Found a new bug on the 17mm 5A 12 group driver. If I keep cycling through the modes, at some stage it won’t light up until another tap of the switch. I swapped out everything and it still happened, tried a second build and same thing happens.
I can’t replicate this with a fully charged cell, only a partially drained one.
Thanks, that’s good to know. Looks like Simon’s listing is with a 6A driver too. 950m definitely beats my current furthest thrower (FT03 XHP50.2 @ 735m).
I hope your Z1 doesn’t squeak like all 20pcs of mine. Careful dismantling to add lubricant that you don’t slice the orings. There is one at the rear of the head, make sure it’s in place and screw the head back on very slowly. Quite a few on BLF have sliced it
Just tested mine on a fresh charged 40T.
My Lux readings are always on the high side so probably reading at least 10% too high.
I have measured it at 5 m for 19600 Lx which equals 490 kCd (Approx. 1400m)
Taking into account a 10% error still makes it 440 kCd (Approx. 1326 m)
Lumens are measured with my Lumen tube calibrated against a Maukka calibration light, measured 1490 Lm at startup.
The hotspot of the 2mm is almost double the size of the 1mm2, which makes it a great thrower which has far better usability than the 1mm (that is a great laser like beam, but its got a very tiny hotspot.)
My L21A with WF 1mm2 and 5A driver measures 840 Lm and 22500 Lx which equals 562,5 kCd
The flashlight hosts are almost completed.
Next, the manufacturer will start to produce 18A drivers. Considering the matching problem, some adjustments may be needed.
Likely very similar style to the 4x18a. Though I personally wouldn’t mind a little extra aluminum be left behind in the head at the bottom of the reflector well with deeper fins and a thinner bezel that allows for a larger reflector.
please could anyone explain, how does low-voltage protection/warning on S2+ 5000mAh / S21A 6000mAh drivers work? Is it warning only - starts flashing once voltage decreases to certain level? Or does it also cut off the battery - if so, at what voltage?
Also, how does the driver work? What is the max. current on let’s say 50% load? Does it pull 2500mA continuously? Or “caches” 5000mA then 0 for a while, and so on?
I’ve pulled some ICR18650-26Ds from dead laptop battery (2 out of 9 cells dead), and would like to know, whether I can use them. They are rated at 5200mA max current, but I don’t want to push luck drawing 5A off them. At the same time - they’re not protected, thus my interest in voltage cutoff.
Someone else can chime in on your questions but I wouldn’t use the ICR chemisty, specially old cells. ICR can be dangerous without an added protection circuit.
You’d ideally want to use cells with a current rating of 10A+ for a 5-6A driver current. These flashlights require the highest possible voltage on load, when drawing a high load the voltage will drop and how far that drop is depends on the performance of the cell used. There are other factors but I’ll leave it at that. For a 5A cell I’d advise 3A max load. Get something decent. Note that old used cells have a higher risk depending on how healthy it is. If a cell gets unstable just remember you’re holding a sealed metal tube that has the potential to explode