I have some intelligent dragons that can discharge electricity.(Lets assume they can somehow release this electricity through contact with an object/animal when outside the water, as air is of course not a suitable conductor.) My question is: Being that they they have this readily handy energy, what kind of technology could they develop that exclusively uses their discharge as the main power source? (Or if not a power source, a main component in achieving a desired effect. We can hand wave and make it so they can produce a steady current, and realism for necessary power output isn't hugely concerning to me, as long as it isn't extremely outlandish, especially considering they are social and therefore could utilize several dragons at once to achieve something, much in the way electric eels utilize social predation.) Some things I was immediately curious about were induction heating, chemical reactions, and inverse piezoelectricity via this answer to another of my questions on this site.
Edit: Here is some additional info that may be useful. These creatures typically live in areas with access to the sea. (Islands, costal, tropics, or even other areas with large bodies of fresh water.)They are big on ocean travel, so ship and water related technology would be heavily utilized. (They are capable of sensing electrical fields while in the water, similar to how electric eels hunt.) They would be highly motivated to harvest metals for their conductive properties, I would imagine, so mining would also be important. As for how advanced they are, I would like them to be around renaissance level technology maybe a little further. (though the change in available electricity will change progress, so things being invented sooner is fine too.) most things are still made by hand (or, claw?) but new technologies make the work for these individuals more efficient. However, because they would have access to electricity before fire, I would think they'd be more likely to make discoveries about electrical properties, meaning the progress on that front would be accelerated.