TK's Emisar D4 review

I have to admit I was just contemplating a line of thought very close this.

Just got my S4 2B, and it does get dangerously hot. I took the optics out just to see how it would be as a mule and the end started smoking vigorously within 5 seconds. This flashlight doesn’t seem safe?

The LEDs’ circuit board is not glued or screwed to the shelf. The optic and lens press it against the shelf when the bezel is tightened down.

Removing the optic prevents the board from properly conducting heat through the shelf and into the body of the flashlight.

I hope your light is okay… :frowning:

It’s fine now, the domes aren’t cloudy or anything. It was more surprising than anything else. I do love the light, I just wish LEDs were more efficient here on the ragged edge of emitters in hotrods. Love the UI.

ok this emisar light need a proper exposure, i didn’t even know D4 before this thread. Now there is a thrower and a D7? I haven’t even got my D4

Yeah, without pressure holding the MCPCB against its heat sink shelf, it’ll cook itself pretty quickly. That’s normal. It shouldn’t be operated at high current with the heat sink nerfed.

(this also applies to wrapping the pill to make the surface feel less hot, though that has less immediate results)

D4’s MCPCB is 2mm thick, all other MCPCBs are 1.6mm, it is highly unadvisable to use a thinner MCPCB which will create issues with thermal transfer between the head and the MCPCB as the Bezel is holding down the MCPCB by pressing down on the optic.
Neither should the flashlight be used without the bezel and optics in place, doing otherwise will overheat the LEDs.

The D4 will produce tremendous heat on turbo mode, and heat up very fast (10~20 seconds for the thermal protection to kick in depends on the cell), please make sure the bezel always be tightly enough on D4 although it’s checked very well before leaving the warehouse.

Hi Hank,
do you know when the D4 will be available at intl-outdoor ?

Hank, why did you make this MCPCB thicker?

Yes, it’s up now,
http://intl-outdoor.com/emisar-d4-high-power-led-flashlight-p-921.html

The price has been increased once again… :weary:
EDIT : ordered anyway, I’ve waited for such a compact e-switch flashlight too long… and with that FW I could not pass !

Ordered!!! Muahahahahaha!!! :smiling_imp:

Ordered.

Now the wait…

My bank has downtime, doesn’t accept card transactions now :rage:
Guys / gals, which one did you pick?

Black 219C
Grey 219C
Green 219C

Green 219C + 18350

Same. Can’t wait!

Ordered grey 219C + 18350 + tracking…… :person_facepalming:

I hope spent less….but is ordered now … :smiley:

I’m into green 219C + 18350 too. We’ll see if the stock lasts long enough for me….

Grey 219C