I’ll have to thank Hank for sending a black-colored light for photography purposes. Those are always the easiest to get good pictures of.
Also, it’s cool white. So I’ll want to swap the emitters. And it has no O-rings, so I’ll probably transfer the rings from the dev prototype. And no label on the tailcap.
So it’s not quite a production unit, but it’s pretty close.
Awesome review TK, it seems every time I decide to slow down on buying lights along comes one like this D4S that just can’t be ignored,
This light is spectacular and your pictures really confirm that,
I can see where the pricedrop comes from. The other two I’ve gotten was cleaner on arrival.
And seemed more precisely made and cleanly cut.
The white one seems a little “Chabuduo”
This looks like it came straight from the mill. No lube on the threads, and tons of milling leftovers.
Five minutes later it’s cleaned, lubed and taken to the workshop for some sanding. P160 grit and now it’s silky smooth.
On a side note; the new white one felt lighter, so i measured them.
(without tailcap, as the older ones has a magnet glued on)
Black XP-G2 S4 5D (V1): 59,28g
Green Nichia 219CT: 59,84g
White Nichia 219CT: 58,08g
But then again, despite all this, at $35 it’s still a friggin steal
That’s the first thing I noticed also since I was switching batteries to my white one from my blue one. I wonder why that is
P. S. It took two weeks from date of order to my door here in New Jersey USA good work Hank. That makes number 10 or 12 or something got my finger on the button waiting for the D4 S
Would like to add one little thing. Yesterday i wanted to flash another firmware to my new white D4. For some reason the MCU would not read-write. after multiple attempts a tried a Q8 driver, same chip. It read on the first try.
But i could not read write anything to the new d4 driver :cry:
I found a couple references to low voltage protection in the OP
Wondering the one you gifted was V1, and perhaps that version did not have it? It looks like several people wrote about experiencing low voltage protection in their D4s.
Failed LVP sounds very strange. I’ve tested it using a bench power supply, and it has always functioned correctly. I also actually managed to run down the battery a couple times and LVP did what it was supposed to. Usually I recharge the cell at about 3.3V, but there have been occasions where I used LVP instead.
It could have overheated one or several components. If you can get a look at the driver (a good picture perhaps?) it would help to identify if there is a burned component. Look for a microscopic black volcano on one of the black components, the MCU or the MOSFET specifically…
Edit: If a component fried you’ll smell it, usually upon opening the light to remove the cell.
That’s why it’s so frustrating. I’ve flashed my two other D4’s multiple times, and other flashlights. Mostly the clip catches on first or after a few tries.
I tried at least 50 times to connect it to it. Flipped it over, tried the other board which worked right away. then back to the new D4. Same result :cry: