Canada has a lithium battery manufacturer called Volthium. Their...

Canada has a lithium battery manufacturer called Volthium. Their website says, "All our batteries include cold charge protection. Since the damage caused by charging below zero Celsius is irreversible in some cases, the battery will not charge under these conditions. In fact, all our batteries are equipped with a cold charge protection system, which prevents the battery from being charged below freezing.The solution is to heat the battery so that the internal temperature reaches 5 degrees Celsius. From that moment on, it will be able to be charged.Another solution is to opt for our self-heating batteries that can charge regardless of the temperature."

Saskatchewan low temperatures in winter can be in the minus 30s. (Take your pick, Celsius or Fahrenheit.) Not the easiest place to make batteries, but then, not the easiest place to pump brine and heat it to 90 Celsius during lithium extraction.