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Nitecore T4K
This is your chance to own a superlative and carry it around every day. The Nitecore T4K is the world's most compact 4000 lumen (10 second burst) keychain light.
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Understand it first
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.
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.