I extracted this piezo igniter from a gas kitchen lighter and tested it: 1.It can shock quite badly 2.It arcs.
Questions:
1.What voltage does it produce?
2.Can I use it to charge a 1kV capacitor?
3.Can I use it as a shocker prank?
I managed to get shocked when I accidentally put my finger in the arc and the arc arced to me, it doesn’t hurt that much but it is certainly unpleasant.
The high voltage may break down the dielectric in a 1000v capacitor.
If you had a capacitor with sufficient voltage rating, there would be so little energy from the piezo device that the capacitor would not charge to much voltage.