So how to make the charging speed faster on OnePlus Two, here are our suggestions:
1 Use the original or high quality power adapter and high quality USB type c cable;
2 Don’t use your phone all the time when you charge it, with screen on, we can see the charging current is really small.
Why Choose Tronsmart chargers:
All of Tronsmart Chargers are get certified by CE, ROHS, FCC and other certifications, all of our quick charges are certified by Qualcomm(you can find our name in the Qualcomm quick charge list), and we are also proud to be the featured quick charge brand in Qualcomm Official site. So You don’t need to worry the quality of Tronsmart chargers.
More and more flagship smartphone will support quick charge 2.0 technology, Samsung, Sony ,LG, Moto, all of these brand flag ship support quick charge, Tronsmart offer the world’s most abundant quick chargers. From 1 port usb wall charger to 5 port and from 1 port usb car charger to 4 port.
All of your families can get the fastest charging speed no matter what device they are using!
And more Tronsmart design a unique USB Typc C car charger for Oneplus two users, check it here:
Traditional, You need to prepare a high quality car charger, and high quality USB type C cable to charge your Oneplus Two in your car, but with Tronsmart USB Type C car charger, Never bother of this, plug our car charger , and charge your Oneplus anytime. also we offer another port which support quick charge 2.0 for your family’s Samsung, Sony, LG, Moto etc.
So above is our charging analysis for OnePlus Two, if you have any questions, feel free to leave comment below.
Tronsmart
Source: http://www.tronsmart.com/OnePlus+Two+Charging+Analysis
Click to expand...
Click to collapse
Good work.... I really liked your experiment [emoji1]
Sent from my ONE A2003 using Tapatalk

iamsuperuser said:
@GeekEric
What do you think of the below combination of components, will it achieve faster charging times for our oneplus 2 ?????
1.BlueRigger Rapid Charge Micro USB Cable - 6 Feet (does not support data transfer)
2.ImagineDesign USB Type-C Adapter : USB Type C To Micro USB
3.Amkette USB Wall Charger Duo for Mobiles & Tablets
I do not need your confirmation about any test results.
In theory, should the combination achieve faster charge times or not ??????
Click to expand...
Click to collapse
I have bought 2 of the cables. They are very nice. Until they break. Which usually happens within 6-8 weeks.
I usually stick to Anker or Kopi (Kopi is getting hard to find).
Anker PowerLine Micro USB (6ft) - T...m/dp/B012VZ7MUM/ref=cm_sw_r_awd_wKJ.vbGWMDDST
2.1A Micro USB Sync & Charging Cabl...m/dp/B009Z94PV2/ref=cm_sw_r_awd_OMJ.vbRP7CJP3
Hastily spouted for your befuddlement

Waterdroid said:
Are you using the originall cable and powerbrick? Some third party cables don't support higher currents, which slows down the charging.
Click to expand...
Click to collapse
Yup. Everything original OnePlus.

[Official] ✘ This is how we ROCK ✘ ~ OnePlus Homescreen set-up's!!
Wow what a pro writeup... Thanks for going in-depth!

So this points out a major issue: it takes 4 times as long to charge if screen is on. That means +8 hours until full! What the ****, oneplus... Hopefully this is something we can fix with a custom kernel.

iamsuperuser said:
@GeekEric
What do you think of the below combination of components, will it achieve faster charging times for our oneplus 2 ?????
1.BlueRigger Rapid Charge Micro USB Cable - 6 Feet (does not support data transfer)
2.ImagineDesign USB Type-C Adapter : USB Type C To Micro USB
3.Amkette USB Wall Charger Duo for Mobiles & Tablets
I do not need your confirmation about any test results.
In theory, should the combination achieve faster charge times or not ??????
Click to expand...
Click to collapse
No,it won't help.

Nice and in details.. thanks

Amazingly detailed OP well done.
I have noticed that the Nexus 6p and Nexus 5x also have the same USB-C v2.0 so my question is, why do the Nexus phones charge faster? I believe the Nexus 6p used a 5v/3A charger versus the 5v/2A OnePlus2 charger.
With this in mind, would the OnePlus2 charge faster if we were to use a 5v/3A charger? Since it's using the same USB-C v2.0 standard?
Thanks

THE_KINGDOM said:
Amazingly detailed OP well done.
I have noticed that the Nexus 6p and Nexus 5x also have the same USB-C v2.0 so my question is, why do the Nexus phones charge faster? I believe the Nexus 6p used a 5v/3A charger versus the 5v/2A OnePlus2 charger.
With this in mind, would the OnePlus2 charge faster if we were to use a 5v/3A charger? Since it's using the same USB-C v2.0 standard?
Thanks
Click to expand...
Click to collapse
That would be very nice to know...

albireox said:
That would be very nice to know...
Click to expand...
Click to collapse
Waiting for someone to test
Sent from my ONE A2003 using Tapatalk

Note7 Supports 25W USB-C Fast Charging - 50% in 30 minutes

The wall charger that comes with the Note7 is different than Samsung's previous adaptive chargers.
Here's mine from my Note5 which is the same used with the S7-series
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Here's the one from the Note7
And this is from Samsung's website. The terminology under fast charging is a bit muddled. I take it to mean that the charging tech Samsung's using in the Note7 is proprietary and if you use the charger with other USB-C or legacy Samsung devices it drops down to standard 2A charging like the previous adaptive charger.
Fast Charging
With new 25W USB-C Fast Charge technology, your battery can go from zero to up to 50% in about 30 minutes, so you can spend less time connected to an outlet. The 25W USB-C Fast Charge wall charger will charge the Galaxy Note7 and other USB-C devices without the Fast Charging feature as well, with up to a 2 Amp charging rate.
Rapid Charging
The Samsung Fast Charge Wall Charger plugs into any standard wall outlet via the included AC adapter. This Samsung charger has a standard output of 2 Amp to give your phone power at a much faster rate than your typical 1 Amp or 700mAh charger.
Flexibility
The Samsung Wall Charger also comes with a detachable USB to USB-C cable, which allows you to charge your phone from the USB port on your computer or other USB power source if you aren’t near a wall outlet. You can sync and transfer files with your Galaxy or any other smartphone using the USB-C cable.
http://www.samsung.com/us/mobile/mo...--detachable-usb-c-usb-cable--ep-ta300cwegus/​

This has been my confusing question. I assumed they would give it the more QC3 type rapid charge of some sort but wasn't sure. Glad its able to. I never use cabled charge but when I do, its because I need it stat. The more "stat" the better in that example.

This might be a thread hijack (if so, I can make a new thread), but anyone know if I'll get rapid charging if I were to plug the phone into my computer's USB 3.1 Type C port? (desktop PC)
Sent from my SM-G930W8 using Tapatalk

Devhux said:
This might be a thread hijack (if so, I can make a new thread), but anyone know if I'll get rapid charging if I were to plug the phone into my computer's USB 3.1 Type C port? (desktop PC)
Sent from my SM-G930W8 using Tapatalk
Click to expand...
Click to collapse
Unless your computer can pump out 12v2.1a ( hint: it likely can't) then no.
Sent from my LG-H901 using Tapatalk

It took over an hour for my S4 to get to 50% so this makes me happy

toastido said:
Unless your computer can pump out 12v2.1a ( hint: it likely can't) then no.
Sent from my LG-H901 using Tapatalk
Click to expand...
Click to collapse
Hard to say. I know the computer supports USB Power Delivery 2.0 through that port (using an onboard Intel USB 3.1 controller), but apparently the phone would need to support that as well (and I don't know what profiles of USB Power Delivery the controller supports).
http://www.phonearena.com/news/All-...pe-C-connector-and-USB-Power-Delivery_id71868

BarryH_GEG said:
The wall charger that comes with the Note7 is different than Samsung's previous adaptive chargers.
Here's mine from my Note5 which is the same used with the S7-series
Here's the one from the Note7
And this is from Samsung's website. The terminology under fast charging is a bit muddled. I take it to mean that the charging tech Samsung's using in the Note7 is proprietary and if you use the charger with other USB-C or legacy Samsung devices it drops down to standard 2A charging like the previous adaptive charger.
Fast Charging
With new 25W USB-C Fast Charge technology, your battery can go from zero to up to 50% in about 30 minutes, so you can spend less time connected to an outlet. The 25W USB-C Fast Charge wall charger will charge the Galaxy Note7 and other USB-C devices without the Fast Charging feature as well, with up to a 2 Amp charging rate.
Rapid Charging
The Samsung Fast Charge Wall Charger plugs into any standard wall outlet via the included AC adapter. This Samsung charger has a standard output of 2 Amp to give your phone power at a much faster rate than your typical 1 Amp or 700mAh charger.
Flexibility
The Samsung Wall Charger also comes with a detachable USB to USB-C cable, which allows you to charge your phone from the USB port on your computer or other USB power source if you aren’t near a wall outlet. You can sync and transfer files with your Galaxy or any other smartphone using the USB-C cable.
http://www.samsung.com/us/mobile/mo...--detachable-usb-c-usb-cable--ep-ta300cwegus/​
Click to expand...
Click to collapse
Is the Charger in Box QC 3.0 or 2.0 ?

ilordvader said:
Is the Charger in Box QC 3.0 or 2.0 ?
Click to expand...
Click to collapse
I'm guessing neither because Samsung didn't use Qualcomm's Quick Charge feature on the S7-series. Samsung's Adaptive Fast Charging seems to be proprietary and is used on both Exynos and Snapdragon phones. Hence the terminology in the product description for the adapter that says "The 25W USB-C Fast Charge wall charger will charge the Galaxy Note7 and other USB-C devices without the Fast Charging feature as well, with up to a 2 Amp charging rate." I take that to mean that Samsung's charger and cable aren't USB-C spec compliant and won't work beyond the standard 2A output with other devices including those using USB-C. Once the phone's out I'm sure there will be lots of threads/posts discussing what Samsung's interpretation of USB-C really is.

Wait a minute...25W charging rate, even with a middling 75% transfer efficiency, should charge the battery by 50% in 20 minutes. And at 75% eff (a good charger would be in the 80s), it would make the phone pretty hot, as it would be dissipating 6W in waste heat. That's twice the power of the Snapdragon running full tilt. I'll be interested to see what th real rate is.

The phone is NOT going to charge at 12V/2.1A/25W. Samsung is likely just "future-proofing" chargers for a little while or making them compatible with larger devices that need more power. Nothing new in regards to the Note7's charging capability.

My charger on the US T-mobile variant did not come with an adapter that lists 12V...

cbutters said:
My charger on the US T-mobile variant did not come with an adapter that lists 12V...
Click to expand...
Click to collapse
Nor did mine.

I'd like to know if anyone has tested a Samsung 25W charger with the Note 7. The fact that they included a 15W charger speaks to the contrary, but it's currently an unknown.

The Note7 is listed as a supported device if you pull up the 25watt charger on Samsung's website

Devhux said:
This might be a thread hijack (if so, I can make a new thread), but anyone know if I'll get rapid charging if I were to plug the phone into my computer's USB 3.1 Type C port? (desktop PC)
Sent from my SM-G930W8 using Tapatalk
Click to expand...
Click to collapse
Well for sure it doesn't support USB PD @ 29 W from the Macbook USB-C charger. Seems to only get 5-10 W out of it, and same from the Macbook itself.

Where did the 12V/2.1A/25.2W charger come from?
Mine came with a 5V/2A and 9V/1.67A charger.
Edit - so I did some research online. That charger was meant for the Galaxy Tab Pro S? Which functions more like a Windows 10 laptop than a tablet.
Are you sure the EP-TA300 is compatible with the Exynos Note 7?

A Chinese Website Chongdiantou has proven that both the Snapdragon 820 and the Exynos 8890 variants of Note 7 support USB Type-C Power Delivery and can handle up to 25W of power input.
I am not allowed to post outside links. You can google "实测：这几款USB PD充电器支持三星Note7快充-充电头网" and see the readings on the power monitor.

cbutters said:
My charger on the US T-mobile variant did not come with an adapter that lists 12V...
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Compusmurf said:
Nor did mine.
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same here!

cbutters said:
The Note7 is listed as a supported device if you pull up the 25watt charger on Samsung's website
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Hmmm... Dont know if I'd plug my Not 7 into that new Super fast charger as of now. It may charge it much faster but with a 50/50 chance of it exploding every charge is too risky for me.

I have these two. One is much larger then the stock Note 7 charger. Note 7 stock on the left and the fat boy on the right. Both came with USB-C cables.
Is the fat one on the right safe to use with the Note 7?

Type c charging cables

Hello all. I have a quick question. I have bought a type c charging cable that has just arrived, it was sent from in my country to my location in less then 3 days. Off ebay And after purchase I read about how type c charging cables can destroy your devices if you buy a knock off, or a cheap cable or not made properly, by any means this cable was 13.00 AUD. It's 3 meters and it looks very thick and quality looks good. It is generic though. No branding.... So I'm wondering if it would be okay to just use this as a charging cable, and use the original for File transfers. I also have a Spigen cable on the way but I do not want to wait to use this one. Is there any chance that this will be okay to use?... Attaching a photo of the cable

The htc 10 doesn't use USB charging; it uses Quick Charge 3.0.
USB charging has its standards, separate from the connectors and separate from Qualcomm's standards.
Qualcomm states that QC works regardless of cable and connector. However, the htc 10 is picky about the cable and I've not found a rhyme or reason for it. I have a Type C-to- A cable that won't QC but several micro cables that will with a micro-to-C adaptor.

Basically the cable must have a 56k ohm resistor in the type c connector which tells the phone how much power to draw to prevent over current. Usually this is signified by a longer plug and the resistor should be stated in the ad if you can remember where you bought it from. From eye balling the cable you photographed it looks fine. I think it's more of an issue with Nexus phones anyway since the 10 uses a different standard in order to maintain compatibility with qc3.0.

More accurately, the resistor tells the USB-C device that it's hooked up to a legacy "device". Type C to anything being legacy. Anything but type C weren't "designed to handle" 3A of current that the USB Power Delivery can output at 5V.
So if you have a Nexus 6P or a Pixel or whatever that uses USB PD:
if you use a type C to type A cable with a 56kOhm resistor, the phone is going to know that this is a legacy device and it won't attempt to draw more than the "Default USB Power" which is 5V0.5A for USB 1.0/2.0 and 5V0.9A for USB 3.x.
But of course the device will also look past it and see what output current the charger actually advertises it is capable of and then charges at that current the charger is capable of..
But, here's the big problem.
What if you use a type C to type A cable with a 10kOhm or 22kOhm resistor?
That cable is going to tell the device that it's
a) not connected to a legacy device (56kOhm resistor would mean legacy)
b) it IS connected to 5V3A or 5V1.5A (10kOhm/22kOhm resistor respectively) output.
It's going to try and draw 3A of current if the cable has a 10kOhm resistor in there, whether or not the charger can actually output that.
Danger here is that different chargers will respond to that differently.
The charger can either fail spectacularly (read: explode, catch on fire, something bad) or it will just trigger OCP (over current) and not charge if it has the protection or it will just try and cope with it delivering as much current as it can and potentially overheat and fail in some fashion.
Imagine hooking up your Nexus 6P or Pixel to your laptop with a "bad" type C to type A cable.. Those ports are not going to be able to handle that kind of power unless they're something special sauce.
For a little bit more cohesive explanation, read this
http://www.androidauthority.com/usb-type-c-and-3-1-explained-656552/
As for our device, we don't use USB PD. Some have said that the HTC 10 is compliant with it but I don't know if that's true or not.
However we use Quick Charge. Quick Charge doesn't look for resistors, it looks for the other chip inside the charger and talks with that chip, essentially doing a digital handshake before they initiate quick charging.
That prevents the charger from outputting anything higher than 5V unless the device specifically asks for it.
So, in theory, ANY data cable should be perfectly compatible with QC.
Data cable meaning that the D+ and D-, teh data, connectors are hooked up.
QC performs the digital handshake, and subsequent voltage/current adjustments, by talking across the D+ and D- conductors.
If you have a "charge only" cable or a PortaPow "data block" adapter, it means that only the V+ and V- connectors are hooked up and as a result QC chip in your 10 can't talk to the charger to negotiate the QC.
As for why some type C to type A cables don't support quick charge. I have no freaking idea.
I've got one cheap C-A USB 3.0 cable that I bought from ebay and it's a weird cable...
First time I tried charging it was in the car with a dual port (A) QC3.0 charger. Phone said slow charge, for faster results use the original charger. Didn't try again.
With the stock charger I'm testing at the moment, I first got 1.8A (after 1A>1.3A>1.8A over a minute). Unplug and plug it the other way around I got 1.7A and then it dropped to 1.4A. Third time I plugged it in the same way I plugged it the first time and now it said slow charge.. Plug it again the same way and now it charges.
Could it be that the cable either has a 10kOhm or a 22kOhm resistor in there? Maybe. Idk. Don't have means to test it right now, but I'll probably gut the cable later and measure it when I have time.
Moral of the story: come on guys, buy good quality cables from reliable brands for charging. They're not expensive.. Aukey, Anker, PortaPow, you name it. There's a lot of them out there.
I'm personally using the PortaPow cable for charging my 10, only 1 meter length available at this moment but if you want longer or shorter lengths, message them. They'll make them if there's enough interest.
http://www.portablepowersupplies.co.uk/portapow-charge-sync-usb-c-cable/

Thankyou for your help guys I've decided to wait for the Spigen charger

lagittaja said:
Moral of the story: come on guys, buy good quality cables from reliable brands for charging. They're not expensive.. Aukey, Anker, PortaPow, you name it. There's a lot of them out there.
I'm personally using the PortaPow cable for charging my 10, only 1 meter length available at this moment but if you want longer or shorter lengths, message them. They'll make them if there's enough interest.
http://www.portablepowersupplies.co.uk/portapow-charge-sync-usb-c-cable/
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Except that these guys don't make the cable that I need (or I just haven't been able to locate one).
I need a ~6-ft/2m cable with a 90-degree-to-the-front/back elbow on the USB Type C connector like the one shown here:
...and black...no goofy colors.

I thought I knew the correct cable to purchase (I only bought this phone 5 weeks ago and I need to buy 1-2 backup charging cables.
I always bought cables from Monoprice.com (for my M8 anyway) because they were decent quality, they had 6" lengths available, they were pretty cheap, and they had goofy colors (I'll take anything to break up my day a bit).
But now I am not sure which cable is correct. Is the USB version irrelevant with the HTC QuickCharge functionality? So I can get either v2.0, v2.1, or v3.0 USB-C to USB A?? Also, I will go to another vendor if need be, but most of the cables at this website do not state a resistance—just voltage and amps.
So this would be one I might get because it seems OK...
http://www.monoprice.com/product?c_id=103&cp_id=10303&cs_id=1030319&p_id=14933&seq=1&format=2
If it isn't showing the resistance should I shop someplace else?

Vmo x said:
Thankyou for your help guys I've decided to wait for the Spigen charger
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Why do you want to wait for Spige charger which is not QuickCharge 3.0 dedicated charger like your oroginal HTC OEM charger?
Buy an Aukey QC 3.0 chargers, they are very reasonably priced and high quality. Also, BlitzWolf produces a valid Type C cables with 56k resistor. I personally use them with Aukey and HTC charger and everything is perfect and very good quality.
syntropic said:
So this would be one I might get because it seems OK...
http://www.monoprice.com/product?c_id=103&cp_id=10303&cs_id=1030319&p_id=14933&seq=1&format=2
If it isn't showing the resistance should I shop someplace else?
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Here is the list of verified and proper Type C cables. I personally recommend BlitzWolf - metal connectors, braided cables, very good and robust quality.
https://docs.google.com/spreadsheets/d/1wJwqv3rTNmORXz-XJsQaXK1dl8I91V4-eP_sfNVNzbA/edit#gid=0

cavist said:
Here is the list of verified and proper Type C cables. I personally recommend BlitzWolf - metal connectors, braided cables, very good and robust quality.
https://docs.google.com/spreadsheets/d/1wJwqv3rTNmORXz-XJsQaXK1dl8I91V4-eP_sfNVNzbA/edit#gid=0
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Thank you! However, can you qualify the user of the word "proper"? What aspect makes them "proper"?
Sent from my HTC 10 using XDA Labs

Proper means they all have 56k resistor, just like jesus said in the bible. So they are fully compatible with HTC10 and can be used with any QuickCharger or USB PD charger without risk of drawing too much power resulting in explosion. 56k resistor is the main key here and mr Benson, a Google engineer working on devices using USB PD specs which *need* a proper 56k resistor Type C cable, tests himself various cables using a hardware tester and posting reviews about good and bad cables.

cavist said:
Proper means they all have 56k resistor, just like jesus said in the bible. So they are fully compatible with HTC10 and can be used with any QuickCharger or USB PD charger without risk of drawing too much power resulting in explosion. 56k resistor is the main key here and mr Benson, a Google engineer working on devices using USB PD specs which *need* a proper 56k resistor Type C cable, tests himself various cables using a hardware tester and posting reviews about good and bad cables.
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Except that this all deals with USB PD charging, not Qualcomm's Quick Charge, which is its own thing.
cf. https://www.qualcomm.com/products/snapdragon/quick-charge/faq
Q6: Does it matter what type of charging cable is used with a Quick Charge adapter?
A: Quick Charge is designed to be connector- and current-independent. Quick Charge is designed to be compatible with a variety of formats, including:
USB Type-A
USB micro
USB Type-C
Proprietary connectors
Quick Charge high-voltage operation is designed to minimize charging issues associated with long or thin cables, allowing for a superior charging experience, independent of cable type or cable current capability.
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cf. http://thewirecutter.com/blog/quick-charge-usb-c/
I don't like that I can't find specifics on how QC3 works exactly since I have a cable that breaks it.

Rolo42 said:
Except that this all deals with USB PD charging, not Qualcomm's Quick Charge, which is its own thing.
cf. https://www.qualcomm.com/products/snapdragon/quick-charge/faq
cf. http://thewirecutter.com/blog/quick-charge-usb-c/
I don't like that I can't find specifics on how QC3 works exactly since I have a cable that breaks it.
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Unfortunately you did not read the big post on this page along with the article about delivering power over usb cable.
Both QC and USB PD require cable with 56k resistor to work properly. Hence the cable for Google Pixel or HTC10 is the same. Each standard deliver power in its own way over the same cable.

cavist said:
Unfortunately you did not read the big post on this page along with the article about delivering power over usb cable.
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Rather than make accusations based on assumptions, you could point out what you think I missed. I did read all the posts and links and here is what I got:
As for our device, we don't use USB PD.
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As for why some type C to type A cables don't support quick charge. I have no freaking idea.
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cavist said:
Each standard deliver power in its own way over the same cable.
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"It's own way" -- correct. USB-PD requires 56k termination for legacy device compatibility. Our devices use QC, not USB-PD.
cavist said:
Both QC and USB PD require cable with 56k resistor to work properly.
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If this is true, it goes against Qualcomm's specs that I linked that you may or may not have read for comprehension. Qualcomm states that they have no/zero/nada/nicht/nill/null/zilch cable requirements for QC. Also, QC predates USB-PD. The two have nothing to do with each other.
More from the big post I allegedly did not read:
However we use Quick Charge. Quick Charge doesn't look for resistors, it looks for the other chip inside the charger and talks with that chip, essentially doing a digital handshake before they initiate quick charging.
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Do you have an authoritative source that shows that the 56k terminator is necessary for QC3 to work on the htc 10?
I cannot find it on Qualcomm's site or htc's site. Google Pixel and Nexus 6P sites are not authoritative sources for the htc 10 or Qualcomm Quick Charge.

I did not accuse of anything, I am not a prosecutor.
99% of cables used to charge your and mine HTC are USB A (2.0)to USB C cables. The resistor is needed so you will not draw to much current via USB A connector which is not rated for 3A. Lower value resistor will force to draw to much from USB 2.0 spec connector and cable. Simple as that. So your digital handshake between chips is worth essentially nothing if they will indeed greet and meet over cable that is not rated to pass a 3A high current which will lead to fry something.
I suggest to read the discussion in comments section on Benson Leung G+ profile. Do not get me wrong, I wasted my time to go all over it and I do not see point to go back couple of articles again just to point a few most important comments by Benson. You could do the same, because it does not matter if you believe me or not. Bottom line is, you need a 56k resistor USB A to USB C cable for HTC10. Same cable which was shipped to you by HTC in the box. If you do not believe, then take a sharp razor and disassemble your cable. They're cheap so you will get yourself a brand new one very fast.
So, check your oem cable, ask Qualcomm and HTC via mail why you need a cable with 56k resistor. Simple as that.

cavist said:
99% of cables used to charge your and mine HTC are USB A (2.0)to USB C cables. The resistor is needed so you will not draw to much current via USB A connector which is not rated for 3A. Lower value resistor will force to draw to much from USB 2.0 spec connector and cable. Simple as that. So your digital handshake between chips is worth essentially nothing if they will indeed greet and meet over cable that is not rated to pass a 3A high current which will lead to fry something.
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The conclusion you drew is faulty. The pull-up resistor is needed to protect legacy equipment; it has nothing to with Quick Charge or cables/connectors being "rated for 3A" (they aren't--chargers are).
cavist said:
I suggest to read the discussion in comments section on Benson Leung G+ profile.
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I have and they are all dealing with USB charging protocols, not Quick Charge.
cavist said:
Bottom line is, you need a 56k resistor USB A to USB C cable for HTC10. Same cable which was shipped to you by HTC in the box. If you do not believe, then take a sharp razor and disassemble your cable. They're cheap so you will get yourself a brand new one very fast.
So, check your oem cable, ask Qualcomm and HTC via mail why you need a cable with 56k resistor. Simple as that.
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So, no, you do not have an authoritative source for Quick Charge cable compatibility for htc 10.
Did you read the Qualcomm link I sent? It does not require the pull-up resistor. htc FAQ only says "buy our [only one, short, overpriced] OEM cable"; htc tech support never replied to my query.

Ok, it is no use to continue this further. Everybody will do as they want and will be happy. You can recommend cables without or with any other lower resistor and I will recommend with 56k as I did before that actually are working.
Still I can wait for your cable disassembly as last proof that I am completely wrong but I think that will not change anything at all in this discussion.

Gemini PDA picky about USB-C chargers?

My Google Pixel or ASUS chromebook chargers don't seem to work unless the pda is off. I'm disappointed that this device didn't implement USB-PD and that I can't charge from either side. What's the point of a standard connector if you need a proprietary power brick. MediaTek Pump Express was a poor choice.

I agree. So plugging into your charger when the Gemini is off WILL charge it?
I have a USB-C charger in my truck, and I will say that when my Gemini is plugged in it will hold the charge at whatever level it's at. It won't charge it, but at least power won't be depleted. Still disappointing, for sure.

dimex said:
I agree. So plugging into your charger when the Gemini is off WILL charge it?
I have a USB-C charger in my truck, and I will say that when my Gemini is plugged in it will hold the charge at whatever level it's at. It won't charge it, but at least power won't be depleted. Still disappointing, for sure.
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Yes, if my Gemini PDA is off-off, my Google Pixel USB charger does seem to charge it. I don't have any numbers, but I doubt it's using the higher voltage modes so it's probably a slow charge. The red charging light comes on after maybe a second. Same poor behavior using an Anker PowerCore+ 26800 USB-PD with J5 Create JUCX01 USB-C to USB-C cables (an expensive but highly regarded cable supporting 100W power delivery AND 10 Gbps transfers). My car's AOLIEKS 48W USB-C USB-PD cigarette lighter port adapter is also useless for the gemini PDA when using the 30 W USB-PD port with a JUCX01 cable. I'll try using the QC 3.0 USB-A port with Gemini-provided USB cable tonight.
None of my standard USB-C chargers seem to do anything at all when the Gemini PDA is on. As though the cable isn't even detected. This indicates a firmware issue in the charge controller, IMHO. I looked closely at the Gemini-provided USB cables and the USB-C plug seems maybe 0.5mm longer than my other USB-C cables, so maybe it's a physical thing but I doubt it.

rgmmm said:
Yes, if my Gemini PDA is off-off, my Google Pixel USB charger does seem to charge it. I don't have any numbers, but I doubt it's using the higher voltage modes so it's probably a slow charge. The red charging light comes on after maybe a second. Same poor behavior using an Anker PowerCore+ 26800 USB-PD with J5 Create JUCX01 USB-C to USB-C cables (an expensive but highly regarded cable supporting 100W power delivery AND 10 Gbps transfers). My car's AOLIEKS 48W USB-C USB-PD cigarette lighter port adapter is also useless for the gemini PDA when using the 30 W USB-PD port with a JUCX01 cable. I'll try using the QC 3.0 USB-A port with Gemini-provided USB cable tonight.
None of my standard USB-C chargers seem to do anything at all when the Gemini PDA is on. As though the cable isn't even detected. This indicates a firmware issue in the charge controller, IMHO. I looked closely at the Gemini-provided USB cables and the USB-C plug seems maybe 0.5mm longer than my other USB-C cables, so maybe it's a physical thing but I doubt it.
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I was adding a 6-outlet wall tap to the outlet near my bedside table today, and while consolidating chargers I plugged the Gemini's USB-C cable into the AUKEY 12W Dual Port Home Travel USB Wall Charger Adapter - Black charger I have. It charges the Gemini, whether it's on or off. Not sure about voltages or numbers either, but the Battery page in settings showed "Charging by AC" and the time remaining seemed pretty short.

There does seem to be some magic sauce with the included USB cable. Using that cable worked fine with my power bank, but not my car charger.

I've done some testing using a Pluggable USB-C meter (can't post links due to being new, it's on amazon).
Charging is only on the left port. (More on that later.)
Using the supplied charger + cable I get 8.8v at 1.35A (close to the 9v the charger has printed on the back, charger says it supports 12v according to the back but I guess the Gemini doesn't).
Using an Anker PowerPort+ (60w, one type-c and USB A ports) I get:
- Anker USB A to C cable: 5v (well, 4.78v), 1.8A
- Anker USB-C to C cable: Nothing. :/ (the pluggable adapter doesn't even turn on, presumably not seeing any negotiation to even turn on).
Also tried a few other USB C cables and power supplies (Apple, Chromebook) and they don't charge it or pass power.
While the left port is the only one that will charge, the Gemini will take power on the right hand port -- the amount varying by usage it seems (I've seen between 0.15A and 0.41A when worked hard), so presumably it is possible to take power from a hub which should mean the device stays alive for longer but won't charge.
I hope it's possible to add proper PD / type C charging in a software update, for me a huge advantage of type C is not needing to have different adapters for fast charging... (I'm a little confused because pump express claims to support USB PD on mediatek. c o m / features/pump-express (sorry mangled url because I can't post them...), not sure what that means in non-marketing speak as it obviously doesn't work).
Forgot to test with it turned entirely off:
- It does charge off the Anker USB-C charger via C-to-C cable, but only at 4.96v, 0.38A, i.e. you're going to be waiting a while for a charge. Makes me hopeful this is a software thing though.
---------- Post added at 09:51 PM ---------- Previous post was at 09:32 PM ----------
Replying to myself, but thought this was useful to point out:
psionfan said:
It does charge off the Anker USB-C charger via C-to-C cable, but only at 4.96v, 0.38A, i.e. you're going to be waiting a while for a charge.
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...which does lead to an interesting trick:
Turn it off, plug it to the type C charger, then it will continue charging at a low rate while on. Could be useful if you forget the right charger (which is totally something I see myself doing).

USB-C charging is a compatibility mess, and yes, it seems Gemini PDA is on the bad end of it. I have various
But I had an LG phone that couldn't reliably charge from a MacBook Pro USB-C power supply--and it seems that charger can't charge my Gemini at all. Two rather mainstream companies that can't manage to implement a standard and make it work right, Gemini can't make it work at all, isn't unique in having problems, but clearly on the bad end...
Sounds like the USB-C standard is badly designed.
-kb