I purchased a Li-Ion battery powered lawnmower. I'm not entirely sure what the actual exact battery chemistry is, but I believe it is not lithium iron phosphate due to its voltage typical of non-LiFePO4 batteries.
I was advised by a relative that I shouldn't store the batteries of the lawnmower in cold storage during the winter. The temperatures can easily get below -20 degrees Celsius here during the winter.
However, when thinking about this again, electric cars use lithium ion batteries too, and they can be used in very cold temperatures. Not only stored, but also actually used (for example, you can charge your electric car at any temperature). However, electric cars sometimes use a slightly different battery chemistry, like lithium nickel cobalt aluminium (NCA) oxide for Tesla.
Is it in general possible to store a lithium ion battery with unknown exact chemistry in very cold temperatures, if the charging and use happens at near room temperatures? For practicality, I was planning to store them fully charged (minus whatever minor self-discharge they may have), and at most less than a year at a time, as the next summer I again require the lawnmower.