I know it's a two week old thread, but I stumbled across it while trying to figure out how this BofA safepass card thing works. I got one, for curiosity first, and security second (I know, priorities).

Anyway, the back says it contains a lithium battery, and to destroy it only by cutting along a specific marked line. If anyone is interested, it's branded as nagraID. Mine states V.1.4.1. http://www.nagraid.com/index.html

To sync it with your BofA account, you need to input the card serial number along with TWO generated codes in short succession of one another.

So anyway, that's that!