Q8, PMS SEND TO THOSE WITH ISSUES BLF soda can light

Are the driver diameters the same?

Make sure not to bypass the springs.

I would think heat would be the biggest issue since the clones donā€™t use a DTP mcpcb, plus the shelf are usually paper thin if it even has a shelf.

Check out this video David Sunshine did a while back. https://youtu.be/efl0R63-ik0 I think he piggybacked a new driver instead of swapping it. He has a lot of details.

Are you using button top or flat top batteries?

Iā€™ve used a button top battery.

The chargers I have do not start charging this battery.
The voltage was just over 2 volts, as far as I remember.

Thanks Jason for the measurement instruction. :+1:

What Iā€™m wondering is how the battery got down below 2.8v. This is the cutoff voltage. The driver should not draw any power below 2.8v. If it did, something seems wrong.

Does only one of your three Q8s drain the batteries fast? Maybe it has a defect in the driver? I donā€™t know.

Doing a drain test might give some answers.

Maybe the MCU is not going to sleep after 6 seconds like it should? Iā€™ll ask ToyKeeper.

I think I remember that LVP detection does not work when parasitic drain is lowering the voltage very slowly. Tom would know that better though.

Tom is barely around any more. :cry:

So the lvp only works when the light is turned on? Well that is a bummer. I assumed it worked all the time.

I wonder whatā€™s causing his drain, though.

AFAIK no LVP can prevent undervoltage by parasitic drain,

Yeah, I guess that makes sense. You actually need to MCU to be operating and taking samples of the voltage in order to determine whether or not itā€™s above or below the threshold and that process is just going to create increased parasitic drain.

Mine was from the second batch (#501-1000), which had the first batch issues fixed. It has been working great since I got it, and it gets used quite a bit. In terms of sheer number of hours, it has probably been my most-used light over the past year, but Iā€™m not sure if that counts since itā€™s a whole lot of candle mode.

Anyway, no issues at all. And the button LED has been on pretty much nonstop the whole time.

Exactly.

The MCU also has BOD (brownout detection) enabled, but that doesnā€™t activate until 1.8V. So, if it gets that low, itā€™ll shut the MCU off even more than it normally can. Which probably wonā€™t have a significant effect on the parasitic drain.

But LVP (which shuts off at 2.8V) only works when the light is actually on. And it sounds like whatever is draining happens when the light is off. So get out a DMM and start measuring things. Itā€™s probably a hardware issue.

I have one from the second batch. Itā€™s been flawless in every way.

Are they marked with a number?

Thanks, im using one of the MTN boards, silicone 18awg wire to leds and 4 30Qs spring bypass and brass screws.

Just over 13 amps to the emmiters.Gets hot PDQ.

Its only a super cheap SRK clone by Securitying

/\ā€¦ No, they are not marked with Batch or serial numbers.

Thank you.

How many people are interested in trying a new Q8 with XPL HI leds?

And how many people are interested in a light smaller than Q8, I mean with 3 * 18650 battery tube, but with the same driver and USB C charging port?

Well, quite a bit :slight_smile:

Iā€™d be more interested in a Triple XP-L HI V3 1A with the 3 Bigger Reflectors and 4 cells. :+1:

Larger rather than smaller. USB charging doesnā€™t add value for me.

Triple XP-L HI V3 1A with the 3 Bigger Reflectors and 4 cells +1

I agree with Sillenā€¦.
ā€¦ā€¦. USB Charging on a light such as this adds nothing of value. :slight_smile: