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19Firefly turns off the lights, files Chapter 7

Sad news for those of you waiting for a next-gen lead acid battery. It isn't coming. At least not from Firefly Energy. Originally spun off from Caterpillar, the Illinois company had developed a carbon graphite foam lead-acid battery that was supposed to have a bright future in the military and trucking industry. Instead, the company has just filed for Chapter 7 bankruptcy.

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