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Charging Nexus 7 - travel charger

Hi all,
Can I please get some advice from someone who might know better than me. I have been using the following charger on my travels to charge an iPad and Samsung galaxy nexus at the same time:
http://www.amazon.co.uk/Skross-Char...?s=electronics&ie=UTF8&qid=1342643375&sr=1-23
I've just plugged my nexus 7 in on its own and I get nothing.
I didn't think the nexus would need a higher amp than the iPad? The Asus plug that's charging the nexus says its 2amp and the travel charger says its 6.5amp. Am I being amazingly blind or stupid here?
And if I need a new travel charger for my trips into Europe can I have some advice on what to buy before I buy something else useless.
Thanks all!
Sent from my Nexus 7 using xda premium

Nexus 7 trouble with other chargers
I see the same issue.
The Nexus 7 charger lists: Output 5.0V===2.0A, Nexus 7 will charge.
iPad 2's charger shows: Output 5.1V===2.1A;Max 10Watt, Nexus 7 will not charge,
Philips universal charger: Output 5V===2A; Max 10Watt, Nexus 7 will not charge.
Blackberry phone charger Output 5V===500mA, Nexus 7 will not charge.
Blackberry phone charger Output 5V===700mA, Nexus 7 will charge.

To answer the OP: The Amazon product page clearly states Output 5.0 VDC / 1000 mA max. N7 needs 2000 mA (2A). Derping in public again. Don't mind me. :silly:
To add to the list:
Samsung Galaxy Tab 2 7.0 Charger: Output 5V ⎓ 2A; Max 10Watt, Nexus 7 will charge.
XtremeMac IPU-IH2-11: Output 5V ⎓ 4.2A (2.1A per port); Max 20Watt, Nexus 7 will not charge. (Galaxy Tab 2 7.0 charges though.)
The N7 seems very picky about chargers, unfortunately. My XtremeMac is now powering my charge cables for my wireless mouse and keyboard, freeing up 2 USB ports, so not all is lost I guess.

I have a 2.1a car charger, but it doesn't charge it.
http://www.amazon.com/gp/product/B007TV88F2/ref=oh_details_o00_s00_i00
EDIT: Interesting. It will not work on the car charger wiht my "charging only cable" which has shorted out datapins to register as an AC source. But, it does charge on a normal USB cable.

I have a tf201 charger (here i refer to the usb block, not the cable) that seems to super charge the nexus 7, that is to say, very fast. The tf201 charger is 18 watts. Also, I have noticed my usb 2.0 ports on my desktop will not charge the n7, but my usb 3.0 ports will.
Sent from my Nexus 7 using Tapatalk 2

I started a related thread asking if anyone has examined the proprietary aspects of the charger here:
http://forum.xda-developers.com/showthread.php?t=1780211
Basically, we should be able to build (or eventually buy) some type of adapter to enable proper charging with any 2A charger after we figure out exactly what the charger is doing. I wouldn't be surprised if all Asus tablet chargers already worked properly without an adapter.

zinfinion said:
To answer the OP: The Amazon product page clearly states Output 5.0 VDC / 1000 mA max. N7 needs 2000 mA (2A).
Click to expand...
Click to collapse
This answer is clouding up a lot of legitimate discussions. The current rating doesn't matter to this conversation at all. If the current is above 0 the device should show the charging icon. If not, there is some other problem.

qoncept said:
This answer is clouding up a lot of legitimate discussions. The current rating doesn't matter to this conversation at all. If the current is above 0 the device should show the charging icon. If not, there is some other problem.
Click to expand...
Click to collapse
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.

zinfinion said:
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.
Click to expand...
Click to collapse
Agreed. I bought a pair of dual 2A chargers and neither of them will charge it at all (no charging icon). I tried shorting the data lines and still nothing. The dual charger that came with my Razr will charge it slowly (about 16 hours from 0 to 100%). My old 700ma Blackberry charger works just better than anything other than the OEM charger. Frustrating and I don't want to keep ordering different chargers with my fingers crossed.

zinfinion said:
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.
Click to expand...
Click to collapse
I don't know what a XtremeMac charger is, but I'm assuming it's for charging an iphone or ipad or something? the Nexus 7 and the apple products don't share the same charger design, so the Nexus is probably only drawing 500mA while charging from it.

You can also add the MonoPrice 8856 charger to the list that do not work with Nexus 7

Mine is charging with Galaxy Nexus 5.0v 1.0A charger.
Sent from my Nexus 7 using Tapatalk 2

I have two chargers that work.
1: Nokia 1.2a fast charger
2: Blackberry 1.8a charger
both have integrated charging cables, which are 6ft in length.

The Asus transformer prime which is a USB charger with proprietary cord also has something weird. Other USB chargers with the same power specs connected with the Asus USB cable won't charge the prime. Or they charge where it literally takes like 24 hours to reach 100 percent.
There's something different in that Asus power plug on both devices it seems.
Sent from my Nexus 7 using xda premium

I'm not sure what It's output is but the standard Verizon branded micro usb charger does a great job charging my N7. I think they for sell around $30 in the VZW stores tho.

The 1.0a charger that came with my LG Revo works great, almost as fast stock. I bought 2 extra of that charger on amazon about 9months ago for under 10 for the pair.
Also the charger for my old Droid (.7a iirc) works as well, but it's slow as hell with the screen off, and barely keeps up with just web surfing.

The Charger with the HTC Desire seems to be charging - though slowly as its a 1A charger.

Does anyone know whether the International Samsung Galaxy S II charger works?

The TF101 charger works great, and fast too - about 1% a minute.

My Samsung SG2 (i777) charger seems to work with the N7

[Q] How much can the phone get charged maximum? can it handle 2A?

Hi,
I've got my phone with samsung's charger of 1A (bought it from an open store locally - it was the cheapest), so I ordered a Sony Ericsson charger of 1.5A which charges up much faster..
My question is, could it goes even faster?
I've seen some Galaxy Note 2 and S 4 charger of 2A like these:
http://www.ebay.com/itm/2A-USB-Wall...S_Cell_Phone_PDA_Chargers&hash=item5658d7a0bd
http://www.ebay.com/itm/OEM-2A-USB-...l_Phone_PDA_Chargers&var=&hash=item51aabf953a
Could our phone handle it and charge it with the whole 2A power? could it ruin the battery with that high Ampere?
I'm asking this because I've ordered a docking station like this:
http://www.ebay.com/itm/261247762140?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Which says 1.6A, so I was thinking perhaps theres stronger chargers out there for it..
Thanks!

im not sure about this but i believe the charger that comes with the phone is a 2 amp charger

It can handle 2A through USB port.
Via the charging dock, it can take 1.8A. Is that dock you are linking to an original part?
I have two DK26 docks and both say 1.8A, not 1.6A. Although if you connect a 2A charger to the dock, it'll be fine, it just won't be using the whole 2A input.

skinsfanbdh said:
im not sure about this but i believe the charger that comes with the phone is a 2 amp charger
Click to expand...
Click to collapse
I've never seen a Sony's charger with 2Amp, do you mind to picture the detailed information in the back of your charger please?
DrKrFfXx said:
It can handle 2A through USB port.
Via the charging dock, it can take 1.8A. Is that dock you are linking to an original part?
I have two DK26 docks and both say 1.8A, not 1.6A,
Click to expand...
Click to collapse
The Dock I've linked is a chinese copy, not the original, the one says 1.6A on description on Ebay, Does your original DK26 dock comes with charger too? What input and output is it says on each one? (picture could help much)
Also, how do you know it can handle 2A through USB? is that for sure?
Thanks for both!

The docks come barebone. No chargers included.
The charger included on the box of the phone is rated at 1.5A.
I have a Nexus 7 2A charger and an old Nokia 1.2A charger aside from the included 1.5A charger. All work fine either via USB or via the dock.
I can't notice any mayor difference on charging times, though. 1.2A charges almost as if not as fast as the 2A one. Iphone's 1A chargers do seem to take like 4 hours to charge the phone compared to the standard 2.5h I get from other higher rated wall chargers.
There are no 2A Sony chargers as of now.

DrKrFfXx said:
The docks come barebone. No chargers included.
The charger included on the box of the phone is rated at 1.5A.
I have a Nexus 7 2A charger and an old Nokia 1.2A charger aside from the included 1.5A charger. All work fine either via USB or via the dock.
I can't notice any mayor difference on charging times, though. 1.2A charges almost as if not as fast as the 2A one. Iphone's 1A chargers do seem to take like 4 hours to charge the phone compared to the standard 2.5h I get from other higher rated wall chargers.
There are no 2A Sony chargers as of now.
Click to expand...
Click to collapse
I see, I think I've cleared my doubts and I shell buy this 2A samsungs charger..
Thanks!

mcjordan92 said:
I see, I think I've cleared my doubts and I shell buy this 2A samsungs charger..
Thanks!
Click to expand...
Click to collapse
I'm using a 2A as my car charger works perfect.
Sent from my C6603 using Tapatalk 2

It should handel 2.A but I won't remand it. I don't think it's good for battery. But one thing is pretty sure. The phone will heat more up as the charging circuit have to dissipate more excess power. Can not affirm it as I don't exactly know it's made but I'm just saying...
"I know that my English isn't perfect, but I still hope it's comprehensible." Send over the cool Xperia Z

The downside would be possibly shortening the usable life of your battery, because the higher amp charging will likely heat the battery to a higher temp.
There's no free lunch.
To me, waiting a bit longer for charging is worth it to ensure the longest charge cycle life, particularly since the battery is sealed into the device. If it was a cheap and easy replaceable battery, maybe.

Amps don't matter unless it is lower than the specification
Think about your car battery having 700amps but your car stereo is fused for 20amps. Your car stereo gets its power from the battery directly. There is no power regulation. Your device will take only what it needs. It won't effect the life of your battery. Think about the charger you plugged into the wall socket. A wall socket can generate enough current to melt metal. Lower power draw is cooler but really just make sure the voltage rating matches and the amp rating isn't too low. USB should be 5 volts anyways. The big issue with amperage, can the charger handle the draw? Example would be a 3000watt car amp drawing power from a 18 gauge speaker wire. It might work but the wire will heat up since it isn't designed to carry that much current.
In short for USB the charger amperage can be higher than the device needs but probably no less than 1/2 the rated amps for the device.

As above, you could plug in a 200A charger and the phone will still only draw the same current as from a 2A charger.
The amount of current drawn by the device is firmware controlled to protect the battery from heat damage.
The stock charger is 1.5A so the phone must draw no more than that.

It's all about cables too. I have a 2 amp TomTom charger hooked up to a 3 metre long USB cable but it charges slower than the standard 'in the box' charger Sony supply at 1.5 amp.
More cable and wrong core rating = more energy lost or wasted. I actually had to ask a sparky about this one, but it's true. Cable length, rating and core make all the difference.
For instance.
If you hooked up a 3 amp charger (I had one for an old phone) to a cable that can only handle 1 amp then you will only get 1 amp into the device, probably melt your cable too over time.
Honestly, the best bet is to use as near as dammit to the original rating on the included in the box charger. Electricity is a funny thing, it can screw your phone up in ways only time and noting the battery life will show.
Sent from my C6603 using xda app-developers app

[Q] Best Car Charger

I am looking for best car charger, my phone will be all day on in the car, and I am looking for best solution for charging in the car, and fastest.
I found few good chargers but not sure are they support quick charge
Samsung OEM ECA-U21CBE Micro-USB 2-Amp Rapid In-Car Power Charger
and
Car Charger, iOttie RapidVolt 5Amp/25-Watt Dual Port USB Car Charger
Or is there some third better solution? Sorry I can't post links
thank you

anything above 2A is consider fast/rapid charge and barely any difference than the "quick charge" not to mention, saving a few mintues might do more harm than good to your replaceable battery.. at 2A, the phone will go from 6-10% battery to 50% in about 25 minutes.
Anker:
http://www.amazon.com/gp/product/B00D82O68Y/
Ottie:
http://www.amazon.com/gp/product/B00KTBOUWO/
I have the Anker and would buy it again, and has tons of positive reviews..

Thank you, what about Verizon Quick Charge 2.0?

I have used Verizon QUALCOMM version and would recommend the quick charge version if you want to take advantage of the quick charge. If time to charge I not an issue then obviously any high amp charger like the units cited above such as iottie would work

Is quick charge healthy for battery in my case? Or maybe should I get slower one?

I am using the Airdock.
While I can't say I loved it with the S5 (was falling off) the flat back of the Edge fits perfectly on it so I'm much happier with it.
Fun streaming video, back passengers can watch video off of it with the car speakers...
works well.

rhesus98 said:
While I can't say I loved it with the S5 (was falling off) the flat back of the Edge fits perfectly on it so I'm much happier with it.
Fun streaming video, back passengers can watch video off of it with the car speakers...
works well.
Click to expand...
Click to collapse
I think we are talking about chargers

TozABG said:
I think we are talking about chargers
Click to expand...
Click to collapse
Airdock is a wireless charger.

TozABG said:
Is quick charge healthy for battery in my case? Or maybe should I get slower one?
Click to expand...
Click to collapse
faster charging will always put a bit more wear on battery than charging at a slower rate. most people here will probably swap devices often so probably doesn't matter for them. if you plan to keep your device for a few years and want max battery life then maybe use a 5V 2A charger instead (one that i've linked to above).
2A is still "fast charge" the only difference is it's Quick Charge 1.0 which is at 5 Volts compared to Quick Charge 2.0 that runs at 9 Volts.
better example:
Quick Charge 1.0 - 5V @ 2A (5V * 2A) = 10 Watts of power
If your phone is at around 8-10% you'll get to about 50% charge in about 30 minutes.
Quick Charge 2.0 - 9V @ 1.7A (9V * 1.7A) = 15 Watts of power (up to 12V * 3A = 36 watts for some tablets)
If your phone is at around 8-10% you'll get to about 50% charge in about 20-25 minutes.
Quick Charge 2.0 will only be a little bit faster once the battery gets to around 50-60%, then it will throttle down to Quick Charge 1.0 rates to keep the battery from getting too hot and causing excessive wear.
All Quick Charge 2.0 devices are also backwards compatible with Quick Charge 1.0, meaning that you can use a Quick Charge 2.0 device with a Quick Charge 1.0 supply, and visa versa.
In short: Quick Charge 2.0 will only save you about 15 minutes to completely charge your phone compared to the normal 5V @ 2A chargers.

Get Verizons branded car charger with fast charge. Workscexcellent, and AND has a little flashlight right above the micro charge plug, which comes in super handy in dark car. Very well made.

tft said:
anything above 2A is consider fast/rapid charge and barely any difference than the "quick charge" not to mention, saving a few mintues might do more harm than good to your replaceable battery.. at 2A, the phone will go from 6-10% battery to 50% in about 25 minutes.
Anker:
http://www.amazon.com/gp/product/B00D82O68Y/
Ottie:
http://www.amazon.com/gp/product/B00KTBOUWO/
I have the Anker and would buy it again, and has tons of positive reviews..
Click to expand...
Click to collapse
Thats not true, Yes its better
if you want Fast charge it has to have 9v out
others have 5v out even tho some have a 2.4amp out not a fast rapid charger

Good Car charger
Search Amazon for ASIN:B00ZA1E3IE

I've got two of these:
http://www.amazon.com/Getwow-Charge-Dual-Port-Charger-Adapter/dp/B00V347I9S/ref=sr_1_2?ie=UTF8&qid=1437142458&sr=8-2&keywords=getwow+quick+charge+2.0&pebp=1437142467005&perid=0CTJ7JA68RAQ65CF2GVN
One in my car for my S6 Edge, one in my wife's SUV for her Note 4. Both work fantastic. They have one QC 2.0 port and one 2A port. Check it out!

Not sure whether this Car Air Conditioner Vent Mount is for you or not.

This looks like same as adaptive fast wall charger:
http://www.samsung.com/us/mobile/cell-phones-accessories/EP-LN915UBESTA
http://www.amazon.com/gp/product/B00X4JGELS?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
Did anyone try it?

shaq1907 said:
This looks like same as adaptive fast wall charger:
http://www.samsung.com/us/mobile/cell-phones-accessories/EP-LN915UBESTA
http://www.amazon.com/gp/product/B00X4JGELS?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
Did anyone try it?
Click to expand...
Click to collapse
I bought this one. Didn't fully test yet but when I plug this, it says "fast charging". It would be better if this has light notification. But it's good that it charges fast.

charging rapidly with aukey quickcharge 2.0 wall charger and type c adapter

so this combo is working for me:
http://www.amazon.com/gp/product/B010UT6Z3Q?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s01
http://www.amazon.com/gp/product/B00W98IQ5M?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00
the latter also allowed me to fastboot oem unlock.
so battery is at 59%, homescreen says 14 minutes till full.
cheers

can you please check with Ampere or GSAM for the charging speeds that you achieve?
does the device say fast/rapid charging?

Interested to hear the results from Ampere or GSAM as well

i cant get a good handle on how ampere works. it keeps measuring, takes forever, and fluctuates a lot.
with the aukey combo, i got 1830/2050mA @ 4.14v, at 53%, 37.7c
took it off charge for a while and tried again with the stock charger:
with the stock charger, i got 1850/1860mA(min/max) @ 4.159Vat 61%, 30.7c
I will try again at 50% today if I have time but I am pretty pleased with my little aukey combo. It was cheap.. I got it when there was a 7 dollar coupon floating around.

FYI, believe this is the same charger : http://www.amazon.com/gp/product/B00QEX83LA/
Use Promo Code DBVITSZB to drop price to $6.99
Can only purchase 1 at the discounted price.

TCstr8 said:
FYI, believe this is the same charger : http://www.amazon.com/gp/product/B00QEX83LA/
Use Promo Code DBVITSZB to drop price to $6.99
Can only purchase 1 at the discounted price.
Click to expand...
Click to collapse
Yep that would be the one. charging at 1800mA is not the fastest that the phone can charge at though. I'm going to hold off for the ones that enable the full speed of charging
http://www.droid-life.com/2015/10/19/nexus-6p-nexus-5x-quick-charge/

For 7 bux I think it's still a good deal for someone who doesnt have a spare to use

From the product description, you are only going to get 2A out of the charger. 5X doesn't do QC2.0, so you will only get the output at 5V, which for this charger is 2 amps.
Specifications:
Input: AC 100-240V
Output: 5V/2A, 9V/2A, 12V/1.5A
Dimensions2.69*2.05*0.87in)(68.5*52*22mm)

zackhow said:
From the product description, you are only going to get 2A out of the charger. 5X doesn't do QC2.0, so you will only get the output at 5V, which for this charger is 2 amps.
Specifications:
Input: AC 100-240V
Output: 5V/2A, 9V/2A, 12V/1.5A
Dimensions2.69*2.05*0.87in)(68.5*52*22mm)
Click to expand...
Click to collapse
But some Aukey chargers with AIPowertech like this one "charges all non-Quick ChargeTM 2.0 phones and tablets at their normal speed (up to 5 volts / 2.4A Max)with AIPower Tech Technology."
I've got the charger, just not the cables... so haven't been able to test.

I tested Aukey PA-T2 wall charger QC2.0 port ( orange one) on a Sony Xperia Z3 compact tablet
I recorded charging current up to 2.7Amp with the Aukey USB cable and up to 3.0 Amp with the Sony USB cable !!!! far more than the 2.0 Amp level current Aukey specifies......
The voltage - current output test show that the voltage stay in the 9.0V range with current up to 2.4Amp then fall down very quickly. It seems that the voltage stay at a value enough to deliver up to 3.0 Amp charging current to the tablet ....
Detailed test are here (http://78michel.unblog.fr/?p=860 in french....)
Current values where obtained from BMW recordings

Using the
Aukey Quick Charge 2.0 18W USB Turbo Wall Charger
And
http://www.amazon.com/dp/B01706YAXY
Getting Charging Rapidly. The juice isn't nearly as good as the stock charger, but this is the first combo with a USB-A to USB-C cable that I've gotten the Charging Rapidly notification.

7_michel said:
I tested Aukey PA-T2 wall charger QC2.0 port ( orange one) on a Sony Xperia Z3 compact tablet
I recorded charging current up to 2.7Amp with the Aukey USB cable and up to 3.0 Amp with the Sony USB cable !!!! far more than the 2.0 Amp level current Aukey specifies......
The voltage - current output test show that the voltage stay in the 9.0V range with current up to 2.4Amp then fall down very quickly. It seems that the voltage stay at a value enough to deliver up to 3.0 Amp charging current to the tablet ....
Detailed test are here (http://78michel.unblog.fr/?p=860 in french....)
Current values where obtained from BMW recordings
Click to expand...
Click to collapse
LOL, thanks... but that doesn't really help this 5X cause. Given that there is no quick charge on the 5X, it'll remain at 5V. The question is whether it'll pull more than the 2A or 2.4A specified on these chargers at 5V on a 5X.

PatcheZ said:
LOL, thanks... but that doesn't really help this 5X cause. Given that there is no quick charge on the 5X, it'll remain at 5V. The question is whether it'll pull more than the 2A or 2.4A specified on these chargers at 5V on a 5X.
Click to expand...
Click to collapse
Aukey quick charge 2.0 behave like a standard charger when connected to a non QC2.0 compatible device. The output voltage will stay to 5V so the current level will be very sensitive to the quality of the USB cable and limited by the maximum current the device will afford.
In practice it is very difficult to reach 2A charging level ( even if the charger is able to deliver such current) with a voltage output of only 5V , due to losses in cables and connectors
From my experience the higher current charging level I obtained was with a Samsung wall charger refence EP-TA10EWE which deliver an output voltage of up to 5.5V at 1.9A ( nominal voltage is claimed at 5.3V)
I got 1.7Amp charging current on my Nexus 5 while with the Aukey QC2.0 the current was only 1.1 Amp in exactly same conditions ( these recorded data are also reported in my blog .....in French.....)

7_michel said:
Aukey quick charge 2.0 behave like a standard charger when connected to a non QC2.0 compatible device. The output voltage will stay to 5V so the current level will be very sensitive to the quality of the USB cable and limited by the maximum current the device will afford.
In practice it is very difficult to reach 2A charging level ( even if the charger is able to deliver such current) with a voltage output of only 5V , due to losses in cables and connectors
From my experience the higher current charging level I obtained was with a Samsung wall charger refence EP-TA10EWE which deliver an output voltage of up to 5.5V at 1.9A ( nominal voltage is claimed at 5.3V)
I got 1.7Amp charging current on my Nexus 5 while with the Aukey QC2.0 the current was only 1.1 Amp in exactly same conditions ( these recorded data are also reported in my blog .....in French.....)
Click to expand...
Click to collapse
Thanks, didn't think to look at the link.
I wonder how older phones like the NA Galaxy S3 and Nexus 4 that both have QC1.0 ([email protected]) compare to the charging of the Nexus 5.
I'm curious as to how you did your testing, as I'm going to try my own testing once my cables come in. Did you drain all your phone's battery to 0 before performing each test? Phone airplane mode vs off? I also think that all tests must be done in relation to time, especially since the charging profile changes as the phone charges. I'm also curious as to how the non QC port on the Aukey performs, since it's spec'd at 2.4A @ 5V.

PatcheZ said:
Thanks, didn't think to look at the link.
I wonder how older phones like the NA Galaxy S3 and Nexus 4 that both have QC1.0 ([email protected]) compare to the charging of the Nexus 5.
I'm curious as to how you did your testing, as I'm going to try my own testing once my cables come in. Did you drain all your phone's battery to 0 before performing each test? Phone airplane mode vs off? I also think that all tests must be done in relation to time, especially since the charging profile changes as the phone charges. I'm also curious as to how the non QC port on the Aukey performs, since it's spec'd at 2.4A @ 5V.
Click to expand...
Click to collapse
All tests are made with battery drained to zero before starting , and a complete charge is done in each conditions. That way I can check that the full charging time is logically related to the recorded current values. The current is recorded during the complete cycle at a frequency of one value per mn.
The air plane mode was off.
Aukey QC port and non QC port are slighly differents when connected to non QC2.0 devices :
QC port delivers 5.1V in open circuit, the voltage encrease to 5.2V at 2.2Amp, on the contrary the non QC port delivers 5.2V in open circuit and decrease to 5.1V at 2.2Amp. I did not test them at higher current level.
I did not tested Galxy S3 or Nexus4 , but I beleive that a charger like the Samsung EP-TA10EWE will deliver them the maximum charging current they are programmed to accept, as obeserved for the Nexus 5.
I got the same charging current curve I recorded with Nexus 5 and Samsung EP-TA10EWE, with other set of charger and cable. This means that this charging curve is defined by the Nexus 5 inner program , not the charger characteristics. The problem is that we never know which is the max current curve internally programmed for each smartphone...... so it could be a long way to find it.......

Aukey Quick Charge 2.0

Hi! I bought a wall charger from Aukey that allow to charge up to 3 devices at the same time, what is great since I'll be able to charge the phone and the tablet at the same time! According to the manufacturer the charger is able to adapt the output to the needs of the devices! So my question is, can I use this charger to charge the GWR without damage the watch, since the output of the original charger is only 0.85A!

I think it should be fine. I have used my charger a couple of times without issue for my GWR and now my Huawei
Sent from my Nexus 6 using Tapatalk

I've been using an Aukey quick charger for a month now and no problems whatsoever. Normal charging times obviously (blisteringly fast on S6 however)

zemblance said:
I've been using an Aukey quick charger for a month now and no problems whatsoever. Normal charging times obviously (blisteringly fast on S6 however)
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So I don't need to hurry about the output current, or in other words, get the watch too much warm and reducing the battery life?

Obiwanhug said:
So I don't need to hurry about the output current, or in other words, get the watch too much warm and reducing the battery life?
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It is completely fine. The charging circuits of these devices (watches, phones, tablets etc) takes only what it is allowed by the limitations set to the charging IC circuit when supplied with 5v power over USB. I have an USB amp meter and the GWR barely uses half of the original chargers 0.85a capability. I've used my OnePlus One charger (a high quality 2A charger) to charge my watch as well occasionally, which also charges my Nexus 7 2013 regularly and that never takes more than 1A~ from this as well.

I've been using a Aukey Charger for a couple of months and no problem so far. The current regulation is supposed to be made by the device, not by the charger anyway ...
For those who wonder, I also checked if our G Watch R has QC 2.0, but it doesn't. It still charges at 5V on a QC 2.0 slot.