I know what battery I wish to use (3.7 V 140 mAh which I can swap for larger mAh battery)
I know what length of wire (3.5 inches or 7 inches depending on which ever would work better)
I know what temperature (110 F)
I know the the wire only needs to stay on for 10 seconds at a time
I don't know which diameter/gauge wire to use
I stuck at math and can't seem to google-fu my way into finding something that will give me the ability to calculate what nichrome wire to use. There was one site that would give let input the given parameters, but the lowest known temperature I could use was 400 F.
I need the math that let me calculate which diameter/gauge and with what resistance will give me 110 F temperature over either 3.5 or 7 inch wire using a 3.7V battery.
Please forgive any of my blaring misunderstandings or ignorances/deficiencies in formality of how to inquire this information.