Beware of public charging points for smartphones!

The Los Angeles County District Attorney’s Office is warning travelers about a USB charger scam, or “juice jacking.”
“A free charge could end up draining your bank account,” Luke Sisak, a deputy district attorney, said in a video posted online.
Juice jacking happens when unsuspecting users plug their electronic devices into USB ports or use USB cables that have been loaded with malware.

What can we do to avoid it? The easiest thing is to connect to the socket with an electrical plug and not with a USB; the second is to have a spare battery; the third, is to buy what in jargon is called the USB condom, a stick into which to insert our USB so that the current passes but the data does not.