Just purchased a Nitecore EC2 and have been happy so far except for one issue. I'm running CR123's, as I don't have an 18650 for it yet, and noticed that my micro mode doesn't work. When I initially put the batteries in and fired it up the micro mode "pulsed", if you will, and was barely visible. All other modes seem to work just fine. Since, I've had the micro mode to activate correctly only once. Could it be the batteries or do I have a faulty light?