thanks tubs

I think I’m really close to having this thing running but I’ve hit another snag that I’m not very educated on. The buzz coil. Yesterday the one I had on it just stopped. I figured the battery was dead and charged it over nite and today it still wasn’t working so I grabbed my second one. I built a little handy box with a switch and tried it out and it worked for about 5 minutes and quit. I’m using a 12 volt lawnmower battery which I’ve read mixed reviews about. Seems like it was really really hot. I’ve got one more buzz coil but I don’t want to make the same mistake again. Both of the ones that were working look like a sparkler at the business end the entire time their buzzing. Is this normal? If someone can educate me a little I’d sure appreciate it.

I’ve seen discussions where people say they’ve ran 12 volt batteries before , but I’m thinking your right, I think I’ve fried two of the 3 coils I own. So by 6 volt, what type of battery do I use? Do they sell a 6 volt battery at Napa or advance auto?