BX2 keeps turning on

[Underwater Tourist]

I use dive rite's BX2s as my back up lights for cave diving, and after the recent trip, I noticed one of them would turn on by itself
Once turned on, the light produces a very very faint light output (much fainter than any of the normal operational modes)

BX2 is a twist-on light, so I tried twisting it off, and I would twist it to the point that I could see the edge of one of the o-rings, but the light still wouldn't turn off
Anyone knows what might be keeping it on? My only guess is that the spring in the battery compartment is too strong?

 

[grantctobin]

Does it happen with different 18650? I’m partially convinced the stock battery isn’t the best choice. One of mine is fine relative to internal light housing diameter, one is not.

 

[Underwater Tourist]

I didn't try it with other 18650 because I only noticed the issue in the last two days of diving

But diameter wise, my batteries fit snug (in a good way) so I don't think thats the issue

The turning on problem doesnt happen on the surface, so I suspect its more about the length of the battery rather than its diameter

I know XTAR 18650 are shorter than the ones supplied with BX2, so I will definitely try them on the next trip