Thank you for the informative information. Looks like Sanwu has a great selection. And thanks for giving me some homework. (read about single/multimode diodes).
So, I have a few Wicked Lasers Spyder III lasers. The newer Arctic (it has continuously variable output and standby), the Krypton as well as the 473nm would cut off after a few seconds. I tried freshly charged batteries, different tail caps, newer batteries, to no avail. The batteries I had were...