Strange Kaidomain U2 Drop-in

Today i received the U2 drop-in from Kaidomain.

http://kaidomain.com/ProductDetails.aspx?ProductId=11254

I put it in a 504b body and i try it. It don't seems to be muche brighter than my other XML drop in drived at 1.5 A so i take my DMM and i measure. Result: 1,6 A on High (battery at 4.0v). It is supposed to be at least 2,5 A

From Foy review i read 2.7A so something goes wrong. I noticed also a flickering on LOW. I open it and i discover that the emitter is different from the one Foy received (White not black).

Now, who is the guilty: DMM, Battery, Circuit bord, emitter??

I asked Foy some picture of the back of the drop-in to see if the circuit board is the same. Let's see if i discover what happen.

Hi,

I have the same blue 18650 (only one - was part of an order) and I measure on the XM-L LED T6 of Kaidoamin 2,67A (battery 4,12V).

The battery shouldn't be the bad thing of your measurement.

Maybe it's not the DMM, but the testleads - have you ever measure more than 2A with them?

My original testleads of my DMM were also bad - I measure only 1,7A on the manafont XM-L Kaidomain drop-In (with an 4,19V Samsung 18650). I build a new cable (take two bananaplugs and and old cable of my carhifi (2x 4mm²) - now I measure 2,98A with a full 18650.

Batteries would be my guess at this time ... THe BRC is notorious for low current ... The blue one ?

Here's some pictures of mine . . .

As I took these I remembered the issues I had when I first got this drop-in. It has been in my EDC L2P almost the entire time I've had it but if I screw the reflector down all the way the flashlight will not power up at all. I unscrewed it and it has been a gem of a light. If anybody is by me when I turn it on at work, I get questions.

Tail cap draw in grey Solarforce L2P

AW IC 2900 - 2.70/1.16/.11 (high/medium/low)

Solarforce 2400 - 2.80/1.20/.11

TrustFire flame 2400 - 2.70/1.16/.11

Panasonic unprotected - 2.80/1.20/.12

hopethishelpsFoy

The testleads are the original one from Fluke but i think i never measure more than 2 A on a flashlight. Anyone buy new quality cable? Where?

Maybe you're right. I ordered two "flames" from DX. Now i have only to wait 1 month...

Thanks again Foy. The emitter has a different plate (white instead of black) but i hope is the right one. My circuit board has SG PCB write on it but again i hope it make no difference in output.

Seems that your DMM only reads up to 2000mA, maybe time for a upgrade :)

I tried with another DMM.. Same result. The fluke was protected (a fuse will break if the reading is over 2A) that's why i think that the problem are batteries or testleads.

Top up the batteries and try with new leads, if you have another DMM you could also try and measure how much the voltage drops.

Thats a nice bright dropin but the LED fell right off the board on one of mine.

Test it with another cable (maybe a friend has a multimeter and you can use his testleads).

If not: Use a thicker cable (I use one of my carhifi components).

Ok. Drop-in is dead... After half an hour of use outside go off and doesn't turn on. Probably was faulty. Now i understand the flickering and the low amperage. I sent an RMA request to KD. Cross the fingers...