I've owned a Nitecore SRT7 for a couple of days now. I use it with two Tenergy 3.0v Li-ion RCR123. Most of the modes work as expected, but I am having the following problem:
When the light is clicked on, going clockwise on the ring selector through the modes, all is well until Turbo / Max. When trying to go back (counter clockwise), the light turns off. Nothing short of an off-then-on click of the rear button can make it produce light again. None of the modes work without this reset. Sometimes the light also turns off the same way somewhere between 90% brightness on the continuous white mode and Turbo.
At first I thought the light was defective. However, since the batteries were not freshly charged, I ran them down a bit and charged them. With the fresh set, the light worked fine going forward and back through all modes. A few times. Then the same issue appeared. The light has not spent even half a minute in Turbo in total. This is super annoying because I was hoping to keep it on in standby mode and just select modes as the situation requires, but with this unpredictable off, I can't do it. It also prevents me from selecting strobe without using the rear clicky. BTW, the red standby / battery charge indicator does not blink with my RCR123s except in standby mode, so it did not give me any low battery indication. I have no way to check the actual voltage of my batteries, but they do work just fine in my Sunwayman and Fenix lights. If the SRT7 is unable to support Turbo on my batteries, I would expect a slightly more civilized behavior, perhaps lower output, blinking, or anything but a hard reset.
Is this normal or is my light defective?
When the light is clicked on, going clockwise on the ring selector through the modes, all is well until Turbo / Max. When trying to go back (counter clockwise), the light turns off. Nothing short of an off-then-on click of the rear button can make it produce light again. None of the modes work without this reset. Sometimes the light also turns off the same way somewhere between 90% brightness on the continuous white mode and Turbo.
At first I thought the light was defective. However, since the batteries were not freshly charged, I ran them down a bit and charged them. With the fresh set, the light worked fine going forward and back through all modes. A few times. Then the same issue appeared. The light has not spent even half a minute in Turbo in total. This is super annoying because I was hoping to keep it on in standby mode and just select modes as the situation requires, but with this unpredictable off, I can't do it. It also prevents me from selecting strobe without using the rear clicky. BTW, the red standby / battery charge indicator does not blink with my RCR123s except in standby mode, so it did not give me any low battery indication. I have no way to check the actual voltage of my batteries, but they do work just fine in my Sunwayman and Fenix lights. If the SRT7 is unable to support Turbo on my batteries, I would expect a slightly more civilized behavior, perhaps lower output, blinking, or anything but a hard reset.
Is this normal or is my light defective?