I read the whole thing… no mention of a repair, just replacing some lights solved some of the more severe issues, such as 24 hour battery drain. I had one of those, and yes, replacing solved that problem.
There is no reported fix for the lights that go to low instead of turning off.
here are my selected quotes from that thread
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https://www.candlepowerforums.com/vb/showthread.php?312316&p=3771800&viewfull=1#post3771800
[QUOTE=okwchin]The driver is only regulated between 1.7 and 3.1 volts. Anything above and below that the torch runs un-regulated. So running a NiMH, your running way below regulation, so your not getting full brightness, while on any rechargeable lithium, your getting a HUGE direct drive current. So accordingly, max on NiMH is disappointing, while Min on Lithium rechargeable is crazy bright.
The old D10 engine was regulated between 1.3 and 3.8 volts or something like that I vaguely recall from my testing. FAR more appropriate for the type of cells were using, and therefore produced far more predictable results. This D11.2 engine is just… annoyingly lacking in key finishing elements of the design.[/QUOTE]
[QUOTE=bedazzLED]OK, I’ve tried and tried to like these two lights but I have finally had enough. They have both been back and I have replacements. Although the battery drain is not the problem now, the lights are still just plain old flaky. The PD sometimes works, the shortcuts to hi/lo more often than not don’t, sometimes turning it off actually turns it on to its lowest setting instead off, ……
I love my EX10 and D10, but I’ll be stuffed if I’m going to spend any more time with these two lights. Nitecore is off the list for me now, even though these lights look good and are good when they work.[/QUOTE]
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my conclusions are
I like the v10 firmware without blinkies and lockout, and especially the D10 host, for its short crisp button response
the ex10 ti that started this journey for me, has a mushy button by comparison. I can cause failures to switch off, or on, or to be momentary on/off, if I press too fast or too shallow. otoh, the springs are not too stiff, I find it pleasant to use.
I find my EX11.2 buttons mushy and overly stiff by comparison.
There are failures to switch off, where I get low instead of off. From off, I sometimes get strobe or lockout when trying to turn on again…
The frequency of the switching off failures goes down if press more slowly and deliberately.
I no longer use 16340 LiIon, after seeing the runaway ramping, I switched to CR123.
CR123 drop to 5 lumens max output at 2.3v, which tells me any LiIon used should be protected, and or voltage monitored responsibly by an alert operator if using unprotected cells.
I expect 3 volt LiFeP0 4 will run regulated, unlike 3.7v LiIon
my EX11.2 have regulated output on CR123
I really like that they go down to 0.01 lumens low.
My D10 w sw45k is flawless in terms of function and button feel, using AA Eneloop. The low is 1 lumen, I wish it was lower.
My EX11.2 w 219b 3000k is a good nightstand light loaded w CR123, and the lowest level is more than low enough for my firefly needs
My EX11.2 w 219b 4500k is a fun little light, it may find a home in my car, loaded with CR123
I think the ramping UI is very cool.