So I thought I would share the issue that I encountered with my ProTAC 2AAA model last night. I went to the annual light up night holiday festivities here in the Burgh last night. I saw a co-worker whom was working the event and he dropped his keys so I pulled out my light to help him look and it wouldn't turn on. I checked all the connections made sure it was tightly screwed down and still no go. I then tucked it in my waist band to warm up and after ~5 minutes it worked fine. It had new Energizer batteries in it and it wasn't even that cold only around 40 out. Just thought I would share my experience with it.