Jim:
In Part I of his article, Dr. K. mentioned some options on do-it-yourself cautery. My suggestion is to consider buying new tips [not contaminated by solder metals and rosin] and a butane soldering torch for times when no electricity is available. For example, see:
Pro-120 [1]
Tectra Tools [2]
UT-100 [3]
TS600 [4]
Regards, – Craig W.