USB wiring for fast charge?

[chrisgull]

WP 8.1 warns that my car charger charges my 1520 slowly. What are the wiring criteria for fast charge on a 1520? Assuming charger can deliver voltage and current, of course.

 

[ttxzee]

If your charger can provide 1A at 5V, try changing your cable.. If the cable is low quality the voltage will drop within the cable and phone will not get the full 5V 1A.

 

[chrisgull]

If your charger can provide 1A at 5V, try changing your cable.. If the cable is low quality the voltage will drop within the cable and phone will not get the full 5V 1A.

Thanks... Really looking for wiring schematics at this point. Cable is not the issue.

 

[kki75]

To enable fast charging, the phone must detect USB D+ and D- are wired to each other. If not with what you have, you could cut and modify a USB cable, or modify the charger.

 

[lcavada]

Amazon sells small adapter that will do this for you.

Using the correct power source, your phone will charge faster.

 

[chrisgull]

To enable fast charging, the phone must detect USB D+ and D- are wired to each other. If not with what you have, you could cut and modify a USB cable, or modify the charger.

Thanks this is helpful.
Do you know of Samsung's android devices have the same requirement? I think my old N900 does.

 

[trwrt]

I think that is pretty much standard across phones, that data pins shorted means it's on an AC adapter rather than plugged into a laptop or whatever that can only deliver 500 mA. In another thread here people reported success with a "PortaPow" cable that's available from various sources, it comes with the pins already shorted and is apparently not too spendy.

 

[Aaron_Jones]

Thanks this is helpful.

Do you know of Samsung's android devices have the same requirement? I think my old N900 does.

Yes, they do. There are 4 pins to activate fast charge short pins 2 & 3 together. These are the data transfer pins. When the phone notice that these are shorted it knows no data transfer will happen and goes into fast charge mode.