BLF Q8 or alternative

Nooner · 2019-01-22T17:43:13.000Z

(Now that I’m thinking about it)

The reason your current flashlight isn’t working may be because of the PCB erosion. The cells aren’t making good contact.

(If you have the tools)

One solution could be to try flowing some solder onto the battery contact ring. Try to build it up again. If it’s already broken it could be worth the try. Breaking it more wont hurt it.

ltcdata · 2019-01-22T17:45:58.000Z

Nooner:

(Now that I’m thinking about it)

The reason your current flashlight isn’t working may be because of the PCB erosion. The cells aren’t making good contact.

(If you have the tools)

One solution could be to try flowing some solder onto the battery contact ring. Try to build it up again. If it’s already broken it could be worth the try. Breaking it more wont hurt it.

Yes, i tried, but it seems that some electronic component is fried. I tried taking it apart, but i cannot do it (i do not want to damage it further).
I can remove the front bezel with the crystal, but the lens is glued. And from the battery/pcb side, there is no way to move it (only two very small holes, i can put pictures if you want).

Nooner · 2019-01-22T17:58:04.000Z

Up to you.
Just a thought I had for a possible solution.

If the problem is something other than the battery contact I personally wouldn’t try fixing the driver.

You could post pictures. I might not be able to help you. But there are tremendously knowledgeable people on this forum. Perhaps the hive mind can help.

Lightbringer · 2019-01-22T18:46:43.000Z

If you want more flood, make sure to stick with the BLF/Thorfire Q8, as the Sofirn Q8 is throwier, if I’m not mistaken.

ltcdata · 2019-01-22T18:47:59.000Z

Lightbringer:

If you want more flood, make sure to stick with the BLF/Thorfire Q8, as the Sofirn Q8 is throwier, if I’m not mistaken.

Thanks! Yes, i’ll stick with the BLF Q8.

mortuus · 2019-01-22T20:03:32.000Z

u shouldnt use protected batteries in the q8, just buy some 30q or something they dont cost much otherwise u dont get the highest lumens.

ltcdata · 2019-01-23T14:16:40.000Z

mortuus:

u shouldnt use protected batteries in the q8, just buy some 30q or something they dont cost much otherwise u dont get the highest lumens.

I don’t mind if i don’t get right know the highest lumens.
It’s impossible to find 30Q batteries here. When buying li-ion cells via air mail was cancelled due to regulations, it’s very impossible to buy them. That’s why i still stick to my old’s panasonics NCR18650.

mortuus · 2019-01-23T15:15:40.000Z

okay that sucks, where do u live even ?

BlueSwordM · 2019-01-23T15:48:13.000Z

Yeah. Where do you live?

We can help you out.

ltcdata · 2019-01-23T16:00:43.000Z

mortuus:

okay that sucks, where do u live even ?

I live in Buenos Aires, Argentina.

I’ve just found a place, they sell cells (3000mAh 30Q) for USD 16 each

So… i’ll start saving.

ltcdata · 2019-01-23T16:43:35.000Z

Well, they are flat top, so no good for the Q8.
Another place sells 30Q button top, but for USD21 each!

BlueSwordM · 2019-01-23T17:14:59.000Z

@ltcdata, what you want then is a Sofirn Q8:
https://www.aliexpress.com/item/Newest-Sofirn-Q8-4-XPL-HI-5000LM-Powerful-LED-Flashlight-18650-Multiple-Operation-Procedure-Super-Bright/32920587281.html

And ask them to include these 18650s:
https://www.aliexpress.com/store/product/Sofirn-3000MAh-18650-Rechargeable-Battery-Pre-charged-3-7V-Li-ion-Protection-18650-Batteries-for-LED/2933049_32926129538.html

They are button top, are capable of outputting 15A, and since they can be put inside of the flashlight, these are not only much cheaper, but also, they can actually be shipped

ltcdata · 2019-01-23T17:19:44.000Z

BlueSwordM:

@ltcdata, what you want then is a Sofirn Q8:
77.4€ |Sofirn Q8 4 stücke XPL HALLO 5000LM Leistungsstarke LED Taschenlampe 18650 Mehrere Bedienung Verfahren Super Helle Taschenlampe IPX8 Lange Werfer|LED-Taschenlampen| - AliExpress

And ask them to include these 18650s:
13.52€ |Sofirn 3000MAh 18650 Akku Pre aufgeladen 3,7 V Li Ion Schutz 18650 Batterien für LED Taschenlampe Lanterna Tatica|Tragbare Beleuchtung Zubehör| - AliExpress

They are button top, are capable of outputting 15A, and since they can be put inside of the flashlight, these are not only much cheaper, but also, they can actually be shipped

Aliexpress won’t ship the batteries, they treat that as 2 different products. I asked them (and many others) to please, ship the flashlight with the batteries inside and they denied to do that. This was a year ago.
Do you think they can do that know?

BlueSwordM · 2019-01-23T17:23:41.000Z

Yes, Sofirn has done that before, multiple times even for people who could not get good 18650s for acceptable prices.

The advantage Sofirn has over other sellers is that not only are they very friendly, but since they are the OEM for the lights, they can easily put in the cells inside of the Q8 before they ship.

I’ve asked them before about this, and they said that it was okay to ship inside of the light, but not separately.

ltcdata · 2019-01-23T18:02:18.000Z

BlueSwordM:

Yes, Sofirn has done that before, multiple times even for people who could not get good 18650s for acceptable prices.

The advantage Sofirn has over other sellers is that not only are they very friendly, but since they are the OEM for the lights, they can easily put in the cells inside of the Q8 before they ship.

I’ve asked them before about this, and they said that it was okay to ship inside of the light, but not separately.

Oh, nice! i’ll write to alibaba right now!

If the sofirn is a little throwier i don’t mind if i can buy the batteries with it (i prefer floodier)

SIGShooter · 2019-01-23T18:47:12.000Z

ltcdata:

Well, they are flat top, so no good for the Q8.
Another place sells 30Q button top, but for USD21 each! :person_facepalming:

You can put a small solder blob on the flat tops in a few seconds. Don’t need much to insure that they make contact with the brass ring.

totilde · 2019-01-23T18:58:10.000Z

In my opinion you can easily avoid buying new cells, and use those you have. you won’t notice a big difference, especially if you don’t have other cells to compare. It’s plenty bright even with 18650b. I have 30q’s and 18650B’s and use whatever cells are charged when I need them, can’t tell which ones I’m using. save some money and the trouble

Nooner · 2019-01-24T02:11:12.000Z

totilde:

In my opinion you can easily avoid buying new cells, and use those you have. you won’t notice a big difference, especially if you don’t have other cells to compare. It’s plenty bright even with 18650b. I have 30q’s and 18650B’s and use whatever cells are charged when I need them, can’t tell which ones I’m using. save some money and the trouble

+1

I just tried using some protected cells in my Q8 to see how it looked. I didn’t notice any less output. There likely was less, but I couldn’t tell.

DavidEF · 2019-01-24T02:15:55.000Z

ltcdata:

BlueSwordM:

Yes, Sofirn has done that before, multiple times even for people who could not get good 18650s for acceptable prices.

The advantage Sofirn has over other sellers is that not only are they very friendly, but since they are the OEM for the lights, they can easily put in the cells inside of the Q8 before they ship.

I’ve asked them before about this, and they said that it was okay to ship inside of the light, but not separately.

Oh, nice! i’ll write to alibaba right now!

If the sofirn is a little throwier i don’t mind if i can buy the batteries with it (i prefer floodier)

I recommend that you don’t write to Alibaba, but rather contact Sofirn here.

ltcdata · 2019-01-24T15:09:01.000Z

totilde:

In my opinion you can easily avoid buying new cells, and use those you have. you won’t notice a big difference, especially if you don’t have other cells to compare. It’s plenty bright even with 18650b. I have 30q’s and 18650B’s and use whatever cells are charged when I need them, can’t tell which ones I’m using. save some money and the trouble

Thanks! will do!