I just recently purchased a streamlight TLR 2 with laser sight. i was just wondering why, even in the "off" position, it still feels warm even when not in use for a long time, does it emit radiation spontaneously? how long will the battery last once it's in? i saw that the run time is 2.5 hrs. but if you just keep it in there without using either the light or the laser, how long do you suppose it will last? any info is appreciated. thanks guys.