FBI cautions against public phone charging stations due to security risks.

Cybercriminals are using USB cables at public charging stations to hack into phones while they're charging, a practice known as "juice jacking." Building fake charging stations is easy, and they can be used to install malware or steal data from mobile devices. To avoid getting juice jacked, carry a portable battery charger, use a data blocker, use a plug-in wall socket, or completely power off your device before plugging it into a public charging station.