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Consumers should not buy or use individual 18650 lithium-ion battery cells due to possible fire risk, according to a warning just issued by the Consumer Product Safety Commission (CPSC). The commission says it is working with e-commerce sites like eBay to remove listings of loose 18650 cells, which are sometimes used in vapes, e-cigarettes, flashlights, and toys.

“[T]hese battery cells may have exposed metal positive and negative terminals that can short-circuit when they come into contact with metal objects, such as keys or loose change in a pocket,” the agency wrote Friday. “Once shorted, loose cells can overheat and experience thermal runaway, igniting the cell’s internal materials and forcibly expelling burning contents, resulting...

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