Optical output power stability analyses of lasers

This thread is for me to post output power stability analyses of lasers in.
The charts are made by using a charting DMM, and firing the laser at a photovoltaic cell connected to that meter either for a predetermined amount of time or until the laser's power supply (typically, but not always batteries) has pooped out.

Let's start off with these:

WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER
(LOW POWER MODE)



Minimum intensity; five minutes.
Readings taken every six seconds.



Minimum intensity; 279 minutes (4:39) until extinction.
Readings taken every six seconds.
This also serves as a battery discharge analysis. The stock battery is (I believe) 1,400mAh in capacity.

STABILITY ANALYSES OF THE WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER.
(LOW POWER MODE)



Minimum intensity; 224 minutes (3:42) until extinction.
Readings taken every five minutes.
I'm honestly not certain why the battery life is so different than it is in the analysis in my previous post -- environmental conditions were virtually identical, and the charger was displaying a green light (indicative of "charge cycle complete") both times.




Minimum intensity; 205 minutes (3:25) until extinction.
Readings taken every five minutes.

STABILITY ANALYSES OF THE WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER.
(LOW POWER MODE)




Another minimum intensity analysis using a different 18650 cell (2,400mAh); 265 minutes (4:25) until extinction.
Readings taken every five minutes.
Note that there is no partial recovery following the rather rapid drop-off right at the beginning; this time it falls and then achieves a stable threshold without additional fanfare.




Another minimum intensity analysis using the same 18650 cell as above; 255 minutes (4:15) until extinction.
Readings taken every five minutes.
I bumped something I shouldn't have and queered the test approx. 90 minutes in, so I charged the battery and re-ran it with identical parameters.
After 3:15 into the new test, I noticed that ambient light spoiled it, so I charged the battery again and ran it for a third time. Third time's a charm, right?

STABILITY ANALYSIS OF THE WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER.
(HIGH POWER MODE)



Maximum intensity; forty six minutes until it extinguishes.
This is using the orange 18650 cell furnished with the product. The battery registered as "fully charged" (the yellow-green LED was illuminated) in two identical chargers.
Readings taken every sixty seconds (1 minute).

STABILITY ANALYSIS OF THE WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER.
(HIGH POWER MODE)



This is using using a different 18650 cell (2,200mAh).
Maximum intensity; eighty one minutes.
Readings taken every sixty seconds (1 minute).
Arctic's case temp. 101°F (38.33°C) after ~45 minutes at maximum output.
Arctic's case temp. 104°F (40°C) after ~75 minutes at maximum output.

Long-term stability analysis of the Wicked Lasers Spyder 3 Arctic 445nm 1W Blue Diode Laser


This is using using a different 18650 cell (2,400mAh).
Maximum intensity; forty five minutes.
Readings taken every sixty seconds (1 minute).

I'm uncertain why this test ran for only 45 minutes despite the higher capacity 18650 cell being used. Environmental conditions were virtually identical, and the cell registered as fully charged on two different chargers.

LONG-TERM STABILITY ANALYSIS OF THE WICKED LASERS SPYDER 3 ARCTIC 445NM 1W BLUE DIODE LASER.
(HIGH POWER MODE)



Blue 2,400mAh cell.
Maximum intensity; forty seven minutes.
Readings taken every sixty seconds (1 minute).