Mine is a stock driver.
Surprised that the Basen”s give a higher tail cap reading than my Keeppowers although DMM accuracy will probably be different between myself & Gerrit.
FWIW I am using an Amprobe AM510 with stock leads.
Just killed the clicky switch while trying to bypass the spring… :person_facepalming:
But have already ordered a new one, including some 0.2 ohm sense resistors to mod the driver.
The switch was still mounted on the PCB while I was soldering on the spring side, suddenly I saw some black stuf flowing through the via’s.
Yes, that was the switch that was melting…. :laughing:
Funny thing is, this wasn’t the first time it happend. :person_facepalming:
Also usually no 2 lights will give exactly the same readings even if using the same cells & test equipment.
Have a look at the graphs on post 99 here PD68 Review: Thorfire S70 - XHP70 Monster
A difference in accuracy of the DMM of only 0.3% would give the Keeppowers the same tail cap reading as the Basen.
Good high capacity cells, yes. Not great cells if you are looking for max output or a high tailcap reading. Look at the sag when compared to higher drain cells like a fair amount of the 4200mAh 26650. That’s why I opted for 4200mAh Efest IMR26650 cells for near max output, but a fair compromise in capacity.
I wasn”t looking for a high tail cap reading, if I had been I would have chosen another cell.
Agreed there is some voltage sag but as the S70 only pulls 5A on turbo & as I didn”t envisage running it on turbo all the time (having to have to re-set it every 3 minutes after it stepped down) I went for the KP”s.
I was more interested in run time on the lower settings (high) TBH.
However as I have the Cometa coming which again is around 5.5A on max I think, I may order a pair of Basen”s
Also when my new light meter arrives I will be able to measure light out put with the 3 different brand pairs of 26650 cells I have
I may even get a pair of KK”s as I think that I will be getting a second Cometa if the first is as good as it sounds.
Basen at 4.18V does 4.12A tail current, Efest 4200mAh at 4.18V does 4.12A. Fresh charged Efest 4200mAh at 4.22V do 4.68A but the same output in the light box at ~3657 lumens, dropping a mere 21 lumens in 30 seconds.
Whereas many of my lights are not practical at all, just more for showing off and making people giggle, I consider this light very practical mainly because of the beam pattern and brightness and battery indicator (with my clear button :zipper_mouth_face: ). It doesn’t get too hot maxed out, but I think somewhere around 7amps would be a better balance of crazy lumens and better battery life. There are diminishing returns at the very high amp levels.
I pulled mine back down to 5A for a 4264 lumens start value and 4154 at 30 seconds, balancing the total output with the maintenance of same.
With 2 R091 resistors on board, I placed an 1ohm on the extra pad, then stacked 3 more 1ohm resistors for a total resistance value of .038494. Stock value was .0455.
I must way, the S70 is used a lot.
We have our chickens and quails under attack.
two dead quails bitten in the neck by a very thin digging predator
(probably something in this family Mustelidae - Wikipedia
last sumer in broad daylight 2 of our chickens were eaten by a fox (we know because we spotted it digging to get into the quail pen later.
So now i check the pens from the house, click clikc and BAM all is lit and I can inspect the whole yard.
Very nice, I do not even have to go outside.
I put a 0.2 Ohm on the extra pad and got 6A, it looked like a steady 6A. (using the Basen 4500mAh)
Didn’t test long and when I wanted to test it for a second time I released some magic smoke from the driver… :rage:
Here you can see the 0.2Ohm resistor in place, didn’t know it was a smaller size. (bought it from james @3tronics)
Here you can see that component that released his magic smoke, anyone has an idea what it was?
The rest of the driver seems fine. Could it be from a short at the led? I think the reflector makes contact with the wires, I had some tape on the reflector but it didn’t stay in place.