Imagine being mid-flight, your phone battery is dying, and you reach for your trusty power bank—only to realize it’s now banned. That’s the reality Japan is introducing starting mid-April, as the country moves to prohibit the inflight use of portable power banks on all domestic and international flights. But here’s where it gets controversial: Is this a necessary safety measure, or an overreaction to a rare risk? Let’s dive in.
This isn’t just a standalone decision—it’s part of a growing global trend. The move comes ahead of new international regulations expected as early as March from the International Civil Aviation Organization (ICAO), signaling a broader crackdown on inflight power bank usage. According to Japan’s Asahi Shimbun, the transport ministry will not only limit the number of power banks allowed on flights but also effectively ban their onboard use, including charging them via the plane’s AC or USB sockets.
Passengers will be restricted to carrying just two spare batteries, each rated at no more than 100Wh, in their carry-on bags. And this is the part most people miss: That 100Wh limit isn’t about the battery’s power output (measured in Watts) or its capacity (measured in milliampere-hours, or mAh). It’s a specific energy rating that covers nearly every power bank on the market—even high-capacity models like the Anker Laptop Power Bank, which boasts a 165W output and 25,000 mAh capacity, falls under this limit at 90Wh.
Power banks will remain strictly prohibited in checked luggage, so if you’re traveling with one, it’s carry-on or nothing. Across Asia, many airlines have already banned inflight use of power packs and require passengers to keep them at their seats, not in overhead lockers. But why the sudden crackdown?
The risk lies in lithium-ion batteries, which power most portable chargers. If they malfunction, they can enter a process called “thermal runaway”—a rapid energy release that triggers extreme heat, fire, or even explosions. The International Air Transport Association (IATA) reports that nearly 50% of passengers now travel with power banks, and the US Federal Aviation Administration (FAA) logged 34 lithium battery-related incidents in 2025 alone, with 11 tied directly to personal battery packs. Even more alarming? A 388% surge in lithium battery fires on US flights between 2015 and 2024.
While these incidents are rare, the potential consequences are severe. Japan’s ban aims to eliminate that risk entirely—but at what cost? Is convenience worth compromising safety, or are we overregulating a minor issue? What do you think? Let us know in the comments—is this ban a step too far, or a necessary precaution in an increasingly tech-dependent world?
