Li-ion batteries don't like to be charge under 0 Celsius / 32 Fahrenheit degree. If you do charge those batteries under those temperature. Like riding in the cold, the batteries are going to be charged. The cathode in the batteries will start electroplating, and eventually start a fire.
Usually devices that use Li-ion batteries by design, have this in mind. They don't charge batteries under these cold conditions.
I don't remember our bikes come equiped with Li-ion battery as stock. I won't gamble on that our bikes have these circutries in our bike, to protect us from fire, when replaced with Li-ion battery.