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Nitecore NL2142LTP
Made to perform in freezing temperatures, Nitecore NL2142LTP 21700 battery more than doubles the typical 21700 battery discharge efficiency at -40F, which makes it a great power source for low temperature applications.
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Understand it first
Off-grid networking: comms when the towers are gone
Mesh radios, LoRa, and ham data — how small groups stay connected with zero infrastructure.
The first 72 hours without power
The order things break in, what the food in your fridge is actually doing, and what $50, $200, and $500 each buy.
The 72-hour kit, item by item
The baseline list with the reasoning attached, what it honestly weighs, and what $150, $250, and $500 each cover.
Comms when the grid is down
What each radio service legally is, what the batteries actually do, and the household plan that makes any of it useful.
Staying put: the first month
Bug-in is not bug-out. The water arithmetic, the pantry, the power, and the paperwork for keeping a household at home for about a month.