Database Develop

Doesn't Charge From Mains But Does From USB?

My HTC Diamond has developed an interesting problem
It will not charge from a mains supply but it DOES charge when connected to a USB port of a computer
Does the mains electricity pass through the same USB pins as the USB juice?
I am thinking a pin on the Mini USB socket on the Diamond might be broken?
Any other ideas? - is there anything software related that could be causing this?
I have stock ROM
Fanks

Bit of an (embarrassing) update
My mains powered docking station was not working (and still isn't)
To verify the problem I tried charging the device from the supplied mains charger in my kitchen - which also didn't work so I concluded the issue was with the HTC Diamond itself, especially as it charged from my laptop's USB port
HOWEVER - I just went to make a cup of tea and the kettle didn't work - the mains in the kitchen had tripped out - now reset the mains charger is working fine (PHEW!)
The issue is therefore my docking station and NOT the HTC Diamond
For info I did manage to find out the mains chargers DO use a different method to charge than USB connection
Mains is referred to as "Fast Charging" and shorts some pins to supply max power (and faster charging) of 1,000mA
USB power uses the standard 500mA from the USB supply so takes longer to charge and delivers it through the power pin on the USB pinout
Irrelevant now but it may help somebody else searching for a similar issue
I am now going to enjoy that cup of tea and hide my embarrassment!

Charging and chargers

Hey, after some time with my D4 I decided to sum up and ask about my charging problems
The first issue I ran into was unresponsive/randomly misbehaving touchscreeen after plugging into generic USB charger through my data cable. I blame the charger's voltage - I measured 5.45V on it, it was supposed to be 5V/1A... It was just a $3 charger though so no big deal. It works fine with OEM Sony Ericsson charger giving out 4.95V and (per sticker) 750mA.
What I found out later is that it does not charge from a laptop that is off but with USB powered (Lenovo R500). I double checked it gives the juice out by charging my BT hands-free. I guess it measures the current (as standard USB gives out 500mA) and tests the data connection for low currents. It still charges pretty slow from the computer though. I can have the computer turned on, but my old solar charger with battery has the same issue which is really inconvenient :-/
I would greatly welcome any tested mod to the cable, maybe soldering pins 4 and 5 on the micro USB end, as it worked for my old E-TEN X800?

For the voltage issue:
How did you measure the 5.45V? With nothing connected?
Those low-quality power adaptor does not have good voltage regulators, and the voltage will drop when you are charging. Therefore the zero loading voltage is slightly higher.
For the charging issue, it's nothing related to your notebook, but Android itself.
When android detected it is a USB connection, it limits the charging current to avoid damage of the USB port of the computer. If you solder a USB cable with only power pins connected but not data pins, you will get much faster charging rate.
Moreover, AOKP ROM have a "Fast Charge" option (Settings --> ROM Control --> Performance --> "Other Settings" Page), which simply disable USB functionality to force the phone charges as using a power adaptor

KinChungE said:
For the voltage issue:
How did you measure the 5.45V? With nothing connected?
Those low-quality power adaptor does not have good voltage regulators, and the voltage will drop when you are charging. Therefore the zero loading voltage is slightly higher.
For the charging issue, it's nothing related to your notebook, but Android itself.
When android detected it is a USB connection, it limits the charging current to avoid damage of the USB port of the computer. If you solder a USB cable with only power pins connected but not data pins, you will get much faster charging rate.
Moreover, AOKP ROM have a "Fast Charge" option (Settings --> ROM Control --> Performance --> "Other Settings" Page), which simply disable USB functionality to force the phone charges as using a power adaptor
Click to expand...
Click to collapse
I've tried a couple of the "power only" USB cables that presumably don't have the data pins connected, but my Droid 4 fails to recognise when they are connected (even if you try it with a power supply, rather than a computer's USB port). I'm not sure whether one of the data pins needs to be connected to ground or something to make it realise it's connected?
Cheers,
Steve.

Back powered hub

I am trying to modify a powered hub so that i can charge the nook and power accessories at the same time. There is a picture below with the information i have found out so far. I can see the diode that i am supposed to bypass, and once a jump it as seen in the picture i can charge the nook, but it will then not connect to any devices even when in usb host. Bother usb host and vbus will be selected but if i have the barrel plug connected then any device i have connected to the nook disconnects. Just fyi, the wire connected to the spot where it goes to the 5v on the usb plug, goes nowhere. Its only there for testing purposes.

[Q] Z3c won't charge on DK48 dock

So, I have the official Sony DK48 dock for my Z3 Compact (no case). The phone will recognize that it is connected to the dock by giving the notification sound, but the battery will not charge while on it. I've tried wiggling it all sorts of different ways, and tried at least 3 different USB cables, but still no dice.
Is anyone else having this issue?

Have you used original cable? I had this problem with some poor quality cables, they were too thin inside for the designed current

plug it in the mains...

techguyone said:
plug it in the mains...
Click to expand...
Click to collapse
With 'mains' you can mean so many things.
I guess you mean plug the cable in an electrical outlet, rather then in a computer. I believe that I had the same issue. (Worked fine in an outlet)

The DK48 will only charge the phone when power comes from the mains. It does not charge the phone when connected to a USB port of a PC or laptop.
Use the original charger and the original cable that came with your phone and the Z3/Z3C should charge just fine in the DK48; that's at least what my does.

Yes all of my attempts occurred while plugging the dock into the AC adapter that came with the phone.

I guess then it seems like its a faulty DK48...
It should work with the original cable, adapter and electric outlet (not a PC).

Why wouldn't the DK48 charge through PC? How does it know? Amperes?

The input from the computer is too low even when you plug the USB to 3.0 port... Unfortunately you MUST use wall charger for the DK48 to be working.

Lazer72 said:
Why wouldn't the DK48 charge through PC? How does it know? Amperes?
Click to expand...
Click to collapse
I am a bit late in this thread, but I will post it anyway in case somebody has the same problem. Dk48 won't charge phone while connected to PC, because it checks if data lanes in Micro USB port are used. If they are, charging is stopped. If someone wants to charge phone using dock connected to PC (I for example connect it to my active USB hub, which is connected to my PC) it is necessary to use Micro USB cable, which doesn't use data lanes, just charging ones.
I hope it will help somebody.

Question charging the phone

Hello guys
I recently changed from S9+ to S21 and I have a question : I usually use my desktop computer to charge my phone during night while I sleep. (with data USB cable)
I have no problem when the desktop is on (under windows) : my phone charge (with USB cable) and I can transfert photos.
When my computer is off, when I plug the phone, the screen show the charging screen for 2 seconds and stops
I have no problem with my S9 to charge when the computer is off. (I know that there is an option in the bios to keep USB charging when computer is switched off)
It looks like the USB power is too low, and the S21 doesn't want to charge with it.
Maybe ther is an option in the phone to authorize this kind of charging ?

yan74s said:
Hello guys
I recently changed from S9+ to S21 and I have a question : I usually use my desktop computer to charge my phone during night while I sleep. (with data USB cable)
I have no problem when the desktop is on (under windows) : my phone charge (with USB cable) and I can transfert photos.
When my computer is off, when I plug the phone, the screen show the charging screen for 2 seconds and stops
I have no problem with my S9 to charge when the computer is off. (I know that there is an option in the bios to keep USB charging when computer is switched off)
It looks like the USB power is too low, and the S21 doesn't want to charge with it.
Maybe ther is an option in the phone to authorize this kind of charging ?
Click to expand...
Click to collapse
There isn't such an option in the OS as of now. It's possible that the S21 battery amp requirements are more than those of S9

Do you think the computer's USB port has a lower supply when the computer is turned off ?

We don't know what kind of computer you have, or what it's USB port capabilities are. That's something you can try to figure out, looking at your computer or manual for the computer's motherboard. Also check the BIOS settings, sometimes you can control the power state of the computer when it is "off" and whether power is still supplied to the USB ports (e.g., to allow the computer to boot up when it detects mouse or keyboard USB inputs).
As an example, my MSI motherboard has a feature where you can install software to set the USB ports to a high power output state, so you can power USB devices using more than the standard output current.
My Dell laptop has a USB port with a special symbol that means it's for high-power output for charging phones etc. So it can handle charging modern phones, and puts out more than 0.5 amps, but only for those USB ports with the special symbol (lightning bolt).
You'll need to just find out more information about what your computer is capable of.

I have a MSI gaming pro carbon X370 ( the optional wake by USB is on, without that, you're right, the USB are totally off and nothing will charge)
I did more investigations .... I tried all my USB cables and all USB ports and finally find 1 combination that works.
Only 1 of 12 USB cables worked ( the one took from an external HDD ) even the original cable supplied with the phone didn't work and nor a 100W Ugreen cable...
And only the front USB work. The different USB directly on the motherboard doesn't work with this phone, despite I always used them to charge many devices...
for information the working cable is a KAIBAO revision 3.0
Finally it doesn't work with this cable : it take longer before the phone stops to charge, but it stops too ...

Hi,
You need to check the power requirements of your new phone.
Thank you.