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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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The carbon-graphite foam, lead acid batteries created by Firefly Energy are a bit closer to production now that the company today announced a MoU with lead acid battery maker NorthStar Battery Company. This agreement means Firefly's 3D batteries should be in production by the fourth quarter of this year.

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As we mentioned the other day, Firefly Energy is setting out to change the way we think of lead-acid batteries. Mil Ovan, Firefly Energy co-founder, spoke with AutoblogGreen about this new battery technology and what it might mean for PHEVs and EVs.

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Firefly Energy Inc., of Peoria, Ill has patented a new type of lead acid battery they claim would be an excellent choice for hybrid and electric vehicle use. The battery is of a lead acid design, but differs from traditional lead acid batteries by using a carbon-graphite foam grid instead of a conventional lead grid. They claim that this will reduce weight significantly, ease manufacturing concerns, allow the batteries to charge quicker and increase the available form factors of conventional lea

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