Hello,
I have an 80-meter nichrome wire and I want it to heat up to 40 degrees Celsius maximum (30 to 40 is ok). I want to connect it to a battery that is enough to make it hot for at least 10 hours.
The ambient's temperature is negative 15 degrees Celsius.
What is the diameter for this wire? what is the resistance?
What are the spec of that battery in this case?