I'm trying to figure out the best approach of creating an electric fire starting stick that we plan to use for prescribed prairie burns in Iowa. The drip torches we currently use are fuel based, and we are trying to move away from this if possible. I need help determining how to configure a basic fire starting device using wire (Nichrome?), batteries, and a regulator to generate 500 to 600 degrees. The goal will be to drag the heating element across the base of the dry grass to ignite it in flames. What wire/heating element do you recommend for this application? Is there a way to use an 18-volt rechargeable battery from a weedwhacker to power the heating element? Or should it be powered by a 12-volt battery or something different? What additional components should I include in my circuit to regulate the temperature between 500 and 600 degrees and to ensure the wire doesn't overheat and break? Any other suggestions or recommendations you have would be greatly appreciated. The ultimate goal is to create a battery-operated heating element that can reach temperatures of at least 500 degrees and that can withstand continuous use and abuse.