I have 5 m18 batteries, I tested and understand - it not the case.
I assume issue with tool.
I found some notes from users that it could be possible issue with "motherboard" weak electric contact. But not possible to check because it covered with strong compound. I would say - no repair possible in this case. But not sure if that is the case.
Warranty topic is a bit difficult to go. Tool is quite far away from US. Cost for delivery to pickup point and back could eat any profit.
So that's why I asking if anyone has same problem.
p.s cold weather is it's not a strong minus. It's just below normal room temperature.