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Electric toothbrushes run on rechargeable lithium-ion batteries. And lithium batteries? They’re the drama queens of the travel world. Airlines get twitchy about them because, in rare cases, they can overheat or catch fire. But here’s the thing: your toothbrush battery is tiny—usually under 5 watt-hours. Compare that to a laptop battery (50–100 watt-hours), and suddenly your toothbrush looks like a harmless little hamster.
Still, the rules vary slightly depending on where you’re flying. For example, the FAA says you can pack lithium-ion batteries in checked luggage if they’re installed in a device. That’s key: the battery must be inside the toothbrush, not loose. If you try to toss a spare battery pack in your suitcase? Hard no. That belongs in your carry-on.
But wait—what if your toothbrush has a removable battery? Like those old Oral-B models with the AA rechargeable packs? Check the fine print. Some airlines treat those as spare batteries, which means they must go in your carry-on. Yeah, I know. It’s like they want us to fail.
