Which batteries and power banks belong in an emergency kit?

Questions about batteries and portable power

Which battery sizes should I stock?

Check every flashlight, radio, smoke alarm and medical device you own and stock their sizes. AA and AAA cover most lights and radios; 9V is common in smoke alarms.

How long do batteries last in storage?

It depends on chemistry and brand; most packs print an expiry date. Store them in a cool, dry place, check them with a tester, and use the oldest first.

What is the difference between a power bank and a power station?

A power bank charges phones and small devices over USB. A power station holds far more energy, measured in watt-hours, and has AC outlets for laptops, fans or a fridge.

Free: printable checklists and prep spreadsheets, including a water and food calculator and a power budget. For answers with no internet: Survival LLM.