There's alway the "Fire Piston"
Among preindustrial fire-starting methods, it's hard to beat the portable convenience of fire pistons, used in Southeast Asia since prehistoric times.
Almost all gases heat up when compressed. The harder and the faster the compression, the hotter the gas gets, hot enough even to ignite cotton wool or other flammable materials. Diesel engines work the same way: They have no spark plugs; instead the fuel/air mixture is ignited by compression as the cylinder closes up.
A beautifully made wood-and-metal fire piston (from $65; wildersol.com) designed for lighting campfires or other survivalist needs
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