yashsingh1/xdaforums huggingface dataset:
[Nexus 6P Accessories] dwswager:
Without knowing all the conditions of the test, it is impossible to say.

The thing to understand is the 15W 5V/3A specification of a charger is the rated output. Voltage is the FORCE and Current is the FLOW. When charging the battery, the system will maintain a relatively steady voltage, but the drawn current (amps) will drop over time as the internal resistance goes up (V=IR). Merely increasing the amps of the charger provides only minor improvements in performance toward the end of the charging cycle.

The typical "Fast Charging" solution is to use more force (higher voltage) to overcome the resistance. This is why Qualcomm Quick Charge uses 5V, 9V and 12V instead of a steady 5V.

Here is a typical Li-ON charge curve.

[IMG="Charge Curve"]http://batteryuniversity.com/_img/content/ion1.jpg[/IMG]
[Nexus 6P Accessories] tietherope:
Yeah, I know chargers slow down. It just seemed that the drop off was rather large and I'm wondering if anyone knows if that's normal. The Tronsmart reached 2511mA at 40% battery, but only 1833mA at around 63% battery. That's a 27% drop.

However, looking at the Quick Charge 2.0 home page (I know the Nexus does not use this), their touted measurement is for a charge up to 60%, so maybe that is where the first big drop off happens.
[Nexus 6P Accessories] dwswager:
Allowing for some peculiarity in the charger itself, yes the dropping amperage is normal. It will eventually go asymptotic toward zero as the charging cycle ends.

The one I find a little odd is the LG charger. At 55% charge it's putting out about 2639mA while at 41% it is only putting out 1241mA with about a 5 degree temperature difference.
[Nexus 6P Accessories] yblaser:
Not quite correct. What is typically referred to as the "charger" is really just a power supply. The battery charging circuitry is built into the phone. The higher voltage used by the QC and USB-PD is just to deliver more power through the USB cable while not exceeding 3A. Inside the phone, the battery is never going to see more than 4.2V.
[Nexus 6P Accessories] tietherope:
Thanks for the confirmation.

The LG charger is actually doing 2642mA at 42%. The text and preview image show one thing, but when you open the image, it loads the pic for the Aukey charger.
[Nexus 6P Accessories] dwswager:
True. My simplification of the process.
[Nexus 6P Accessories] kellybrf:
fyi, [MENTION=6986419]Tronsmart[/MENTION] provided me with the type c car charger for review and my nexus 5x came in today. the qc port works as expected with my nexus 6, and i can confirm that the type c end will register as rapid charging on the 5x. the fixed type c and included usb to micro usb cable are both very thick, and all in all the charger is well put together. id highly recommend this charger to anyone needing one as it will support both older and the next generation devices. though it doesnt provide the full 15W that the nexus wall chargers do, its apparently putting out enough for the phone to consider it rapid charging.
[Nexus 6P Accessories] Bigal77:
Hmmm although many are getting the rapid charging signal on USB a and we know that it's not really rapidly charging.

I think I'll stick with my quick 2.0 charge for now and hopefully compare the oness that will certainly release soon providing 15watts
[Nexus 6P Accessories] init_dot_t:
Can you share where people are, "getting the rapid charging signal on USB a?"
[Nexus 6P Accessories] Bigal77:
Ive read every single thing these past few days, I forget where.

My best guess is droid-life. They did a decent job testing a bunch of chargers, and I believe they got that rapid charging signal on a few of them (despite them being normal chargers that were not giving great results)

---------- Post added at 02:57 AM ---------- Previous post was at 02:53 AM ----------

This is the quote from the droid life article

OnePlus Adapter (5V/2A): Registers as “charging rapidly” on Nexus 6P. (Couldn’t test on 5X.)

aaaaand the article

http://www.droid-life.com/2015/10/19/nexus-6p-nexus-5x-quick-charge/#more-176165

so it wasnt on a type a...but a oneplus 2amp charger when we know it needs 3 amp
[Nexus 6P Accessories] init_dot_t:
http://www.droid-life.com/2015/10/19/nexus-6p-nexus-5x-quick-charge/

So far I haven't seen anything other than the OnePlus wall adapter bring up "Charging Rapidly" with a usb a to c cable.

---------- Post added at 10:01 PM ---------- Previous post was at 09:58 PM ----------

The OnePlus is a USB type A adapter.
[Nexus 6P Accessories] kellybrf:
we don't know it needs 3a, all we know is that the Google charger is 3a. in fact, based on the tronsmart and oneplus results I think we can assume we don't quite need 3a to get rapid charging. obviously a few chargers are putting out enough to rapid charge the phone as I doubt its a glitch in the sw
[Nexus 6P Accessories] init_dot_t:
That's why I'm just going to order the tronsmart car charger. I know its 2.4a but either way... I drive 4 miles to work and back. I'm just going to use it for the "I'm running home to pickup my wife and go out" fast charge to wherever we are going.
[Nexus 6P Accessories] Bigal77:
Definitely worth picking up
[Nexus 6P Accessories] ylexot:
"Rapid charging" is a buzzword. It doesn't actually mean anything other than faster than normal USB. What you really want to know is what is the maximum charging rate for the phone. All we know for certain is that it can handle 5V/3A. It's possible that that it can actually handle more amperage, but without a charger capable of supplying it, we just don't know.

It's like having a car that can go 200mph. What is "driving rapidly"? Is it only 200mph or is 150mph still driving rapidly? The police would say that anything over the speed limit is driving rapidly. ;)
[Nexus 6P Accessories] kellybrf:
[MENTION=6986419]Tronsmart[/MENTION] told me that while they officially rate the charger at 2.4a, it's actually capable of charging at 2.7 and that the phone likely doesn't accept the full 3a unless it's at near 0%, so this is probably why were seeing rapid charging from their unit as the included charger is only putting out around 2.6a from the tests that droid life ran yet is still considered rapid charging
[Nexus 6P Accessories] dwswager:
Given that Google has declined to specify what "Rapid Charging" means, how do you draw this conclusion? I suspect that "Rapid Charging", at least external to the phone, means nothing more than higher amperage. If so, at what setpoint do we get "Rapid Charging"? Because you can get higher than 2 Amps from Type A ports and cables. Hell you can get 20V/5A via A-to-C cables under USB PD.

Without a phone in my hand to test with, hard for me to say, but 1st test I would do is with this 5V/3A asus tablet wall charger and Micro B to Type C adapter. If we can verify high amperage to the 6P outside C-to-C chargers, then it opens up a whole plethora of options for both wall and CAR chargers. I say this because while I would buy the Tronsmart car charger based on posts here and elsewhere, I hate captive chargers in my car.

[IMG="5V 3A Charger"]http://g01.a.alicdn.com/kf/HTB1YM21GFXXXXaOaXXXq6xXFXXXn/202623695/HTB1YM21GFXXXXaOaXXXq6xXFXXXn.jpg[/IMG]

[IMG="USB 3.1 Micro B to Type C Adapter"]http://www.usb-c-adapters.com/wp-content/uploads/2015/06/USB3.1-C-TYPE-TO-USB-Micro-Adapter-3.1-cm-500x638.jpg[/IMG]
[Nexus 6P Accessories] MrKal_El:
Very nice.

Any devices in the works that have an Unattached cable? Or one that is actually rated for 3V?
[Nexus 6P Accessories] stopher819:
Good news, but as the person above me asked, will you offer one that just has a USB port for supplying your own cable? I've noticed that all 5v/3a chargers from all companies are wired like this, is there a technical limitation?
[Nexus 6P Accessories] GeekEric:
Anyone read this?

https://www.reddit.com/r/nexus5x/comments/3pv8bd/qualcomm_quick_charge_20_chipset_found_in_the/

Nexus 5X has the quick charge 2.0 chip inside. just wait for activate???

how about in Nexus 6P?
[Nexus 6P Accessories] marc.ientilucci:
any chance we can see the mAh the device is receiving? Other charges also show "charging rapidly" but are not charging at the same speed as the wall charger that comes with the device. I don't have to use car chargers very often but i'd like to get a reliable one in case i need a quick 10 min charge to boost my battery from 10% up to 50%+
[Nexus 6P Accessories] RED ZMAN:
Exactly. It may say that it is charging rapidly, but that doesn't mean it is the full rate [MENTION=6986419]Tronsmart[/MENTION] . DroidLife found that some of their other 2.4A chargers would show that it was charging rapidly, but the MAH was lower than full rate.

I'm assuming that there is some rate that the devices see that anything above it is considered Rapid Charging. Could be 2.4A, but we want the full thing.

Compatible? Yes. Full rate charging at 3A? No.

Are you going to put one out that is 5V 3A 15W OMFG?
[Nexus 6P Accessories] Bigal77:
The charger that came with Google was getting 2.6 while tronsmart was getting 2.5....i dont think any will actually hit the full 3
[Nexus 6P Accessories] combat goofwing:
Any links to UK sites for a suitable in car charger
[Nexus 6P Accessories] Born<ICs:
.

Looks like Tronsmart is way to go right now.

http://www.amazon.co.uk/gp/product/B0146FK3G0/ref=s9_hps_bw_g23_i1
[Nexus 6P Accessories] dwswager:
I concur. There is probably no fast charging "technology" at all and "Fast Charging" is assumed to occur when the current draw is above some nominal set point.

Of course, this only matters when the battery is mostly discharged and until the voltage stabilizes and before the amperage drops significantly. At some point, 3A, 2A and 1A chargers are all going to be delivering the same current to the 6P.
[Nexus 6P Accessories] bmdixon:
https://www.amazon.co.uk/dp/B0146JNUAW

Will this work the same as the one with built in type-c cable? Would prefer a slightly longer wire so wondering if this would fast charge (or at least quickly charge) the Nexus 6p?
[Nexus 6P Accessories] dwswager:
Should provide 2.4Amp which at 5V is 12W. Tronsmart says it actually will provide a little more than that. And remember, this only really matters when the battery is low. At mid to higher charge levels, the amps drawn by the phone will steadily drop such that the difference between a 3A charger and a 2A charger are nil. For example, connected to the Samsung 2A charger that came with the phone and battery at 86% charge, my wife's Note 3 was drawing only 0.87 amps. When the 3A charger is important is from 0% to about 40% charge. Then you will notice a difference.
[Nexus 6P Accessories] RED ZMAN:
Agreed, if you look at the DroidLife testing, none was done from 0% that I see, it was at 55/60% or 40%. At 40% the OEM charger was still what, 150mah ahead of the nearest competitor (2.6 A vs 2.5A), but at 1% it is probably near 3A on the same OEM charger.
[Nexus 6P Accessories] dwswager:
Anybody give this one a shot? 5V/3A single Type A female slot. Really small. Think for $5 I will get one and see what this does with a Type A to Type C cable. God, I wish my 6P would come already!

[IMG="Small Charger"]http://ecx.images-amazon.com/images/I/61LeesDH3GL._SL1500_.jpg[/IMG]
[Nexus 6P Accessories] slickromeo:
I have two questions...

#1. Will a 5V/3A charger fast-charge the Nexus6P with any usb-c charging cable? or does it have to be a USB-C 3.1 charging cable?

I ask because a lot of the USB-A to USB-C data/charge cables don't specify if they're version 3.1 or not, people buy them thinking they will quick charge as long as they plug into a 5V/3A charger...

#2. why are people buying tronsmart chargers when other chargers exist which match the 5V/3A specification Exactly? Case in point http://www.amazon.com/OPSO-Charger-Portable-Vehicle-Adapter/dp/B009O4BXGS
[Nexus 6P Accessories] dwswager:
Answer 1: No one knows for sure yet, but it appears that yes, a Type A to Type C solution will deliver more than legacy current to the 6P. Initial concern was that Google respected the PD standard to the point that a non-detectable (Read that as anything not C-to-C or not specifically designed as passively detected). However, I think we have enough confidence to argue that they weren't that stupid. A lot of other chargers/phones have been doing this for years outside the USB standards and is the basis for QC 2.0 chargers which use just about any cable.

Answer 2: The Tronsmart have been shown to deliver up to 2.7A with a nominal rating of 2.4A. Not 3A, but close enough for government work. And the one you listed is 15W total and it probably gets there by 2-7.5W (1.5A) ports. The one I listed is the 1st single port one I've seen listed as 15W. You have to remember the 0.5A was the original standard when batteries were 900mAh so a 3A charger is a lot of current in comparison.
[Nexus 6P Accessories] Haul:
People are flocking to the tronsmart charger because it performed best among the ~5 chargers that Droid-Life tested. Perhaps you could test the OPSO that you found against the tronsmart and post results.
[Nexus 6P Accessories] dwswager:
Aukey 4.8A / 24W Dual USB Car Charger Adapter that would be decent as well. Amazon Prime for $12.99 and super small.

[IMG="Aukey 4.8 Tiny Car Charger"]http://ecx.images-amazon.com/images/I/71P6E6B633L._SL1500_.jpg[/IMG]
[Nexus 6P Accessories] slickromeo:
the description on the link i posted, says, "Each of 2 USB ports' output could up to 3 amps", and after reading some reviews, it says, " It features two USB ports and each port can output up to 3 amps. There is one small thing though; the total output of the charger is limited to 3 amps. This means for example if you plug in an Apple iPad it will charge at 2 amps and if you plug an Apple iPhone into the other port it will charge at 1 Amp"

if you plug 2 phones into this, it will share 3 amps among two phones...

the Benefit this car charger has, is that it is USB-A to USB-C since those cables are more common/cheaper than USB-C to USB-C. All the while delivering a FULL 3AMPS according to the description ! the Tronsmart one does not describe outputting a full 3amps
[Nexus 6P Accessories] dwswager:
If it can output 3A to one port then it should work. I'm not spending a lot on charging accessories until I can test cheap solutions or others put up tests. As much as I think Type C will become ubiquitous in fairly short order, Type A is will always be cheaper.

You would think that anyone reviewing the phone would either confirm with Google or through independent tests what the hell the charging situation actually is, but instead they parrot the marketing non-sense that has zero value to users.
[Nexus 6P Accessories] slickromeo:
I've gone ahead and purchased the car charger I mentioned above ( http://www.amazon.com/OPSO-Charger-Portable-Vehicle-Adapter/dp/B009O4BXGS )

I am very excited to try it especially since according to their description it delivers 3Amps to one USB port (just dont plug anything in the second USB port)

when my Nexus 6P arrives in the mail, i will test it and I'll post replies back here...
[Nexus 6P Accessories] GuinnessX:
Your link was broken... I can't edit your original, but I fixed it in the above quote. Also, here:

http://www.amazon.com/gp/product/B00KB3VJ2O
[Nexus 6P Accessories] Cares:
How do you determine if your phone is being quick charged? I have a 6P and I want to test out my charger with a USB-C converter cable instead of buying a new charger.
[Nexus 6P Accessories] crazyg0od33:
...Type A cant output 3A at all anyway, so none of this really matters without Type-C
[Nexus 6P Accessories] rufflez2010:
Says who?
[Nexus 6P Accessories] dwswager:
Once more...Type A is a connector. There are wires that connect it to another connector at the other end. Every single USB connector ever made will support 5V/3A. The Asus Transformer TF100 (I think that is the model) came with a 5V/3A charger and Micro B end. The confusion is what the connectors can do and the standards for use that were put in place. If 5V/3A is applied to the charging wires (say applied to a Type A connector) on one end of the cable and you test at the other end, you will see nominal 5V/3A.

The USB Power Delivery standard (since 2012, Type C doesn't appear till 2014) supports 20V/5A over USB Type A, Type B, Micro B (micro B limited to 20V/3A) with a passively "marked" cable. Type C-to-C cables have the wires for configuration and are considered electronically "marked".

If what you mean to say is that the Nexus 6P will not accept 5V/3A unless a marked cable (C-to-C being the most likely) is used, that was and remains an unproven claim. There appears to be evidence to the contrary. It would be nice if some of the Android sites would actually test this in their reviews instead of giving meaningless information, but it looks like we will have to do it ourselves.
[Nexus 6P Accessories] fatboypup:
Ima just leave this here
[Nexus 6P Accessories] dwswager:
Above some setpoint, the phone displays "Charging Rapidly". The other easy way is to install a battery monitoring app that will show the mA draw during charging. Test this with the battery near empty to see what it draws as the typical charging curve for the amps will decline steadily as the battery becomes "full". At 94% charged, my current phone was only drawing 0.363mA off a 2A OEM charger.
[Nexus 6P Accessories] ilostmypistons:
What are you plugged Into? Do you have a quick charge car charger to test?
[Nexus 6P Accessories] vido.ardes:
This is from MKBHD's review
[Nexus 6P Accessories] Elnrik:
I've noticed it says fast charging when the current being pulled is far less than 2800 - 3000 mA. If you could post current draw using an app such as Ampere using that cable/charger, it might give a better indicator of what exactly it is doing. =)
[Nexus 6P Accessories] hokee:
I purchased a StilGut Charger from Amazon (amazon search ASIN: B01278TNMS). Hope to get it soon to try out. We'll see if it actually supports 5V@3A.
[Nexus 6P Accessories] RED ZMAN:
That's the same one under a different brand that several of us have bought. I've been using it with my LG G3 for a couple of weeks now to ween myself off of Qi charging in my car.
[Nexus 6P Accessories] fatboypup:
gonna wait for your result before I drop $20 on it
[Nexus 6P Accessories] Darryl991:
Well the phone arrived yesterday so this was the first chance I had to test the Tronsmart charger I mentioned near the beginning of this.

Very odd. I got home and turned the engine off and removed the key. I was just about to grab my phone and the dashboard/radio etc came back on. I thought something had gone funky with the ignition switch so turned it on again and back off. Same thing.

It was only when I unplugged my phone that everything switched off in the car. I'd been using the charger with my N5 without issue, but obviously I wasn't using the built in C connector.

It's 3am here but I'll have a look when I get to the office later, see if it does the same thing. BTW, I leave the charger plugged into the car without issue. Only seemed to be an issue with the phone connected.
[Nexus 6P Accessories] rufflez2010:
Hmm... I'm wondering if your phone is powering your car. Type C supports 2-way power transfer. You could actually charge another phone with your phone via type c to type c cable. Guess your car's electronics can run on as little as 5V... Its possible.
[Nexus 6P Accessories] Darryl991:
I thought about that. You can get those solar trickle chargers but the actual ignition was on. I imagine I could have bump/push started it.
[Nexus 6P Accessories] Darryl991:
Tried again this morning. Got in, plugged the phone in and the electrics in the car went crazy! The power/cigar/cigarette socket isn't even powered when the ignition is off.

Once the ignition is on it seems to behave, though I've no idea if it actually is.

The car's in for a service tomorrow, I may ask the dealer if they've heard of anything like this before.
[Nexus 6P Accessories] ylexot:
Sounds like Tronsmart needs to add a diode so that devices aren't sending power into the vehicle.
[Nexus 6P Accessories] Darryl991:
Do you think there could be an issue with having it connected, at least when the engine is running?
[Nexus 6P Accessories] GuinnessX:
Shouldn't there be a setting to allow/disallow 6P source charging? It should be disabled by default, but apparently isn't--at least in Darryl's case...
[Nexus 6P Accessories] lemmyslender:
I have a charger with 3 slots 1A/2A/2.1A. Yesterday I drove home with navigation (maps), streaming music over bluetooth, and display on full (adaptive on). The 2.1A socket charged the 6p from 35% to 42% in about 12-15 minutes.

The display noted "Rapid Charging", obviously not the full 3A, but most decent 2A+ chargers should be able to keep up with it, and even charge while using in the car.

Just thought I'd throw that out there for everyone.
[Nexus 6P Accessories] lemmyslender:
It is a switched outlet, so power off when the car is off. I didn't notice anything funny last night when I shut the car off, but I'll check tonight.
[Nexus 6P Accessories] Scyntherei:
I ordered this one: http://www.amazon.com/gp/product/B009O4678C?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s02

I realize it'll be a USB-A to USB-C connection and the power will probably be cut in half if two devices are plugged in, but for $5 I thought why not try it, anythings better than the 1.2a car charger that I have now. lol

I'll report back charging milliamps/charge speed if anyones interested.
[Nexus 6P Accessories] slickromeo:
I purchased the EXACT Same one !

however, still no Nexus 6P to test it on, waiting for it to ship still...

what i like the best about the car charger we ordered is that you get 5v/3amp for $5

I haven't seen anything priced better than that.
[Nexus 6P Accessories] Darryl991:
Right. It does the same using the A to C port.

Hmmm.

But, with satnav on for 30 minutes I had 100% charge at the end of the journey.

But it still wanted to power my car when I turned the ignition off.
[Nexus 6P Accessories] lemmyslender:
Just checked in my car. With the car off, nothing funny. However, the led on the charger flickered on and off when the 6p was plugged in (car/power off). It may have just been the 6p trying to communicate a charge power?
[Nexus 6P Accessories] Bigal77:
i dont think thats true

droid life tested these and it tested at 2.5 while the one that came with phone was at 2.6

I think it says 2.4 because no 3.0 was in existence last month, besides one plus 2 which doesnt offer quick charge anyway

i ordered it so ill know more next week, but this seemed very rapid or faster than 2.4 and using a type a to type c
[Nexus 6P Accessories] based:
How about this one? http://www.amazon.com/gp/aw/d/B00M6QODH2/ref=pd_aw_sim_422_1?ie=UTF8&dpID=41YfzafgTqL&dpSrc=sims&preST=_AC_UL100_SR100%2C100_&refRID=0P0902PSS8WDM4QWK4YH
[Nexus 6P Accessories] init_dot_t:
I have an Anker one that is similar and with the type a to c cable I bought it does not charge rapidly.

---------- Post added at 09:24 AM ---------- Previous post was at 09:21 AM ----------

So are you using a constant 12V outlet or switched? I've been looking at the tronsmart charger but haven't pulled the trigger yet.
[Nexus 6P Accessories] TheDave1022:
Aukey is coming out with a proper adapter. Think we just need to wait if you want proper fast charge.
[Nexus 6P Accessories] Darryl991:
It's switched!
[Nexus 6P Accessories] warplane95:
new car does this.
[Nexus 6P Accessories] notfuzzi:
After reading all the comments and the fact that Tronsmart came and posted, I think I'm going to place my order for it today. Shame it isn't in stock until Nov. 2 though. I'll be flying to NYC on the 5th so I hope I get it before then!

Go go Tronsmart! http://amzn.to/1GP0HVn