Here’s Why Using Public Chargers for Your Phone Can Be Risky

Recent warnings about “juice jacking” at airport charging stations have raised concerns among travelers, but experts say the actual risk is extremely low. Juice jacking occurs when a compromised USB port is used to steal data or install malware on a device while charging. Because USB ports transmit both electricity and data, a hacker with physical access could, in theory, exploit this connection.

Despite the alarming headlines, reported cases of juice jacking are virtually nonexistent. A 2019 TechCrunch report cited Los Angeles County’s top prosecutor confirming that there were no documented cases, and security researchers like Mike Grover have noted that no verified incidents have occurred in public spaces.

While juice jacking remains largely theoretical, other risks at public charging points are more plausible. Poorly maintained chargers or altered voltage can damage devices, and more common threats include unsecured public Wi-Fi, lost or unlocked phones, and using USB drives from unknown sources.

Travelers can take several practical steps to protect their devices. Always decline prompts to “trust” a connected device when charging, since charging does not require a data connection. Use your own charging cable and wall adapter plugged directly into an AC outlet whenever possible. For public USB ports, data-blocking adapters or charging-only cables can prevent unwanted data transfer. Wireless charging pads or MagSafe chargers are also safe alternatives, as they transmit power without data.

Additional precautions include keeping your device software updated to protect against malware, avoiding unknown USB drives, and using a VPN when connected to public Wi-Fi. By following these measures, travelers can minimize exposure to digital threats and safely keep their devices powered while on the go.