Credit stick

Credit sticks are devices presumably used to store currency in a digital format. They look like Transformer-scaled memory stick.

Fiction

Timelines

After their (mis)adventures dealing with both the law and the Waruder invasion, C-81 was content with simply walking away from it all. But Packrat wasn't, and the Maximal felt compelled to steal the credit stick of one of the officers that came to their aid that day. Cybertron's Most Wanted