/diy/ - Do It Yourself

Hey /ohm/, got these LED strings from a friend who wanted to throw them out because the battery compartment broke, so I intended to just wire them to a new one.

But looking at them, this is just exposed copper wire running electricity through them. I have very little understanding in actual electronics - how do people not get electrocuted touching them when they're plugged in, closing a circuit with their finger by touching both wires? Is there a resistor of some kind near the batteries to lower the voltage significantly? Am I endangering myself by just connecting them to a live AA battery?