Battery query

Probably a thick question but I don't want to get it wrong.

I bought this 18650 with a USB C port from ZorKryth a few months ago but they've spooked me in a comment in an email:

"This is the Positive and negative same-pole lithium battery."

So what lights can I actually use this in then? I got this extra battery to use in other torches!

Thanks in advance!