Staying connected has become an essential part of travel—and most air passengers now carry multiple devices, including phones, tablets, and laptops. But keeping them charged has become a major challenge, as airport outlets are in high demand. This is why many travelers rely on external power banks to stay powered up throughout their journey.

However, lithium-ion batteries, the technology inside these portable chargers, have recently been placed under scrutiny. In 2016, Samsung recalled its Galaxy Note7 smartphones after overheating batteries caused fires, leading to a complete ban of the devices on planes. The same type of battery powers today’s external chargers. Just this past July, Anker recalled five different power bank models , affecting over 1.1 million units. Weeks later, off

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