Whenever I connect my Phone to my Laptop(Matebook X Pro), it quick charges my phone. (connection via usb c to usb c)
Is there a way I can stop that from happening and my phone leeching the battery from laptop so fast? OR stop charging it all together
Because usually I only connect my phone to laptop for roms and rooting and today for Android Q. I would charge my phone before doing these things hence I don't need my phone to suck out from laptop during this. I wonder if there is a way to reduce how much power the laptop is outputting. or turn it off all together
Besides, I have a powerbank for both my laptop and phone so if I am out and about, I'd charge the phone from the battery, it's less efficient to send it from battery to laptop to phone.
You'll probably need a custom kernel with special settings for that, as they usually try to speedup the charging instead, but I recall some bugged kernel/ROM versions (for another device that was; the Nexus 6P) which prevented fast-charging when not using an official QC adapter (like connecting it to the charge USB-port of your laptop; and that kinda sounds like what you're after). Many modern laptops have special charger-ports, sometimes even with QC support, so did you try another USB-port to see if perhaps charges slower ?
SKiLLa XP said:
You'll probably need a custom kernel with special settings for that, as they usually try to speedup the charging instead, but I recall some bugged kernel/ROM versions (for another device that was; the Nexus 6P) which prevented fast-charging when not using an official QC adapter (like connecting it to the charge USB-port of your laptop; and that kinda sounds like what you're after). Many modern laptops have special charger-ports, sometimes even with QC support, so did you try another USB-port to see if perhaps charges slower ?
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You see, when I'm out and about I only carry usb c to USB c cable so I can't check other ports. Both of the USB C ports are USB PD :/
Sent from my Xiaomi MI 9 using XDA Labs
Use a cheap legacy micro usb cable plus type c adapter. Since its hard to find bad quality usb c cable. It wont pass high current to your phone. Bad quality cable usually have very thin wire..
Related
I came across this hub:
http://www.monoprice.com/products/p...d=1030702&p_id=9955&seq=1&format=1#largeimage
Looks pretty nice, all USB 3.0 ports, capable of supplying a 900ma of power to each port. Good for all sorts of things, not just a tablet being connected to the computer.
What I was wondering about this is would it be possible to open it up and short the data pins so that it is only capable of being a charging device? If so, it probably wouldnt even need a connection to a PC, just need to be plugged into the power adapter. I am wondering on this because if possible, that would mean when only using 1 port it (theoretically) would be capable of sending 3.8A out to the one device if the device tried to pull that much. Since the tablet would see the shorted connection it should at least try to pull 2A. Anyway, I just thought it would be a fun project to try and modify in this way. I will probably get it soon and attempt this myself, and might even look into beefing up the internal power circuit area to make sure it can safely send 3+ amps out one port if asked to. It would be nice to use this in conjunction with a pogo connector and finally be able to charge faster than the tablet drains while gaming.
EniGmA1987 said:
... Looks pretty nice, all USB 3.0 ports, ...
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Nexus 10 USB specs "microUSB v2.0"
http://www.gsmarena.com/samsung_google_nexus_10_p8110-5084.php
Would you get value from USB 3.0 ports with a USB v2.0 interface?
To get the full USB 3.0 power of 900mA, the device has to be configured as a USB3.0 device. The hardware developer USB 3.0 command verifier tool is separate from the USB 2.0 one
I thought we had also verified the USB connector and the POGO connector are mutually exclusive in power terms, even if the charging circuit inside the Nexus 10 could be modified to accept more than 2.5A.
skally said:
To get the full USB 3.0 power of 900mA, the device has to be configured as a USB3.0 device. The hardware developer USB 3.0 command verifier tool is separate from the USB 2.0 one
I thought we had also verified the USB connector and the POGO connector are mutually exclusive in power terms, even if the charging circuit inside the Nexus 10 could be modified to accept more than 2.5A.
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Sorry, I dont scour the threads in accessories every day so thats news to me. Besides, I dont even know what "mutually exclusive" is supposed to mean in relation to this. If the pogo connector has a USB end and draws 2A from the power adapter, why wouldnt it be able to draw 2A from any source capable of putting out that much power? Your trying to tell me that the pogo connector somehow signals it is a USB2.0 device? If thats the case it wouldnt be able to draw more than the 500mA. The regular power adapter has a USB output connector after all and it can send 2A just fine. This hub has its own power adapter and doesnt try to draw the full 3.8A through a computer connection. What is the difference between the power adapter that comes with the tablet and a hub that has its own PSU to output that much and more power?
and yes I know it wouldnt transfer at 3.0 data speeds since the tablet has a 2.0 port, but I wouldn't be using the USB port on the tablet. But why would the USB somehow signal that it will only send 500mA through the pogo connector?
EniGmA1987 said:
Sorry, I dont scour the threads in accessories every day so thats news to me. Besides, I dont even know what "mutually exclusive" is supposed to mean in relation to this.
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Click to collapse
Mutually exclusive: charge from POGO or USB, but not both at the same time
EniGmA1987 said:
If the pogo connector has a USB end and draws 2A from the power adapter, why wouldnt it be able to draw 2A from any source capable of putting out that much power? Your trying to tell me that the pogo connector somehow signals it is a USB2.0 device? If thats the case it wouldnt be able to draw more than the 500mA. The regular power adapter has a USB output connector after all and it can send 2A just fine. This hub has its own power adapter and doesnt try to draw the full 3.8A through a computer connection. What is the difference between the power adapter that comes with the tablet and a hub that has its own PSU to output that much and more power?
and yes I know it wouldnt transfer at 3.0 data speeds since the tablet has a 2.0 port, but I wouldn't be using the USB port on the tablet. But why would the USB somehow signal that it will only send 500mA through the pogo connector?
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The POGO connector, although it connects to a USB port, is not bound by the USB specification for how much it can draw. USB chargers are available that can deliver up to 3A, but it's up to the device to request this much power.
The specifications for USB 2.0 of 500mA (and 900mA for USB 3.0) are for a power and data connection, but their is an added specification for power only of 1.8A (and 5A for USB 3.0). a hub will generally adhere to the power and data specification, while the USB PSU has no data functionality (this is determined by their being a short circuit on the D+/D- USB pair).
The reason a USB 2.0 device will not draw 900mA from a USB 3.0 port, is because it's the device that negotiates the connection, and as a USB 2.0 device, it will only request the 500mA maximum from the USB 2.0 specification.
Try to think of it this way: an incandescent light bulb will not be any brighter if you increase the power source current.
Ok, but you just said everything I was talking about. So when I modify the hub to get rid of the data connection, and not even connect it to a computer and just have its power supply connected, how would that be different than simply a normal charger? The tablet would be charging through its pogo connector, and it simply plugs into the hub with a 3.8A power supply. So it wouldnt have anything to do with any USB limits then right? Cause the hub is USB3.0 ports capable so it is not like a USB 2.0 hub that wouldnt have the proper internal circuitry to push the 3.8A I will be trying to draw.
EniGmA1987 said:
Ok, but you just said everything I was talking about. So when I modify the hub to get rid of the data connection, and not even connect it to a computer and just have its power supply connected, how would that be different than simply a normal charger? The tablet would be charging through its pogo connector, and it simply plugs into the hub with a 3.8A power supply. So it wouldnt have anything to do with any USB limits then right? Cause the hub is USB3.0 ports capable so it is not like a USB 2.0 hub that wouldnt have the proper internal circuitry to push the 3.8A I will be trying to draw.
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If you short the D+/D- pins, you can then use the hub as a standard charger PSU, capable of delivering 3.8A.
The issue is that current gets pulled, not pushed. It doesn't matter how many Amps you provide, the Nexus 10 charging circuit is only capable of pulling a maximum of 2.5A. (datasheet for the charge circuit can be found here).
From earlier posts (in one of the POGO threads, I think), there were found to be kernel limits restricting the SMB347 charging to 2A.
Can anyone enlighten me as to what the exact difference is between these two USB cables? Are they wired differently internally or is it just a difference in the quality of the copper used?
I have tried several USB "charging only" cables to connect my GT-N7000 to a PC. Some will data synch and allow file transfers but only in one direction and only some of the time, some of them won't connect at all ie are charge only.
At least one cable I bought from a leading IT store stated "USB Data/Synch" on the packaging but only works as a data/synch cable on a Windows XP netbook but NOT on my Windows 7 x 64 desktop PC. It won't connect for data synch at all on the desktop.
I have Samsung's USB drivers installed on both machines.
Only the original Samsung Data/Sych cable works reliably for both charging and data synching on both my PCs.
Can anyone tell me what's going on?
Thanks in advance
Trevor
All of those cables sound non-standard. A decent charging cable like the original Samsung one will likely have all 5 pins: power, data-, data+, ground and the other one which I can't remember. The power will be rated at at least an amp for charging and it should all work fine.
Power only cables may just have power and ground to keep costs down and some data cables are only rated at 500mA as that is to the USB spec.
I'd just get another Samsung cable, pretty cheap on play.com.
Sent from my GT-N7000 using xda app-developers app
Nexus 7 (2013) with OTG and charging at the same time.
NO MODE NEEDED
[Little Intro]
I bought a Nexus 7 (2013) to use as a personal computer.
I admit, I've ****ed up the device a few times experimenting with kernels and stuff.
The thing is, you just need it rooted to use USB reading. Then you think: ok, I'm using USB and external HDs, I'm using mouse and keyboard, a external all-in-one Card Reader, and even a device that communicates with an XBox Wireless controller, but using as a computer the battery will go quickly.
I've tried two Android Cyanogen's distros and ****ed up the device 6 times. So I kept the default kernel rooted, plugged into the USB Hub device and said: well, **** off.
The thing is, when using the device I've noticed it was charging, but not saying it was charging.
[Explanation]
With my little technical knowledge of electronics I can explain what happens here.
The kernel does not support the use of OTG and charges at the same time: that is theoretical, saying that in software is not the same that measuring that.
So, what if the system charges but it just do not know?
Even if the both sides have the same potencial difference (I guess that is called voltage in english, a term disregarded in my born language, sorry about my english by the way), what if one side is providing a larger current? In theory the other side will charge, if it is a battery.
So, what actually happens is that the Nexus 7 charges, but the system level software, that, in theory, do not permit that, just do not show what is actually happening.
Obs.: I've tested the USB-Hub into my computer and it accuses overvoltage, and then when plugged to my computer I need to turn off the external power of the gadget. So, it is probably because of the specific gadget I'm using.
[Little things]
That could, may, just be possible with some specific equipment, so I will post the exactly equipment I'm using, and how I'm using it.
I ask you guys just try without the power loop I'm using to know if it is necessary, and the Nexus 9 guys to test if the same happen with it.
[The equipment]
My USB-Hub: www.dx.com/p/7-ports-powered-usb-hub-678
My OTG cable: www.dx.com/p/micro-usb-male-to-usb-female-w-usb-male-otg-cable-black-170927
[How do I connect it]
I connect the OTG cable by the male micro-USB into the tablet, loop the power with the male-USB into any USB port of the hub and connect the female-USB into the default hub main port - that one that is not the default USB-like format.
I power the USB hub and that's it. I'm using a Logitech dual transceiver with mouse and keyboard, the default microsoft XBox USB gadget, a generic all-in-one card reader and a 4GB Seagate external HD plugged into the hub.
[A final little thing]
Yes, it does not charge quickly, and yes, sometimes the battery level will be consumed a little bit. But it works well generally, without any mode needed.
It seem that is not the same as in powering mode. I'm thinking in to build an image that permits to choose between on or off in the USB out port. Can someone guarantee me that this is what the Cyanogen kernels do?
Kernel mode differences
Just to be clear, the "original" kernel mode can't know that it is charging and accessing the OTG at the same time, even doing it.
Maybe, and just maybe, the other kernel modes just let the kernel know it, having no difference to the original kernel. That's a big maybe, but a possible one.
I'd expect someone to confirm that the kernel modes "cut off" the voltage, and because of that may charge faster. Someone?
Hi all,
I was wondering if anyone knew of a USB Y cable (with two male usb plugs converging into one female usb port) that could allow quick charge and data transfer so it could be used with Android auto? Both male usb plugs would need to be able to transfer data into the female usb port in order for this to work.
Sent from my XT1572 using Tapatalk
I guess this wouldn't work and might also damage the head unit, but I'm no engineer.
If I were adventurous enough to risk frying my head unit and/or phone, I would follow this
http://www.instructables.com/id/Add...-hub/step3/Cut-the-VCC-wire-of-the-USB-cable/
and connect the output of the quick charge car adapter instead of the external charger.
Then would cut the Vcc wire directed to the head unit.
I don't know if the main hub cable (the one which normally goes to the PC) has to go to the phone or the head unit: who's the host in Android Auto? I'm inclined to think it's the head unit, since the phone connects in mtp mode. So my first guess is main hub cable to head unit, quick charge adapter connected like in the article, then big usb to micro usb cable to phone.
Maybe voltage higher than 5V would fry the hub, and maybe Android Auto connection is so picky (and it's picky, you know) that the hub circuitry wouldn't allow it. Who knows.
Again I'm no engineer and I'm scared to try
But I would buy a safe device tested for this use case, 10/10 :laugh:
Sent from my Galaxy Note 4 using XDA Labs
Use a usb y, but don't short the data pins to send it to high charge/current mode. You won't necessarily hurt the hu but you'll never connect to AA, the phone must detect the shorted pins to enter high charge mode. Which means the phone can't talk on the data wires. I find a 2a charger running at 1a plus the hu's usb keeps just ahead of the power usage.
Sent from my SM-T520 using Tapatalk
glowsti047 said:
Hi all,
I was wondering if anyone knew of a USB Y cable (with two male usb plugs converging into one female usb port) that could allow quick charge and data transfer so it could be used with Android auto? Both male usb plugs would need to be able to transfer data into the female usb port in order for this to work.
Sent from my XT1572 using Tapatalk
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Click to collapse
Unfortunately, you can't have quick charge (2.0) and data transfer at the same time (at least with my Galaxy note 4). On a standard USB cable, you have 4 wires, two for data, two for power. On my GN4, the data pair communicate with the quick charger (I'm not sure exactly what the communication is, I remember reading somewhere it used the data pairs to communicate voltage, etc...).
Now, what I did do, was make my own data cable using 2 male type A adapters and connecting it all up to a a male microUSB end(Data pair is only connected to 1 of the type A male ends, I can't remember if I wired up the power in parallel). My AA head unit puts out less amps than my car charger, so even though I'm not getting quick charge speeds, I'm getting a bit more amps to charge with. So, one male end goes to my charger, one end goes to my head unit. I've been using it like this for over a year with no issues.
How much better is it than charging while connected to the AA head unit? Not sure. I'd rather have more amps than not enough.
Just buy a y. Cheaper and safer than self making.
Sent from my SM-T520 using Tapatalk
Nova5 said:
Just buy a y. Cheaper and safer than self making.
Sent from my SM-T520 using Tapatalk
Click to expand...
Click to collapse
Do you have a link? Can't seem to find anything that I think would work.
Sent from my SM-N910P using Tapatalk
Something like this: https://www.amazon.co.uk/Enhancer-Female-Data-Charge-Charge-Extension/dp/B00NIGO4NM
Sent from my Nexus 6P using XDA-Developers mobile app
Hi,
I want to clarify some aspects:
1) Qualcomm's Quick Charge doesn't work when the USB is in use for data.
2) Quick Charge requires a certified adapter (as it's an active function).
3) USB power can charge the device, however very slow... in fact with AA the device consumes battery when running.
So, my question is:
- Increasing the USB power current with an Y cable the device can be charged more quickly?
- And if this is true: the Y cable needs to block the current from the dta USB port of the car?
I like to comment these topics.
First it must be USB type c to USB A. 3.0
What USB standard nobody seems to know. For sure but most tell me its a USB 3.0 At the A end.
And USB Type C at the other end.
Next we need to know what is required in the cable to support Dex.
Next we need to know what is required to support Samsung Fast Charge standard. I hear its not the same as Quick Charge.
Is there any cable out there that does all these things.
I know the cable that comes with the phone does not do this.
i.e. I fails in the USB transfer speed dept.
In short.
Dex compatible,
Fast Charge compatible. As per this link we only need Fast Charge 2.0
But I wonder why does Samsung Claim to use its own standard. i.e. what is the diffirence between the Samsung standard and QC standard.
https://www.qualcomm.com/media/documents/files/quick-charge-device-list.pdf
USB 3.0 Standard compatible for high speed data transfer.
(They say if the USB A port is blue and has more than 4 pads it will work).
Ps: So far I have figured that my wifes One Plus 6 cable does all these jobs.
Answering my own question.
Got to amazon.
Search using this text usb type c to usb a 3.1
I got an amazon Basic from the search the USB A port is blue in color an indication that it is 3.0 It does everything Dex, fast speed transfer and fast charge.
Glad that you managed to get your cable. But for future reference any standard USB A 3.0 - Type - C charging cable will be good. However beware of multi-plug to USB A 3.0 cables as they don't have the best charging speeds, unless you have a high wattage power supply.
I'm using a nice quality INIU cable, has nice quality braided cover, a led for dark car charging, to see cable.