Polish President Pushes Into Top Court Ringed by Riot Police

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The Ready Brief #240

Practical preparedness for uncertain times

A portable power station left on a shelf loses charge slowly, and a battery stored full and warm ages faster than one stored partly charged. Battery University's tables show a lithium-ion cell keeping about 96% of its capacity after a year at 77 F (25 C) when stored at 40% charge, against about 80% when stored full. Today's issue covers solar and backup battery maintenance. The lead story is the standoff over Poland's Constitutional Tribunal, and on the radar is a CPSC warning about 51,825 smoke and carbon monoxide alarms that fail to sound.

Solar Battery Maintenance

Portable power stations, solar battery banks and home battery systems all age, and how you store and use them decides how much capacity is left when an outage hits.

Most modern units use lithium-ion or lithium iron phosphate (LiFePO4) cells. The rules below come from Battery University and EcoFlow's own DELTA 2 manual. Your model's manual comes first.

Storage charge level matters most. Battery University says lithium-ion should be stored at about 40% charge, and its tables show why: after a year at 77 F (25 C), a cell stored at 40% keeps about 96% of its capacity, while one stored at 100% keeps about 80%. EcoFlow's DELTA 2 manual gives its own routine: the long-term storage steps end with discharging the unit to 60%, and the unit should be discharged and recharged every three months.

Heat does the most damage. In Battery University's tables, a cell stored at 40% charge keeps about 85% of its capacity after a year at 104 F (40 C), against about 96% at 77 F. At 100% charge the same heat leaves about 65%. EcoFlow's manual says to store the unit at 68 to 86 F (20 to 30 C) and to avoid storing it below 14 F (-10 C) or above 113 F (45 C) for long periods. The DELTA 2 Smart Extra Battery manual lists a charging range of 32 to 113 F, so bring a cold unit indoors before you charge it. A garage that swings past those limits is a poor place for a power station.

Shallow cycles last longer. Battery University estimates that a LiFePO4 cell lasts about 600 cycles to 70% capacity when fully discharged each time, about 1,500 cycles at 60% depth of discharge and about 3,000 cycles at 40%. It also says that sitting at a full charge for long stretches can be harder on a battery than cycling it, and that lithium-ion has no memory effect, so there is no reason to run a unit flat on purpose. Charge to full when you need the capacity, and use only part of it when you are just testing.

For portable power stations, inspect ports and cables each quarter. Dust, debris and corrosion can cause intermittent failures, so clean the ports with compressed air, check cables for fraying and connect a solar panel to confirm that charge is flowing.

Home battery systems such as the Tesla Powerwall or Enphase IQ handle most upkeep through their battery management systems. Your job is monitoring: check the app each quarter for fault codes, falling capacity and firmware notices. If capacity is dropping faster than your warranty allows, contact the installer.

Flooded lead-acid batteries, still used in some solar setups, need hands-on care. Follow the manufacturer's schedule for checking electrolyte levels, top off only with distilled water and keep the terminals clean. Equalization charging, if your charger supports it, also follows the manufacturer's schedule.

Solar panels need little. Wipe off dust, pollen and bird droppings with a damp cloth every few months, check mounting hardware and cable connections once a year, and replace cracked panels, since moisture can get inside.

A backup system helps only if it is charged and healthy when the grid goes down. Plan on a few minutes per unit each quarter.

Sources: Battery University BU-702, BU-808, EcoFlow DELTA 2 Smart Extra Battery manual

Check your portable power station’s charge level.

Find every battery bank and power station you own, turn each one on and read the charge level. If one is near empty, charge it. If one has sat at 100% for months, use it down toward the 40% to 60% storage range that Battery University and EcoFlow's manual point to. Write the date and level on a sticky note, set a quarterly reminder, and press the test button on every smoke and CO alarm while you are at it.

CPSC Warns: Stop Using 51,825 Smoke and CO Alarms That Fail to Sound

The Consumer Product Safety Commission said Oct. 29 that about 51,825 smoke and carbon monoxide alarms, model JZA-540COM, fail to alarm in the presence of hazardous smoke and fire. CPSC has seven reports of failures. The alarms were sold under the JuzhiAnn, Yfwsrecinoe and JAEHSKA brands on Amazon.com and eBay.com from November 2023 to October 2026 for $11 to $107. The seller, Shenzhen Laijinhe Trading, has not responded to CPSC's request for a recall, so no recall or refund exists. CPSC says to stop using them and replace them with alarms that meet the UL 2034 and UL 217 standards. Check the brand and model on your alarms. First reading. Next check: whether Amazon and eBay pull the listings.

Source: U.S. Consumer Product Safety Commission

Michael Boxwell's Solar Electricity Handbook, 2023 Edition is a 247-page guide, now in its fifteenth edition, that assumes no previous knowledge and covers how solar systems work, their drawbacks, and how to design and install one. It costs $19.99 in paperback on Amazon, and the publisher says an accompanying website offers online solar calculators.

Our takeaway, not a claim from the book: once you know what the panels, charge controller and battery each do, a quarterly checklist is easy to write and easy to follow.

Polish President Pushes Into Constitutional Tribunal as Riot Police Ring the Court

On Friday evening, Oct. 30, judge Anna Korwin-Piotrowska said she had suspended the Constitutional Tribunal's president, Bogdan Święczkowski, and taken over as acting head. Riot police surrounded the Warsaw building. President Karol Nawrocki turned his plane back from a state visit to Senegal, and at about 1 a.m. Saturday video showed him pushing past people at the entrance, including Korwin-Piotrowska. A presidential aide says the judges breached his inviolability; Justice Minister Waldemar Żurek called the president's conduct shameful. Nawrocki described a “forceful takeover of a constitutional body” and called talks with parliamentary groups. The dispute turns on legitimacy: he has refused to swear in five of the eight judges parliament chose this year, and the government does not recognise Święczkowski as chief justice. If you travel to or have family in Poland, check your government's travel advisory.

Source: Notes from Poland, Anadolu Agency

EcoFlow DELTA 3 Series Smart Extra Battery (1,024Wh)

Amazon lists the expansion battery at $389.00, in stock and sold by EcoFlow Inc. It works with the DELTA 2, DELTA 3, DELTA 3 Plus and DELTA 3 1500, but not the DELTA 3 Classic, which has no expansion port.

EcoFlow says the LiFePO4 cells are rated for 3,000+ cycles, or 10 years of daily use before they reach 80% of original capacity. Extra capacity does not replace the storage care above.

Budget alternative: If your power station accepts 12V car input (check your manual), charging from a running car parked outdoors is a slow fallback during an outage. Never run a car in a closed garage.

Overrated: Buying the biggest power station available. A large unit left at 100% in a hot garage can lose capacity faster than a smaller unit stored partly charged in a cool closet.

Underrated: A simple battery charge log. A sticky note on your power station that reads “Last checked: Nov. 1, charge 60%” takes almost no effort and prevents the “I thought it was charged” surprise.

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How was today's issue? Tap one below. If you pick “Could be better,” tell us what to fix.

PS: Battery maintenance is dull, which is how backup power ends up dead when an outage starts. A quarterly reminder and a sticky note fix that.

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.