One of the scarier survival events that preppers need to be concerned about is an attack involving a High-altitude ElectroMagnetic Pulse, also called HEMP.  All nuclear weapons create EMP, but when detonated high in the atmosphere, the EMP generated is so massive that it can destroy electronics and permanently knock out the power grid across the entire country.
However, unlike EMP, a CME event does not destroy electronic devices, unless they happen to be connected to the power grid or long lines that will collect the induced current.  For more on the differences between EMP and CME, you can read about it here.
This means that you should be able to easily protect your electronic gear from EMP simply by wrapping it in aluminum foil.  I also found that placing the foil-wrapped radio inside a galvanized steel trash can greatly increased the effectiveness of the shielding. If the device has a removable battery, remove it and store it separately.  The last thing you want is to find out that the batteries leaked and ruined the equipment that you went to so much trouble to protect.

I know a guy that insists that simply disconnecting a cars battery will protect the cars computer from an EMP. Because of this, many preppers are interested in EMP protection measures for their electronics.
In 1992, I was working for a defense contractor on a networking project for a military customer, and we were trying to figure out how to run CAT5 Ethernet cables through a conduit shared with electrical cables without electromagnetic interference. While more heavily shielded wires like monitor cables protected some ports on my computers, some of the USB ports plugged into longer cables got fried.

Perhaps it will help us prevent unintentional Wi-Fi attacks on the mobile phones and computers of people walking or driving past the Ars Technology Lab cyber-range. As a result, a rolling Faraday Cases computer enclosure weighs about as much by itself as a rolling suitcase.

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