The power bank made the everyday-carry pantheon years ago — keys, wallet, cables, brick. Then 2026 happened, and the humble brick became the most legislated item in your bag. There are new rules about how many you can bring on a plane, where they're allowed to sit, and whether you can plug into them at all. Time to update the loadout.
The new rulebook
Start with the international layer. ICAO rules that took effect March 27, 2026 cap passengers at two power banks in the cabin, ban in-flight charging from them, and — this one surprises people — forbid putting them in overhead bins. The reasoning is blunt: when a lithium cell starts cooking, the crew needs to see it now, not excavate for it over row 34.
American carriers stacked their own layer on top. Since May 1, 2026, American and Delta allow two portable chargers max, each 100 watt-hours or under, out of the bins, never recharged mid-flight, always visible and within reach. Every airline tweaks the details differently, so checking your specific carrier is officially part of packing now.
Why the crackdown? The incident logs. Battery fires on planes kept climbing through 2024 and 2025 — the FAA counted 38 U.S. incidents by June 2025 alone.
Know your watt-hours
Three numbers sort every battery at the gate. Under 100Wh: walk on, no questions. 101-160Wh: airline approval required. Over 160Wh: banned, no exceptions. And whatever the size — cabin only. Power banks never, ever go in checked bags.
Trouble is, your bank probably advertises mAh, not Wh. The conversion: mAh × 3.7 ÷ 1000. So a 10,000mAh bank is ~37Wh, easy. A 20,000mAh unit lands near 74Wh, still fine. That 27,000mAh monster? Right at the 100Wh line. And the 40,000mAh campers' bricks live in approval-or-confiscation country.
Rebuilding the kit
What the travel guides and filmmaker forums have converged on:
Fewer, better banks. The two-unit cap retires the three-cheap-bricks strategy. One quality 20,000mAh bank handles a long-haul day and clears every threshold.
Buy labeled. A printed Wh rating on the casing ends gate debates before they start. Mystery batteries with worn-off labels are confiscation bait.
Board full. Since topping up from the brick is banned in the air internationally, the pre-flight charge ritual matters again — phone, earbuds, bank itself, all full at the gate.
Repack. The bank migrates out of the roller bag headed for the bin and into the underseat personal item. Permanently. Might as well make it a pocket you can reach mid-flight, since that's the actual requirement.
Heavy carriers — film crews, drone folks, anyone flying serious cells — get the hardest homework: that 101-160Wh approval belongs to the airline and gets requested before travel, not argued about at boarding.
The bottom line
Honestly? The new normal is fine once it's habit. Two good banks, ratings printed, cabin only, charged before boarding, kept where you can grab them. The brick keeps its spot in the carry. The rules just picked which brick.
Image: Towfiqu barbhuiya, via Pexels
