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Always distrusted public chargers and USB ports from the day they started becoming common. One way you can address this is by buying a power-only USB cable, wit

Always distrusted public chargers and USB ports from the day they started becoming common. One way you can address this is by buying a power-only USB cable, with the data lines cut. Unless there's any form of communication possible on the power lines in a USB cable (some diagnostic thing, etc) that can help protect you.

klodolph 7y ago
With the data lines cut you will be limited to 100mA, no? My personal experience is that this charges far too slowly.
rtkwe 7y ago
The downside to that is you lose a lot of the newer fast charge features. USB-C power delivery specifically requires communication between the charger and the device to determine what voltage the charger will provide.
- toomuchtodo 7y ago
  There are "USB Condoms" (I'm fond of the PortaPow, no association just a happy user, I give them away like candy to anyone who will take one) where one end negotiates with the USB source and the other end is for your device; you still can get max power but there is no data connection. https://portablepowersupplies.co.uk/home/portapow-data-blocker-usb-adaptor https://portablepowersupplies.co.uk/home/portapow-data-block...
  - rtkwe 7y ago
    That's just USB-A which only does one voltage at different current limits. USB-C has a whole negotiation back and forth about available (charger) and desired (device) voltages. You could possibly have a device pass just those messages back and forth I guess but that's definitely not the device you linked.
    - toomuchtodo 7y ago
      Sorry, I don't have any USB-C devices, and the OP at top of thread only said USB (not USB-C).
- SAI_Peregrinus 7y ago
  There are some more advanced USB-C PD proxy condoms that have their own charge controller & proxy the PD negotiation. But a lot easier & cheaper to just bring an AC charger around most places, even with an international plug adapter set.
  - rtkwe 7y ago
    Hadn't heard of those do you have a link?
gumby 7y ago
Use a USB condom that will negotiate fast charge but not passed data over the cable

klodolph 7y ago

With the data lines cut you will be limited to 100mA, no? My personal experience is that this charges far too slowly.

rtkwe 7y ago

The downside to that is you lose a lot of the newer fast charge features. USB-C power delivery specifically requires communication between the charger and the device to determine what voltage the charger will provide.

toomuchtodo 7y ago
There are "USB Condoms" (I'm fond of the PortaPow, no association just a happy user, I give them away like candy to anyone who will take one) where one end negotiates with the USB source and the other end is for your device; you still can get max power but there is no data connection. https://portablepowersupplies.co.uk/home/portapow-data-blocker-usb-adaptor https://portablepowersupplies.co.uk/home/portapow-data-block...
- rtkwe 7y ago
  That's just USB-A which only does one voltage at different current limits. USB-C has a whole negotiation back and forth about available (charger) and desired (device) voltages. You could possibly have a device pass just those messages back and forth I guess but that's definitely not the device you linked.
  - toomuchtodo 7y ago
    Sorry, I don't have any USB-C devices, and the OP at top of thread only said USB (not USB-C).
SAI_Peregrinus 7y ago
There are some more advanced USB-C PD proxy condoms that have their own charge controller & proxy the PD negotiation. But a lot easier & cheaper to just bring an AC charger around most places, even with an international plug adapter set.
- rtkwe 7y ago
  Hadn't heard of those do you have a link?

gumby 7y ago

Use a USB condom that will negotiate fast charge but not passed data over the cable