If you have batteries in your house, at around 70 degrees, then take them out into an unheated garage where the temperature is near freezing, can you immediately plug them into a charger and rely on the heat generated during the charging process to keep them warm?
Maybe a better question to ask is: Is the heat generated by charging enough to keep cells above freezing, if they were warm when you started charging them?
Maybe a better question to ask is: Is the heat generated by charging enough to keep cells above freezing, if they were warm when you started charging them?