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Even 20 years ago batteries were advancing at a plodding pace. Things were just changing enough that you could build a smart phone, but battery life was by today’s standards low and charger anxiety was a real issue.

Nowadays I rarely carry a charger. On the either hand I am carrying several devices that are right on the knife edge of catching fire at any time

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I’m honestly amazed airlines have not outright banned power banks given the risks. Like the Samsung Note that had a propensity for fires, and power banks seem universally less rigorously engineered.

They carry containment bags https://youtu.be/idvBhhIt--c

I guess they'd lose customers if they banned Li batteries as almost everyone seems to carry them.

They do seem to have limits on their capacity.

I think people would just pack them into their checked luggage, where a fire could be much more dangerous.

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