Nexus 7 : USB Power Behavior - Nexus 7 Q&A, Help & Troubleshooting

Is there any information about the USB power behavior for the Nexus 7?
The official Nexus 7 answer is to use their wall charger.
Background info:
By default USB provides 100mA per port.
With host negotiation it can provide 500mA per port.
Apparently the Nexus 7 wall charger provides more, anybody know what it is?
Does the Nexus 7 respect the USB BC 1.1/1.2?
What is the power situation for the four side contacts?

Not sure about all of this but the official charger is faster than usb because it runs at 2 amp. which is much more than a usb 2.0 normally will provide

Source of info?
lamboboy732 said:
Not sure about all of this but the official charger is faster than usb because it runs at 2 amp. which is much more than a usb 2.0 normally will provide
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Click to collapse
Do you know it is 2.0 A because you hooked a meter to the charger/android pair while charging or is there a source for this info?

phreede said:
Do you know it is 2.0 A because you hooked a meter to the charger/android pair while charging or is there a source for this info?
Click to expand...
Click to collapse
The charger itself has 2.0A written on it for Output

phreede said:
Do you know it is 2.0 A because you hooked a meter to the charger/android pair while charging or is there a source for this info?
Click to expand...
Click to collapse
Yes read the charger. 5v 2amp.
IPad charger is the same 10watts.
Sent from my Nexus 7 using Tapatalk 2

Related

Nexus 7 Battery recharging method

Hello everyone, I just bought my Nexus 7 from Ebay (from an UK seller) but the wall charger for UK doesn't work here in my country so:
Can I use the PC to recharge it trough micro USB?
If I can recharge it in this way, recharging needs more time?
sorcio46 said:
Hello everyone, I just bought my Nexus 7 from Ebay (from an UK seller) but the wall charger for UK doesn't work here in my country so:
Can I use the PC to recharge it trough micro USB?
If I can recharge it in this way, recharging needs more time?
Click to expand...
Click to collapse
1. Yes, you can recharge over your PC USB
2. Yes, unless you have high output USB ports (default charger is 2A, most PC USB ports are 500mA to 900mA) so the charge time is longer.
goofball2k said:
1. Yes, you can recharge over your PC USB
2. Yes, unless you have high output USB ports (default charger is 2A, most PC USB ports are 500mA to 900mA) so the charge time is longer.
Click to expand...
Click to collapse
Thanks,
this feature of my motherboard can help me in some ways? http://www.asrock.com/feature/appcharger/index.asp
You can only charge it if the screen is off or better yet if the device is off. Give it 12 hours for a full charge over standard 500mA USB.
Sent from my Nexus 7 using xda app-developers app
Yeah, if you use your nexus 7 while its plugged in to the USB port of your PC you will loose battery, in Particularly if you are gaming lol. Mine when down from of 7% in 30 mins. Use a wall charger.
redmonke255 said:
You can only charge it if the screen is off or better yet if the device is off. Give it 12 hours for a full charge over standard 500mA USB.
Click to expand...
Click to collapse
Is it really this kind of slow?
fredyboy said:
Yeah, if you use your nexus 7 while its plugged in to the USB port of your PC you will loose battery, in Particularly if you are gaming lol. Mine when down from of 7% in 30 mins. Use a wall charger.
Click to expand...
Click to collapse
As I saild in the OP i cannot use that wall charger in my country
Surely you could buy a separate microUSB wall charger from somewhere in your country.
I've been using HTC and galaxy s2 charge. Had no problems and charging is very fast. Went from 30 to full in 2.5 hours
Sent from my Nexus 7 using Tapatalk 2
desiresiscool said:
I've been using HTC and galaxy s2 charge. Had no problems and charging is very fast. Went from 30 to full in 2.5 hours
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Thanks for the answer I will use the one of my note
You could always use a power adapter as well adapt from us plugs to your countries plugs
Chargers....
A Standard AC USB Charger will do the job in most cases, I'm using a powered Logitech USB Hub that just charges my BT Headset, my Galaxy S2 and now my Nexus 7.
If you want some faster charging times a Standard iPad USB charger plug should work, (they're rated for 2.1A instead of the 1A of the Normal iPhone chargers) just use the MicroUSB cable that you have and plug it in.
In response to your App Charger driver, it's probably that AsRock has built their USB ports and plumbed it in to higher +5V Amp line on your motherboard ie. they can deliver more power than the Standard USB Spec (500mA), I'm guessing at their 40% faster claim the port is delivering 900mA.
Good luck! The Nexus 7 has a 4326 mAh battery (ie 2.6x bigger than the Galaxy S2 Battery) so it'll take much longer to fill than all the Smartphones

Dual Nexus 4 or Nexus 4/10 Car Charger

Has anyone found a dual car charger for two Nexus 4's or a Nexus 4 and a Nexus 10 whilst in use?
Most dual car chargers seem to have one output to charge Apple devices at 2A plus another output to charge non-apple devices at 1A which is not what I need.
Thanks
I've managed to find something but it seems to be unavailable in the UK
http://www.discountcell.com/cellular/p/gonexus-10_usbd3-1ablk_3
Monoprice has plenty of these. I love their products and pricing.
It might be possible to charge two Nexus 10 tablets or two Nexus 4 phones using a dual iPad charger and power USB cables as described in the first link below.
The second and third links are items from Amazon which might work.
http://reviews.cnet.com/8301-13746_...-at-once-with-qmadix-twin-tablet-charger-4.2/
http://www.amazon.co.uk/Scosche-reVOLT-Charger-without-Cable/dp/B0077PM3KG
http://www.amazon.co.uk/PortaPow-Ra...TYUE/ref=sr_1_2?ie=UTF8&qid=1357754579&sr=8-2
Have you tried to charge your nexus 4/10 with a 2.1a apple USB port? I tried it with both my nexus 4 and 7 and they do not deliver more than 1a. I just ordered the powergen dual USB. It will only give 1a to android devices according to the guys at the nexus 7 forums. 1a is enough to slowly charge my nexus 7 in the car with maps running but im not sure about the nexus 10. We need a car charger specifically made for android tablets that can output more than one amp but I don't know if there are any on the market yet.
neotekz said:
Have you tried to charge your nexus 4/10 with a 2.1a apple USB port? I tried it with both my nexus 4 and 7 and they do not deliver more than 1a. I just ordered the powergen dual USB. It will only give 1a to android devices according to the guys at the nexus 7 forums. 1a is enough to slowly charge my nexus 7 in the car with maps running but im not sure about the nexus 10. We need a car charger specifically made for android tablets that can output more than one amp but I don't know if there are any on the market yet.
Click to expand...
Click to collapse
If you read the article in my first link above then that says that a dual iPad charger with the correct cable should deliver 2.1A.
Here are some Amazon customer reviews showing that a dual iPad charger can charge a Nexus device at 2.1A when using the correct USB charger cable.
http://www.amazon.com/Qmadix-QM-DMC...iewpoints=1&sortBy=bySubmissionDateDescending
Gaugerer said:
If you read the article in my first link above then that says that a dual iPad charger with the correct cable should deliver 2.1A.
Click to expand...
Click to collapse
Unless someone tested it with the nexus 7 or 10 im still skeptical. Anytime you see the 2.1a it's designed for the Ipad. Just read that article and it doesn't say anything about android tablets just ipads. Im sure they do output 2.1a but just to ipads, android devices will only get 1a.
Sorry for offtopic a bit but is it okay to use 2A to charge the N4?
I mean does it kill the battery faster or it is totally fine?
THanks
Gaugerer said:
Here are some Amazon customer reviews showing that a dual iPad charger can charge a Nexus device at 2.1A when using the correct USB charger cable.
http://www.amazon.com/Qmadix-QM-DMC...iewpoints=1&sortBy=bySubmissionDateDescending
Click to expand...
Click to collapse
i just read the reviews, just because it shows AC charging it does not mean its output is 2.1a. AC charging just means that its using a charger or cable that has the D+/- pins shorted. I have a moto 700mah car charger that shows AC to both my nexus 4/7 but only delivers around 6-700 mah. What im saying is that it probably wont output more than 1a to an android device. 1a is more than enough to charge a nexus 4(or any other android phone) with nav on but is a bit too slow for tablets. If you do get this car charger let us know if it does output more than 1a. you can use current widget app to find out how much current the phone is receiving from the charger. Im still looking for a car charger that can deliver more than 1a to an android device.
Emama said:
Sorry for offtopic a bit but is it okay to use 2A to charge the N4?
I mean does it kill the battery faster or it is totally fine?
THanks
Click to expand...
Click to collapse
yes it's fine. The nexus 4 will not draw more current than is safe for the battery.
Emama said:
Sorry for offtopic a bit but is it okay to use 2A to charge the N4?
I mean does it kill the battery faster or it is totally fine?
THanks
Click to expand...
Click to collapse
Wrong post
neotekz said:
i just read the reviews, just because it shows AC charging it does not mean its output is 2.1a. AC charging just means that its using a charger or cable that has the D+/- pins shorted. I have a moto 700mah car charger that shows AC to both my nexus 4/7 but only delivers around 6-700 mah. What im saying is that it probably wont output more than 1a to an android device. 1a is more than enough to charge a nexus 4(or any other android phone) with nav on but is a bit too slow for tablets. If you do get this car charger let us know if it does output more than 1a. you can use current widget app to find out how much current the phone is receiving from the charger. Im still looking for a car charger that can deliver more than 1a to an android device.
yes it's fine. The nexus 4 will not draw more current than is safe for the battery.
Click to expand...
Click to collapse
Thanks for your reply. I've ordered the charger and the USB power cable and I'll report back.
I use this
http://www.myinnergie.com/mCubeDC10/Default.aspx
Bought it when I had an iPhone and it could charge it and an iPad at the same time.
Now I use it with the SGS3 and the Nexus 7, works fine for both and they pick it up as AC.
Sent from my Nexus 7 using xda app-developers app

Can you use a regular USB charger?

Can you use a regular micro usb charger in place of a 3.0 cable?
Thank you for the help
Yes, no problem. In fact with my S5 there is only a usb 2 cable supplied.
admiral70 said:
Can you use a regular micro usb charger in place of a 3.0 cable?
Thank you for the help
Click to expand...
Click to collapse
Yup, you sure can.
Just an FYI: The USB3 cable is in fact micro USB as well. It's just the USB3 version of microUSB. The USB3 port on the phone is backward compatible, so a USB2 cable will work just fine in there. :good:
Yep it will work
Sent from my SM-G900P using Tapatalk
So which will charge quicker the stock charger or my nexus 7 charger?
I think they are both 2 amp chargers. What is the advantage of the extra plug on the charger?
bhess said:
So which will charge quicker the stock charger or my nexus 7 charger?
I think they are both 2 amp chargers. What is the advantage of the extra plug on the charger?
Click to expand...
Click to collapse
It's USB 3.0. You'll get faster data transfer speeds when plugged into a USB 3.0 port on a computer.
bhess said:
So which will charge quicker the stock charger or my nexus 7 charger?
I think they are both 2 amp chargers. What is the advantage of the extra plug on the charger?
Click to expand...
Click to collapse
faster data transfer rate.
OK thanks.
So the charging rate is the same depending on the "block" amps?
I think the USB 3.0 charges faster even if it's still the same 2A charger
Sent from my SM-G900P using Tapatalk
bhess said:
OK thanks.
So the charging rate is the same depending on the "block" amps?
Click to expand...
Click to collapse
It would seem so, yes. In re: max charging amps, it seems that the S5, much like the Note 3, will charge only at 1200mA while the screen is on and 1800mA otherwise. See discussion here: http://forums.androidcentral.com/sa...48184-galaxy-note-3-max-charging-current.html
To the OP, thanks for starting the thread... I hadn't even realized that the new Micro USB 3.0 connector actually was backwards compatible with the older MicroUSB 2.0 for charging!
Great link thanks!
Yep Confirmed!

Quick Charge 2.0 Accessories

I know Google mentioned the 6P can charge quickly, but I don't recall hearing anything saying "QuickCharge 2.0 compatible". If it is compatible, which accessories are recommended? Based on a quick Amazon search, I've found:
Car Charger
Would it be possible to pair this with a USB A to USB C cable? I need to purchase all new adapters as I was relying on Qi charging pads. I need many new adapters, and just need to know which ones to purchase. Thanks!
I was wondering the same. The charger is 5v/3A rather than variable voltage
Sent from my SM-G920V using XDA Free mobile app
Yea... I have the same question.. I have a couple quick charge 2.0s.. can I get a standard usb to usb-c adapter like https://store.google.com/product/usb_type_c_to_usb_standard_a_plug_cable and plug it into quickcharge and will i get quickcharge capabilities?
I have the same question, i think we have to wait some guys to receive the sample and confirm if the Nexus 6P support qualcomm quick charge 2.0
for the car charger, here is my recommend.
You don't need to get another type c cable, just plug and charge.
Didn't Qualcomm announce quick charge 3.0 too?
Sent from my Nexus 6 using Tapatalk
Cheater912 said:
Didn't Qualcomm announce quick charge 3.0 too?
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
coming with the 820, I believe
This phone supports USB 3.1 and USB Type-C so therefore it supports the new usb power delivery spec which is capable of up to 100w. If I were to bet money, I would say google is referring to this as "quick charging", not to be confused with Qualcom's implemntation.
http://www.extremetech.com/computin...its-way-alongside-usb-3-1s-10gbit-performance
Doesn't have 3.1. Still 2.0
Sent from my Nexus 6
Google has stated it does not support QuickCharge 2.0 but just the faster charging that USB C allows for.
MoNsTeReNeRgY22 said:
This phone supports USB 3.1 and USB Type-C so therefore it supports the new usb power delivery spec which is capable of up to 100w. If I were to bet money, I would say google is referring to this as "quick charging", not to be confused with Qualcom's implemntation.
http://www.extremetech.com/computin...its-way-alongside-usb-3-1s-10gbit-performance
Click to expand...
Click to collapse
Not all USB type c devicess have to support 3.1 and power delivery. The 6p supports neither.
Sent from my SHIELD Tablet using Tapatalk
donatom3 said:
Not all USB type c devicess have to support 3.1 and power delivery. The 6p supports neither.
Sent from my SHIELD Tablet using Tapatalk
Click to expand...
Click to collapse
You are correct, some tech sites were originally posted that this phone supported USB3. Its now been confirmed that its only USB 2.
donatom3 said:
Not all USB type c devicess have to support 3.1 and power delivery. The 6p supports neither.
Sent from my SHIELD Tablet using Tapatalk
Click to expand...
Click to collapse
You say that the 6P doesn't support "power delivery". How is Google providing 15W to the phone via it's Type-C charger? From what I understand, the pins for Vbus in the Type-C cable/plug is the only way to provide that power? As you can see, I'm a little confused.
CNLiberal said:
You say that the 6P doesn't support "power delivery". How is Google providing 15W to the phone via it's Type-C charger? From what I understand, the pins for Vbus in the Type-C cable/plug is the only way to provide that power? As you can see, I'm a little confused.
Click to expand...
Click to collapse
Maybe they used their magic to find a better way to do it
**Delete**
Now I'm totally confused... so this doesn't support the same quick charging that's in the current line of micro USB phones, such as the Note 5 and S6? And it doesn't take advantage of the newer USB type C technology that allows for faster charging? So how the heck does it provide a "quick charge" for a quick boost in battery?
Here is a great article explaining Quick Charge and why the 2015 Nexus devices (possibly) do not have it; link
opt05 said:
Here is a great article explaining Quick Charge and why the 2015 Nexus devices (possibly) do not have it; link
Click to expand...
Click to collapse
This was incredibly informative, thank you!!!!!!!!!
CNLiberal said:
You say that the 6P doesn't support "power delivery". How is Google providing 15W to the phone via it's Type-C charger? From what I understand, the pins for Vbus in the Type-C cable/plug is the only way to provide that power? As you can see, I'm a little confused.
Click to expand...
Click to collapse
I think the wikipedia page may have been missing something important in what I quoted from them. That "Power Delivery 2.0" doesn't have to be supported for a Type-C cable. Based on the wattage of the new chargers though it does look like Power Delivery 2.0 is being used, just not the full 100 watts that Power Delivery 2.0 does support, but it's definitely over the 7.5 watt limit of usb 3.0.
What's important to note is that Power Delivery 2.0 can be supported on Type C cables with usb 2.0.
opt05 said:
Here is a great article explaining Quick Charge and why the 2015 Nexus devices (possibly) do not have it; link
Click to expand...
Click to collapse
Helpful article, just not news I wanted to read.
I have 3 QC 2.0 adapters, and 1 QC 2.0 car charger. Luckily, I did just purchase this http://amzn.com/B0146FK3G0 for $12 using a coupon code. This should charge the Nexus 6P at 15W since it's a native USB-C charger, with an additional QC 2.0 port. Just need to find another wall adapter now.
Powell730 said:
Helpful article, just not news I wanted to read.
I have 3 QC 2.0 adapters, and 1 QC 2.0 car charger. Luckily, I did just purchase this http://amzn.com/B0146FK3G0 for $12 using a coupon code. This should charge the Nexus 6P at 15W since it's a native USB-C charger, with an additional QC 2.0 port. Just need to find another wall adapter now.
Click to expand...
Click to collapse
The specs say that the Type-C port only does 5V/2.4A (12W) so you're not going to get fast charging off of that on your 6P (which needs 15W). You need to find something that does 5V/3A over Type-C.

can google 60W usb C charger charge my nexus 6p?

it is all in the title .
is it safe to use google 60W usb C charger to charge my nexus 6p?
it will be great to use the same charger for both my macbook 12 and nexus 6p
FYI i checked in google store for the specifications, this is the DC output for the 60W charger :
DC Output
5V 3A
12V 3A
20V 3A
can some one answer please..
Yes.
Sent from my SM-G530H using Tapatalk
Link to charger?
NCguy said:
Link to charger?
Click to expand...
Click to collapse
I cannot post links yet. but you can use the search term "google 60W usb C charger" and it will be the first result
https://store.google.com/product/universal_type_c_60w_charger
I realize it's leading-edge gear but still seems a bit pricey for a single-port, high-output charger
... Will this fast charge the 6P?
Sent from my Nexus 6 using XDA Free mobile app
SymbioticGenius said:
... Will this fast charge the 6P?
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
Yes.
NCguy said:
Link to charger?
Click to expand...
Click to collapse
I realize it's leading-edge gear but still seems a bit pricey for a single-port, high-output charger[/QUOTE]
it is not a cheap one . but compared to apple macbook charger, it is a better deal.
Moreover, now you are confirming that it will charge the 6P also, i think it will better than getting a spare charger for each device.
this one has two ports, you can use your own cables and is $20 cheaper. I understand it is less power than the other how ever its more than enough to fast charge the 6P. https://store.google.com/product/usb_c_dual_port_charger
DukeofPhone said:
this one has two ports, you can use your own cables and is $20 cheaper. I understand it is less power than the other how ever its more than enough to fast charge the 6P.
Click to expand...
Click to collapse
this is excellent for those who are planning to get a USB C power bank as it is possible to charge it through a mico-usb or USB C ports. For sure the type C will charge the power bank faster.
here is an example of a USB C power bank from RAVPower by the way:
www .ravpower.com/20100mah-external-battery-charger-QC2.0-type-c.html
Specifications:
Input (Micro): 5V/9V/12V 2A Max
Input (Type-C): 5V/3A Max
USB Output: 5V/ 2.4A
Type-C Output: 5V/3A Max
QC 2.0 Output: 5V/2.4A, 9V/1.5A, 12V/1.2A Max
Click to expand...
Click to collapse

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