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Nitecore D2
Nitecore D2 Digicharger is a universal smart charger compatible with almost all cylindrical rechargeable batteries. D2 comes with two independent microcomputer-controlled charging channels and is capable of monitoring and charging up to two batteries simultaneously.
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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.