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

All five stars! Certainly well-deserved, but still very impressive!

I scrolled through the reviews and was impressed by the number of photos shared by buyers.

Awesome to see reviews in many different languages, and fun to see some familiar usernames! :partying_face:

Mine arrived today in Manchester UK.

All good, no apparent issues. Build quality seems excellent and it’s bright as hell. Hot as hell too!

Tried it outside in the dark and it hit buildings about 150 metres away in a built up area with lots of ambient light.

Thanks to all involved.

I’m having a lot of fun shinning the Q8 around. Can’t help on the double click! :smiley:

However, since the switch leds are much brighter then expected - you can move around the house at night just with the green glow, did anybody estimate or measure the parasitic drain involved?

from post # 7351, Q8, PMS SEND TO THOSE WITH ISSUES BLF soda can light Tom E wrote:
I just confirmed the parasitic drain on the round #3 Q8:

with switch LED on: 135 µA

with switch LED off: 22 µA

not sure if he or anyone has measured a production light.

With one 3 Ah cell that is
3Ah/(135e-6A*24h*365d) = 2.5a runtime.

So the Q8 with 4 cells can light for 10 years the switch!

Assuming the production version has the same drain as the prototypes your talking years, so no worry.

As always, if your not using the light and it’s going to sit a long time, just twist the battery tube to break the connection.

Maybe someone can measure the drain on a production light that has the overly bright switch leds?

Just take a DMM and set it to measure DC current and use one battery then use just the head facing down. Touch the positive tip of the cell to the big ring then run the DMM wires from the cell negative to the outer ground ring on the driver. Should be pretty easy. You may have to wait 6 (?) seconds for the mcu to go to sleep.

Does this sound correct?

My local usps has it. I can tell because the sky is lit up down across town :wink: hahaha.
I’ll have an update tomorrow . I can’t wait to try this thing out. Ever since it was first discussed. I am the one that asked for low voltage protection and you guys put it into the list right away.
It is cool to have been a little small drop in the bucket of this light from back when you guys started discussing it. ( post #20)

Yes sounds good, only measuring µA can be a bit tricky with older multimeters.

My old one can’t, so I ordered the ANENG AN8008 , it can go down to 0.01 µA (some shops have them for below $20).

Man, I don’t come here often and this is my fist new light in a while, but I’m EXTREMELY impressed. The UI alone is a massive feat, with so many features that I haven’t even attempted to try them all. I just regret not buying as many as I could possibly order at $40, that’s just an absolute steal.

I want to thank everyone involved for doing such an amazing job on this!

Can’t wait for mine to show up! BG has the tracking number but I don’t know where to track them…. I even throw the whole number in google and tried each carrier. And none of them were correct… Same thing goes with my MF01.
Expected delivery date are 10/23 for the MF01, and 10/26 for the Q8 But I have no idea where they are staying now lol

Not sure about the reward on that one but I did have one in FL about 20 years ago and that one was for 167Mph but I settled that one out of court.

This was also posted in post #2.

I tested my production light and registered 20 µA with the LED off. Given it’s not a high end DMM and the variance is only 2 µA, I’d say production is the same as the test sample.

With any luck 1 of 3 will land tomorrow. I got notification that it was on it’s way from Dallas to my home town, so it should show in the morning as out for delivery. :wink:

Edit: That might be presumptuous of me, as there are multiple stock tanks and watering holes between here and Dallas it might want to check out on the way here. We’ll see. lol

I got my q8 today. ( Expected delivery date is wed.)… so happy with this light… I don’t find anything wrong with this light so far… I am using Samsung 30q button top… so much lumen from this small light…thanks for the great deal to blf and banggood.

You may have missed the point here. We know the driver draws 22uA, it was the brighter than normal leds that we were wondering about. Since they are so much brighter than the prototype, we were looking for someone to measure the combined drain to see if it is much higher than 135uA.

The Miller, (and the rest of the team as well) have you got any feedback from ThorFire and BangGood? Are they happy with the results? Frustrated with dealing this closely with such a critical group? It looks like BangGood is trying to find the right price point, I see it in the deal thread for $78 now. It will be interesting to see where they settle.

Yep, I’ll confirm. I did miss the point on that. My apologies. I’ll try to redeem…

I went back and tested with switch LEDs on… with a cell at 4.09V, I got 128uA. I am not going to top of a cell just to test to see how much higher it goes, but I wouldn’t expect much higher than 135uA. Perhaps others will test as well to give some more data points.
This is basically noise in the data, but for the heck of it… with a cell at 3.35V, I got 76uA.

Just got mine today after 33 days from ordering it. I really like the ramp switch on it. A nice neutral lighting and it feels good in hand.

That’s good news, the really bright switch leds don’t increase the parasitic drain.

Hey guys,
my Q8s arrived on 30.09.17 in Hong Kong and until today they don’t move on. Anyone here experienced something similar?! I track them by 17track. I may be a little impatient but it seems quite long now.