Or another idea: on KD boards the wire soldering points are very close to the screws try measure short between the led plus and minus and the MCPCB screws with multimeter.
I have had the same thing happen before. Unless you had the short going for some time , the driver and cell both should be OK. You may have lost a little bit of life off the cell by raising the Internal resistance slightly if anything.
If you haven’t already tested it ,you can get a more controlled result if you have a short jumper wire and just hold it against the end of the tube and the negative end of the cell and then have someone hit the side switch to see if everything is working OK before you put the tailcap on the light. This way if the light does still have a short or anything you can break the connection much quicker than trying to get the tailcap back off.
I would say the battery should be OK if its not getting hot shorting too long, the weak link is the spring and switch
2 26650 Keeppower High Drain cells shorted you look likely at up to 100 amps no wonder spring and switch quit
Those batteries have IR of like 20mOhms, maybe another 30-40mOhms on wires and spring bypass
so we got like 8V on 60mOhms
if the original DTP board does not fit the size of the new you always can drill a hole in the shelf and simply twist one of those self cutting screws in it that are often used in plastic cases if you got no thread cutters
I had the rotating star also a few times, cutting in the wires, never turned out good melting some stuff
You can check the driver if the LED- pad has a very low resistance to ground ring the short created that voltage spike and blew the AMCs, but this usually happens only if the driver had the gate of the AMCs activated
How it cutted the wire? Did you use screws to secure MCPCB? It should not spin. I noticed the hole misalignment on KD stars too and I always grind the MCPCB wire cutouts bigger to fit like this:
Now that I showed my led I show the complete build. I made it yesterday. It draws 17.6A and puts out 7800 lumens. I’m still waiting for SMO reflector.
I tried to make the button light show the Hungarian flag colors (red, white, green) but in dark it only shows the red and green because I can’t put white leds in center.