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It would be effectively impossible to control the manufacture of these batteries. You can make batteries in "R&D quantities" for about $50,000. Alibaba will sell you a full, turnkey "pouch cell assembly line" for about $10,000. More reputable vendors want as little as $15,000.

A pouch cell is composed of layers of "cathode and anode foils between a polymer separator that is folded many times."

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