I have old litium batteries just open and toss on to a burn pile. lithium burns in contact with air.
We have 6 fires that burn all winter we use a char cloth (tinder box) and a carry lantern for coals to restart ones that go out for ash removal.
We always have napalm on hand it is one of the uses for old fuel. Needed for burn piles and offal disposal.
You can use plumbers torches, click start gas lanterns. Bbq with push start lighters, roofers/tiger torch. 9 volt paperclip and paper
For those of you who want to let your inner nerd shiNE through https://www.thoughtco.com/make-chemical-fire-607502