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A comment on Toyota Is Recycling Old EV Batteries to Help Power Mazda's Production Line. Parent comment
Search this page for "PTC": https://www.electricbike.com/inside-18650-cell/
The PTC protects the rest of the battery if a single cell internally fails short.
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Search this page for "PTC": https://www.electricbike.com/inside-18650-cell/
The PTC protects the rest of the battery if a single cell internally fails short.