Washington, DC (written by Nancy Trejos/USA Today) -- Hold on to your iPhone the next time you fly. 

According to a new survey, travelers in the last year left behind 8,016 mobile devices at seven of the largest airports in the country.

The airports examined by Credant Technologies, a data protection company, included: Chicago O'Hare, Denver International, San Francisco International, Charlotte Douglas, Miami International, Orlando International, and Minneapolis/St. Paul.

Only one of those airports reported handing the lost devices over to the authorities.

Wondering which devices were left behind the most? Here's the breakdown:

Laptops: 3,576 (44.6%)

Smartphones and tablets: 3,444 (43.0%)

USB drives: 996 (12.4%)

In February, Javelin Research found that 62% of Smartphone users do not have a password on their devices creating "the risk of a serious data breach," researchers said in a press release.

Other notable findings:

Five of seven airports said most mobile devices are left behind at Transportation Security Administration's (TSA) checkpoints.

Two of seven said they found most missing devices in restrooms.

Six of seven airports reported donating the mobile devices to charity or transferring them to another location.

Passengers didn't just leave behind their mobile devices. Other interesting items forgotten by their owners were tires and microwave ovens.

More than half of the lost devices were reclaimed by their owners. But hundreds more ended up in the hands of new owners.