Imagine being mid-flight, your phone battery is at 10%, and you reach for your trusty power bank—only to realize it’s now banned. Japan has just dropped a bombshell, announcing a ban on the inflight use of portable power banks starting mid-April, and it’s sparking conversations worldwide. But here’s where it gets controversial: Is this a necessary safety measure or an overreaction to a rare risk? Let’s dive in.
Japan’s transport ministry, as reported by Asahi Shimbun, is not only restricting the use of power banks onboard but also limiting passengers 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: even charging your power bank via the plane’s AC or USB sockets will be off-limits. Confused about that 100Wh rating? Don’t worry—it’s not the same as a battery’s power output (measured in Watts) or its capacity (measured in mAh). Essentially, this rule covers nearly every power bank on the market, even high-capacity models like the Anker Laptop Power Bank, which clocks in at 90Wh despite its hefty 25,000 mAh capacity.
Power banks will still be banned from checked luggage, so if you’re bringing one, it’s carry-on or nothing. This isn’t just Japan’s move—many Asian airlines already prohibit inflight use of power banks and require passengers to keep them at their seats, not in overhead bins. But why the crackdown? The answer lies in the risk of ‘thermal runaway,’ a terrifying process where a malfunctioning lithium-ion battery releases energy rapidly, potentially causing fire or even explosions. The FAA reported 34 lithium battery incidents in 2025 alone, with 11 tied directly to personal power banks, and a jaw-dropping 388% increase in lithium battery fires on U.S. flights between 2015 and 2024.
Here’s the kicker: Nearly 50% of passengers now travel with a power bank, according to the International Air Transport Association. So, while Japan’s ban aligns with upcoming international rules from the International Civil Aviation Organization (expected as early as March), it raises a thought-provoking question: Are we sacrificing convenience for safety, or is this a preemptive strike against a growing threat? Let us know what you think in the comments—is this ban a step too far, or a necessary precaution?
