There have been plenty of times I’ve been stuck with a low charge on my smart phone or tablet, especially when I’m traveling, and have used one of those public charging ports to juice my device up again. Well, you might want to skip those because from what we’ve learned in this new CNN report, they’re a simple way for hackers to access your data. Yikes!

Related: A new portable charger that backs up your data too

As you probably already know, the cords you use to charge your devices also transfer information as well, so when you think you’re just filling up your battery, you could be giving hackers all your personal data. Sound iffy? Watch the CNN video where they actually tried it themselves.

If you do need to charge on the go, the safest way is to use a portable battery charger to ensure your data stays exactly where you want it, and invest in a battery charging case so you can go a little longer without having to plug in.

For more battery charger recommendations, check out these 5 best portable battery chargers for travel