I left out things that a typical battery management system will prevent, like over/under charging, or operating outside safe temperature limits. But yes, chargi

I left out things that a typical battery management system will prevent, like over/under charging, or operating outside safe temperature limits. But yes, charging a typical cell below 0 degrees Celsius will immediately and permanently damage it. Here's a ref with some details on why: https://www.bonnenbatteries.com/lithium-battery-low-temperature-use/ https://www.bonnenbatteries.com/lithium-battery-low-temperat... Li-ion chemistries that are tolerant of charging at low temperatures are a subject of active research.