Strange charging cable issue

J_B

I just swapped from Moto G7 to G31

The supplied charging cable works fine but the older cables that I have (E bay) won't charge.

All are USB to USB-c plugged into the same USB socket.

Why won't the generic cables charge the new phone?

flaneurs_lobster

Are you using a new charger supplied with the G31? 

shiraz99

J_B said:

I just swapped from Moto G7 to G31

The supplied charging cable works fine but the older cables that I have (E bay) won't charge.

All are USB to USB-c plugged into the same USB socket.

Why won't the generic cables charge the new phone?

I would understand if they're not capable of fast charging but surprised they don't charge at all.

J_B

flaneurs_lobster said:

Are you using a new charger supplied with the G31? 

When I use the supplied charger plug and cable, everything works perfectly ....

shiraz99 said:

J_B said:

I just swapped from Moto G7 to G31

The supplied charging cable works fine but the older cables that I have (E bay) won't charge.

All are USB to USB-c plugged into the same USB socket.

Why won't the generic cables charge the new phone?

I would understand if they're not capable of fast charging but surprised they don't charge at all.

  ..... but when I swap the supplied cable for a generic eBay USB-c cable (plugged into the same 3 pin to USB plug), it won't charge the G31, but it will charge the G7+

🤷‍♂️🤔

flaneurs_lobster

I can only imagine that the generic cable is a "charge only" (or is damaged to render it thus). The new phone may "talk" to the new charger to control the charge cycle.

Have you tried old charger-->old cable-->new phone?

J_B

flaneurs_lobster said:

I can only imagine that the generic cable is a "charge only" (or is damaged to render it thus). The new phone may "talk" to the new charger to control the charge cycle.

Have you tried old charger-->old cable-->new phone?

I have tried about 5/6 charger plugs -->three 'eBay' cables ( bought a 3 pack) --> new phone ............... no joy!

k_man

As suggested above, mobile charging involves a negotiation between charger and mobile. The cable may not support the charge types (too high/low resistance/inductance).

I assume as these were a 3 pack from eBay, they were at the value end of the spectrum...

Finally, it could be that the plugs on the eBay cables dont 'quite' fit.

J_B

k_man said:

As suggested above, mobile charging involves a negotiation between charger and mobile. The cable may not support the charge types (too high/low resistance/inductance).

In my ignorance, I assumed that a piece of wire was ... just that (I did fail my Physics A level sometime in the last century!)

I assume as these were a 3 pack from eBay, they were at the value end of the spectrum...

Of course - MSE, you know!

https://www.ebay.co.uk/itm/284295584136

Finally, it could be that the plugs on the eBay cables dont 'quite' fit.

The Moto supplied cable seems to work in all the plugs!

Replying above ...

Also ..

At the weekend, I borrowed a cable from someone's Bose (?) and that charged the phone just fine

Jenni_D

I think the "don't quite fit" comment was meant for the phone end not the charger end.

J_B

Jenni_D said:

I think the "don't quite fit" comment was meant for the phone end not the charger end.

Well, I would have assumed that USB-C was just that ... 🤷‍♂️

I tried wriggling and jiggling to no avail. 

Jenni_D

You'd think so, eh? But every standard has a tolerance, and eBay specials may treat those tolerance limits like the Pirate's Code ... more of a guideline than an actual code.