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Sounds like a job for USB Condom! http://int3.cc/products/usbcon...

You just need a resistor or two. Almost any USB-charged device will charge at 500 mA if it is connected to a dumb charger (no data lines), but in order to charge at a higher current (as many devices do), it needs to sense that it's connected to a charger that supports the higher current draw. So that it can be implemented without real USB-supporting electronics, that's just done with some simple electrical components. So you can make a charger that blocks the data lines but permits full-speed charging.

If you're okay with the slow version, just go out and buy a "power only" USB cable. They already exist. Alternately, this.

And what if that outlet, with the "TSA-approved Cable(tm)" is doing more than just powering on your device?

This is why USB Condoms exist (no, this is not a joke)

http://int3.cc/collections/fro...

"Have you ever plugged your phone into a strange USB port because you really needed a charge and thought: "Gee who could be stealing my data?". We all have needs and sometimes you just need to charge your phone. "Any port in a storm." as the saying goes. Well now you can be a bit safer. "USB Condoms" prevent accidental data exchange when your device is plugged in to another device with a USB cable. USB Condoms achieve this by cutting off the data pins in the USB cable and allowing only the power pins to connect through.Thus, these "USB Condoms" prevent attacks like "juice jacking".

Stay safe.

Actually, yes they do!

http://int3.cc/products/usbcon...

A few other places make similar products. Blocks the data pins and just leaves the charging pins bare.

Use a condom.

it appears to me that the image is actually of a different device, a FaceDancer21 that allows you to masquerade a USB host (e.g. a computer) as a USB device (e.g. a mass storage device).

An entire PCB filled with parts? This looks like an example of someone too smart for their own good.

The photo seems to be of this thing, which is an entirely different device which apparently 'allows a computer (or "host") to masquerade as a USB "device" to communicate with other USB devices or USB Hosts.'

In other words, exactly the kind of device you wouldn't want to unknowingly connect things to.