Re: 445nm "sled" pics
That's the easy part...
Your just measuring 'battery current draw'. So with a fully charged battery, leave the tail cap/switch off of the laser. And then you will measure between the negative end of the battery (negative prong), and the metal host. (positive prong)
Or with a case positive build, you will measure from the battery positive, to the host...
Have your DMM positive lead plugged into the 10 Amp Plug if you have a choice, and set to measure mA's...
Of course, watch your eyes. Because obviously the laser will come on during your measurement...
It's interesting when measuring battery current draw with a Boost Driver...
As the voltage of your battery drops, the current draw gets higher and higher. Because the driver is using current to boost the voltage that the diode is asking for.
This is why I said an 18650 will be wanted. Especially if we're going to be pushing these diodes...
So make sure you test with a fully charged battery. Because the current draw will most likely be much different with even a slightly discharged battery. (unless the diode is only asking for 4 volts or so)