I am building a device for analyzing batteries, LEDs, drivers, flashlights. As planned it would have:
2 × 30 amp hall effect current sensors (< 2 milliohm burden resistance)
2 x type K thermocouples (good to 1000 degrees C!)
Battery and LED voltage monitoring (up to say 50 volts)
LVC cutoff FET for the battery
Light sensor input (digital and analog sensors supported, 50K-100K lux, integrating sphere supported)
RS232 link to computer / monitoring, graphing, logging software
It should be able to measure/calculate just about anything you would want to know about your batteries, drivers, LEDs, flashlights, etc
Projected cost would be in the $100 range.
Now, how many people out there will actually buy one? Serious people only, please… tire kickers, cheapskate weenies, skid row bums, etc need not answer.