I am having an issue with getting my flashlight working reliably. It’s a Elektro-Lumens Firesword-V and I can only get it to work sometimes.
The activating “switch” is more of a butt cap with a spring and a screw in bottom that adds tension or pushes the batteries in the tube closer to the head of the flashlight that has a screw going through the PCB.
I believe the issue is that the screw gets pushed out due to the pressure of the spring, not allowing the light to turn on. Sometimes I can get it to turn on with a quick shake, but it only works sometimes. I can get it to work if I apply pressure to the button and push down the middle screw at the same time while it’s partially disassembled).
Am I missing something? like a nut to keep the screw in place? The plastic cylinder seems to have some holding strength but definitely not enough to keep the screw flush with the pcb.
Thanks in advance for any help or tips to get this guy working
Resurrecting this thread as it was a common problem for Firesword-V:
The M3x20mm center bolt needs to have a washer under the head (as shown in one of the photos) and an M3 nut on top of the white plastic insulator/space. The first 600 units or so had (a) the washer in the wrong place and (b) the nut wasn’t tight enough. Tightening the nut with the washer under the nut would result in the M3x20mm bolt head destroying the circuit board.
So this particular flashlight was assembled correctly, just the nut wasn’t tightened enough when last assembled. The M3 nut got loose and fell out. Ergo no V+ from the batteries to the circuit board. Replace it with any M3 nut that you can find and carefully reassemble everything.
One should use a 5.5mm (or IIRC : 7/32 inch) socket for the nut and T10 for the M3x20mm bolt to gentle snug up the nut - don’t want the bolt protruding from the nut or it will damage the top 18650 button top head.
Since this circuit board was removed from the head of the flashlight, make sure to apply a good thermal paste (any CPU thermal paste will work) when re-installing to make sure the heat from the LEDs can dissipate through the aluminum head.
