Question About My G2 Making a Weird Sound

LED Flashlights – General Info CR123A Flashlights
1

I have a Surefire G2 that I upgraded with a Surefire aluminum Z44 bezel and put in a Ultra fire 3 mode (high, low, strobe) XM-L 3.7V- 4.2V and when its on the low mode it makes a low volume buzzing electric like sound. Ever hear of this before and if so why is it happening and can it be fixed. Its not killing me but I’d rather it not make the noise.

2

Ah yeah…the wonderful driver whine

3

Change the driver to Qlite like this dropin AXML2

4

Thank you for the info and link. I’m gonna buy one of those,
Thanks again and to the first poster

5

You can reduce the whine by improving the ground connection.