FBI issues warning over public phone chargers — here’s why you should avoid them

A person charging their phone at a public charging station
(Image credit: Shutterstock)

If you’ve used a free, public charging station, you may want to think twice before doing so again. This is because the FBI has issued a new warning on the dangers of “juice jacking."

Even with one of the best phones, keeping your battery fully charged can be difficult, especially when traveling. For this reason, public phone chargers have begun popping up in airports, hotels, malls and other places in recent years.

However, in a new tweet spotted by CNBC, the FBI’s Denver office is warning smartphone users to avoid public charging stations even though many of them are free. The reason behind this is simple though as hackers can use their USB ports to infect your smartphone with malware or spyware.

While this may be your first time hearing of the dangers of “juice jacking” it isn’t a new threat. In fact, The Los Angeles District Attorney issued a similar warning about a USB Charger Scam back in 2019. The idea of using malicious USB wall chargers to deploy malware is much older and was first shown off in a demo at the Black Hat cybersecurity conference back in 2013. However, security expert Brian Krebs actually coined the term juice jacking in 2011.

How to stay safe from juice jacking

An Android phone on charge

(Image credit: Tom's Guide)

When it comes to staying safe from juice jacking, you always want to use your own charging cable and wall wort when out in public. It may be a bit of a hassle to carry around but this sure beats getting a malware infection or having your identity stolen. Likewise, using one of the best portable chargers is another way to prevent your smartphone from dying throughout the day or while on vacation.  

There are also several ways to make your phone’s battery last longer so that you don’t have to plug it into a wall outlet. On Android for instance, you can enable Battery Saver Mode and if you own a Pixel phone like the Pixel 6A or Pixel 7, you can turn on Extreme Battery Saver to extend your device’s battery life even further. Using one of the best iPhones instead? Here are 12 tips to save battery life on your iPhone

If you're shopping for a new phone though, it may be worth taking a look at our best phone battery life page. This way, you'll know which smartphones last the longest when looking for your next upgrade.

Juice jacking may be a lesser known threat and it’s still difficult for hackers to compromise the USB ports of public phone chargers without being seen but even then, it’s worth knowing about to avoid falling victim yourself.

More from Tom's Guide

TOPICS
Anthony Spadafora
Managing Editor Security and Home Office

Anthony Spadafora is the managing editor for security and home office furniture at Tom’s Guide where he covers everything from data breaches to password managers and the best way to cover your whole home or business with Wi-Fi. He also reviews standing desks, office chairs and other home office accessories with a penchant for building desk setups. Before joining the team, Anthony wrote for ITProPortal while living in Korea and later for TechRadar Pro after moving back to the US. Based in Houston, Texas, when he’s not writing Anthony can be found tinkering with PCs and game consoles, managing cables and upgrading his smart home. 

Read more
An FBI agent typing on a computer
FBI issues warning to millions of Americans to avoid these websites that can steal your passwords and banking info
A hacker typing on a computer
FBI issues serious warning to iPhone and Android users — stop doing this ASAP
A hacker typing quickly on a keyboard
Hackers are posing as Apple and Google to infect Macs with malware — don’t fall for these fake browser updates
MacBook Pro 2023
New Mac attack is tricking users into thinking their computer is locked — how to stay safe
iPhone 15 Pro Max shown in hand
iMessage under attack from scammers sending phishing messages — don’t fall for it
Green skull on smartphone screen.
Malicious Android apps with 60 million installs bombarding phones with ads and phishing attacks — how to stay safe
Latest in Online Security
23andME box
23andMe has declared bankruptcy — here's how to delete your data now
A magnifying glass on top of the Steam logo in a web browser
Valve just pulled a malicious game demo spreading info-stealing malware from Steam
A man filing his taxes electronically on a laptop
AI-powered tax scams are here - how to stay safe from deepfakes, phishing and more this tax season
MacBook Pro 2023
New Mac attack is tricking users into thinking their computer is locked — how to stay safe
Hacker using a stolen social security card
Your Social Security number is a literal gold mine for scammers and identity thieves — here’s how to keep it safe
An open lock depicting a data breach
Half a million teachers hit in major data breach with SSNs, financial data and more exposed — what to do now
Latest in News
NYTimes Connections
NYT Connections today hints and answers — Tuesday, March 25 (#653)
A first look at Amazon's Fallout TV series coming to Prime Video
‘Fallout’ season 3 plans are reportedly being made — while season 2 is still filming
Surface Laptop 7 from the front
Amazon just gave Surface Laptop 7 a 'frequently returned' label — here's what's going on
New emojis with iOS 18.4 beta release.
iOS 18.4 beta brings 8 new emoji to your iPhone — here's all the new options
23andME box
23andMe has declared bankruptcy — here's how to delete your data now
half-life alyx
Latest Half-Life 3 rumors point to a 2025 release — and maybe pigs will fly
  • McDork
    Use a USB condom to protect yourself from public chargers. It lets the power lines thru while blocking the data lines in the USB cable.
    Reply