4 ms·

plz explain. I have something similar to these https://www.amazon.com/OffGrid-Blocker-Unwanted-Transfer-Protect/dp/B07985WW8C/ https://www.amazon.com/OffGrid-Bl

plz explain. I have something similar to these https://www.amazon.com/OffGrid-Blocker-Unwanted-Transfer-Protect/dp/B07985WW8C/ https://www.amazon.com/OffGrid-Blocker-Unwanted-Transfer-Pro... And it seems to charge quick enough (albeit never timed it)...

tzs 4y ago
The way USB high power charging works is that unless the charger and the device agree on high power the charger just charges at the older pre-high power USB rate. That's why you can plug ancient devices into a high power charger without worry that they will get fried. The way the charger and the device agree on how much power the charger should supply involves the data lines. Thus, if you simply drill out the data lines leaving just the power lines as the person a few comments up suggested a properly functioning high power charger will see your device as only supporting the original USB power spec. I suspect that those things you linked to are active USB devices. The USB port on the charge side has the data lines connected and uses them to negotiate high power from the charger. The USB port on the device side similarly has the data lines connected and uses them to negotiate high power with the device. It protects the device because the data lines on the charger side are not connected to the data lines on the device side.
- maerF0x0 4y ago
  > It protects the device because the data lines on the charger side are not connected to the data lines on the device side. or so we hope
- erik_seaberg 4y ago
  From what I’ve read, USB-A only had one pair of data pins and needed them to negotiate power delivery, but USB-C does not because it has a new configuration channel pin on each side (which is also used to negotiate modes for the many new data pairs, and detect being upside down). A 24-pin “serial bus” might be getting a little crazy.

tzs 4y ago

The way USB high power charging works is that unless the charger and the device agree on high power the charger just charges at the older pre-high power USB rate. That's why you can plug ancient devices into a high power charger without worry that they will get fried. The way the charger and the device agree on how much power the charger should supply involves the data lines. Thus, if you simply drill out the data lines leaving just the power lines as the person a few comments up suggested a properly functioning high power charger will see your device as only supporting the original USB power spec. I suspect that those things you linked to are active USB devices. The USB port on the charge side has the data lines connected and uses them to negotiate high power from the charger. The USB port on the device side similarly has the data lines connected and uses them to negotiate high power with the device. It protects the device because the data lines on the charger side are not connected to the data lines on the device side.

maerF0x0 4y ago
> It protects the device because the data lines on the charger side are not connected to the data lines on the device side. or so we hope
erik_seaberg 4y ago
From what I’ve read, USB-A only had one pair of data pins and needed them to negotiate power delivery, but USB-C does not because it has a new configuration channel pin on each side (which is also used to negotiate modes for the many new data pairs, and detect being upside down). A 24-pin “serial bus” might be getting a little crazy.