BLF Q8 or alternative

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ltcdata
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BLF Q8 or alternative

Hi!

In 2013 i did not know a LOT of flashlights, and bought this:

https://www.fasttech.com/product/1502101-6xl2-6-cree-xm-l2-t6-3-mode-420...

With 4 of this:
Panasonic NCR 18650B Protected Rechargeable 3400mAh

Very happy with it. Very powerfull and respectable runtime.

But last week, i tried to turn it on (i always left the batteries inside) and it flashed and never turned on again.

So i’m shopping for a new flashlight, moore floodier than spot.

From what i’ve read, price/lumens there is no better option that the BLF Q8 and from BG till january 31 there is a discount and the flashlight is USD50 with an XP-L HD V6 3D (5000k).

The noctigon Meteor m43 would be my first choice, but it needs shorter unprotected cells (mine are the one of the most large cells). Also i’d love the choice of being able to choose the tint and it should be brighter than the Q8. But it is a lot more expensive (USD100) and in my country i can’t get cells for it.

So the question is: Can i use the blf q8 with my batteries? do they fit? (i know i will not get maximum lumens from them).

One of the problems i had with my old “SKR CLONE” is that everytime that you take out and in the batteries, you rotate the tube from the body of the flashlight, and erode the brass from the circuit. Is the Q8 the same way? or you can remove the batteries from the tail cap?

Thanks everyone in advance!!!

Nooner
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Your batteries should work in the Q8 without any issue.

Yes the batteries do rub the brass contact. However the Q8 has a several mm thick contact that will will not suffer from wear. It’s not like the light in the link you posted. The + battery contact is not just a trace on a PCB.

Get the Q8! You’ll love it!

ltcdata
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Nooner wrote:
Your batteries should work in the Q8 without any issue.

Yes the batteries do rub the brass contact. However the Q8 has a several mm thick contact that will will not suffer from wear. It’s not like the light in the link you posted. The + battery contact is not just a trace on a PCB.

Get the Q8! You’ll love it!

Yes, the light i posted lost almost all the brass after the 1st year.

Thanks, will do!!! i’ll order the Q8 Smile

Thanks!!!

Nooner
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Go to this site.
https://m4dm4x.com
If you sign up you will have access to different coupon codes for flashlights.

ltcdata
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Nooner wrote:
Go to this site. https://m4dm4x.com If you sign up you will have access to different coupon codes for flashlights.

oh, thanks!!!

Nooner
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(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
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Nooner wrote:
(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
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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
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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.

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ltcdata
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Lightbringer wrote:
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
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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.

...where Frugal meets with Flashlight!

ltcdata
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mortuus wrote:
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
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okay that sucks, where do u live even ?

...where Frugal meets with Flashlight!

BlueSwordM
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Yeah. Where do you live?

We can help you out.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

ltcdata
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mortuus wrote:
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 Sad

So.. i’ll start saving.

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

BlueSwordM
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@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-Rechargeab...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 Smile

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

ltcdata
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BlueSwordM wrote:
@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-Rechargeab...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 Smile

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
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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.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

ltcdata
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BlueSwordM wrote:
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 Smile (i prefer floodier)

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

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
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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

Mooooooo

Nooner
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totilde wrote:
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
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ltcdata wrote:
BlueSwordM wrote:
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 Smile (i prefer floodier)


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

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

ltcdata
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totilde wrote:
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!

ltcdata
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DavidEF wrote:
ltcdata wrote:
BlueSwordM wrote:
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 Smile (i prefer floodier)


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

Alibaba said they can’t do that.

I think i will save money for now, buy the BLF Q4 (more floodier wich i like, and also the warmer tint is a nice touch) and use them with my panasonics.

ltcdata
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Nooner wrote:
totilde wrote:
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.

My panasonics from what i’ve read are good up to 5A drain each cell and the BLF Q8 draws 20A max, and its 1S4P so i think maybe in max they trip the batteries protection, but i would be good a little lower from max.

djozz
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ltcdata wrote:
Nooner wrote:
totilde wrote:
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.

My panasonics from what i’ve read are good up to 5A drain each cell and the BLF Q8 draws 20A max, and its 1S4P so i think maybe in max they trip the batteries protection, but i would be good a little lower from max.


My 30Q’s with a stock BLF Q8 draw 16A, that is 4A each cell. The 18650B has a higher internal resistence so the current will be less than 16A, so you will be fine.
ltcdata
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djozz wrote:
ltcdata wrote:
Nooner wrote:
totilde wrote:
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.

My panasonics from what i’ve read are good up to 5A drain each cell and the BLF Q8 draws 20A max, and its 1S4P so i think maybe in max they trip the batteries protection, but i would be good a little lower from max.


My 30Q’s with a stock BLF Q8 draw 16A, that is 4A each cell. The 18650B has a higher internal resistence so the current will be less than 16A, so you will be fine.

Cool! thanks

ltcdata
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Hi! Update!
Customs usually takes 4-5 months… but after 2 weeks.. i got my BLF Q8!!!
I tought i would not like ramping and will be using it in discrete modes… boy i was wrong!
I love ramping! The tint is perfect, and is more throwier than i thought compared to my old SRK.
Love moonlight mode too. Very useful.
It took me a little time to understand the ui but after a few resets i was able to configure it.
Thanks everyone for your help!!

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There ya go… Big Smile

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