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FROM THE DESK
I counted the power banks in my house last week. I have seven. Different sizes, different brands, different charge levels. Three were dead. Two were in bags I don't use. One was in a kitchen drawer under some rubber bands. Only one was charged and accessible. Seven power banks and effectively one that worked. Quantity without system is just clutter.
Here's what I've got this weekend.
THE BRIEF
Power Banks: The Right Size, The Right Place, The Right Charge
We covered large power stations (Issues 21, 72) and solar panels (Issue 58). This week is about the smaller, more portable layer: USB power banks that keep your phone, headlamp, radio, and small devices running when you're away from a wall outlet or during short outages.
Sizing matters more than brand. Power bank capacity is measured in milliamp-hours (mAh) or watt-hours (Wh). A typical smartphone battery is 3,000 to 5,000 mAh. A 10,000 mAh power bank provides roughly 2 full phone charges (efficiency losses reduce the theoretical 2 to 3 charges). A 20,000 mAh bank provides roughly 4 to 5 charges.
For preparedness, think in terms of "device-days." How many days do you need to keep your phone alive without any other power? Multiply that by roughly 5,000 mAh per day of moderate phone use. A 3-day target needs about 15,000 to 20,000 mAh. That's one mid-size power bank.
The placement strategy: one compact bank (5,000 to 10,000 mAh) in your everyday carry or purse. One mid-size bank (20,000 mAh) in your go-bag. One in your car kit. Each serves a different scenario without requiring you to remember to grab it.
Charge discipline is the system that makes this work. Every Sunday evening, plug in every power bank. By Monday morning, they're all full. This weekly ritual takes 30 seconds of effort and ensures that no bank is ever dead when you need it. Set a recurring reminder.
Fast charging matters during short warning windows. A power bank with USB-C Power Delivery can charge from empty to 80% in about 90 minutes. When a storm warning gives you two hours' notice, fast-charging capability lets you max out your portable power quickly.
Pass-through charging (charging the bank while it charges a device) is useful during outages when you're managing power from a solar panel or car. Not all banks support it. Check before buying.
Avoid cheap, no-brand power banks. They often overstate capacity, lack safety circuits, and in rare cases pose fire risk. Anker, Nitecore, and RAVPower are reliable brands with honest capacity ratings.
ONE THING THIS WEEK
Charge every power bank you own right now.
Find them all. Plug them in. Set a weekly Sunday reminder to repeat. From now on, every bank is fully charged, every week, without thinking about it.
ON THE RADAR
The US Has Suffered a Major Power Outage Every Single Month of 2026
About 70 percent of this year's outages were triggered by severe weather and another 20 percent by equipment failing on its own, a reflection of a grid where most components date to the 1960s and 70s. March alone knocked out power to more than a million customers across the Midwest and Mid-Atlantic. June's heat wave cut power to more than 373,000 more.
A grid failing this consistently is exactly why the small, portable layer covered in this issue matters. It is not a backup for a rare disaster. It is a backup for an ordinary month.
Source: Electrek
LESSON FROM: JOEL LAMBERT
Joel Lambert's book isn't about gear at all. In A Navy SEAL's Bug-In Guide, he organizes home preparedness around what he calls "The Life Pie," ten categories a household needs to cover to shelter safely in place, from water and medical care to security and stockpiling. Redundancy runs through every category: no single system, water filter, lock, or battery, is allowed to be the only plan.
That's the same principle behind this week's power bank system. One bank is a single point of failure. Three banks in three places, charged on a schedule, is redundancy the way Lambert teaches it: boring, repeatable, and not dependent on remembering to grab any one thing.
A Navy SEAL's Bug-In Guide by Joel Lambert (about $37, paperback).
WHAT'S HAPPENING
A Nationwide Cyclospora Outbreak Tied to Taco Bell Lettuce Has Topped 6,700 Cases
The CDC's Health Alert Network reports 1,645 confirmed cyclosporiasis cases across 34 states, with more than 5,100 additional cases still pending confirmation, nearly seven times last year's case count for the same period. Nine percent of confirmed patients have been hospitalized. Investigators traced the source to shredded iceberg lettuce from Taylor Farms served at Taco Bell locations in at least five states, and both companies have pulled the product from their supply chains.
Outbreaks like this often spread for weeks before a common source gets confirmed. Checking FDA and USDA recall notices periodically, and knowing which pantry and refrigerator items came from a recalled lot, catches problems faster than waiting on the evening news.
Source: CDC Health Alert Network, NBC News
WHAT WE'RE RECOMMENDING
Nitecore NB10000 Gen 2 (10,000 mAh)
This is the power bank we carry daily. It weighs 5.3 ounces (lighter than most phones), provides about 2 full phone charges, and supports USB-C Power Delivery for fast charging in both directions. The carbon fiber construction is thin enough to fit in a back pocket.
For its size and weight, it's the best power-to-portability ratio we've found. It charges a phone from 10% to 100% in about two hours. It recharges itself from a wall outlet in about four hours.
We've used it on flights, during outages, and on day hikes. It's the one power bank we never leave home without. About $60.
Budget alternative: Anker PowerCore 10000 (about $26). Slightly heavier, slightly slower charging, but reliable and well-reviewed. Excellent for a go-bag or car kit.
OVERRATED / UNDERRATED
Overrated: Massive power banks (30,000+ mAh) for everyday carry. They weigh a pound or more and are too heavy to carry daily. A 10,000 mAh bank in your pocket beats a 30,000 mAh bank in a drawer at home every time.
Underrated: The weekly charge ritual. The most common power bank failure isn't a dead bank. It's a bank that was 23% charged when you needed it to be 100%. A 30-second weekly habit prevents this completely.
THE LINK DUMP
Tom’s Hardware: Best Portable Chargers: Independent power bank testing and reviews.
Battery University: Technical resource on lithium battery care and longevity.
Grokipedia: Power Bank: Background on power bank technology.
Nitecore.com: Product details for the NB10000 and other compact power options.
COMING UP
Teach yourself basic sewing and repair. The skill that fixes clothing, gear, tarps, and medical wounds using a needle and thread.
PS: After the power bank audit, I consolidated from seven banks to three: one pocket-sized for daily carry, one mid-size for my go-bag, one for the car. All charged every Sunday. The system is simpler and every bank is always ready. Three is more than seven when three are charged and seven aren't.
THE READY BRIEF is published for informational and educational purposes only. Nothing here is professional legal, medical, financial, or tactical advice. Preparedness looks different for every household. Use your own judgment, consult qualified professionals when the stakes are high, and adapt what you read here to your actual situation.
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