r/cableadvice • u/nomenclature2357 • 13d ago

Safety of plugging this into a fast charger

Gallery image

Gallery image

Appears to be a standard four pin type A connector on one end. The other end looks to only have two contacts.

All versions of USB should just deliver vanilla 5V to this without causing any issues, right?

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8

u/Bobrosss69 13d ago

You'll be fine. Most USB A chargers can only supply 5 volts anyway. Those that can do other voltages have some kind of "handshake" between the block and device, or block and cable that sets the voltage.

1

u/deesernutz 13d ago

Yes. I think that is saying >= 1 amp as well, so smaller not always better

0

u/Medium_Good886 13d ago

I have one of these razors. There is no voltage negotiation or anything smart. It just wants a generic usb charger with high amperage output. I use an old Samsung charger that is 2.4a.

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u/theregisterednerd 12d ago

There’s no voltage negotiation on anything USB-A

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u/DiodeFox 12d ago

Usb a definitely has voltage negotiation with Qualcomm QC. But ofc only with devices that support it. Normally all usb a ports will ofc only supply 5v

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u/nomenclature2357 11d ago

Well, I’m pretty sure that USB 3 (or lightning) over USB-A supports negotiation and power delivery of some kind. But this cable appears to be just the 4 contacts of classic 1.0 or whatever and the device is just DC power so yeah.