Prototype 3 arriving 7 of 7 now!! The Q8, a BLF premium edition SRK type monster flashlight

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cabfrank
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Okay, a question I should know the answer to, but just for assurance, how “matched” do the four matched cells need to be? Should we check capacity before using them as a set?

Texas_Ace
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cabfrank wrote:
Okay, a question I should know the answer to, but just for assurance, how “matched” do the four matched cells need to be? Should we check capacity before using them as a set?

As long as they are within .1-.2V they should be fine, the closer the better naturally.

I charge all my cells on a parallel charging bank and My rule of thumb is .5-.6V between cells before connecting them together. I have done as much as 1V without any effects though.

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Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

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My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

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Tom E
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Well, others are more qualified to answer this, but for me - reasonably close. Certainly they should be rated the same and be the same make/model, and hopefully a top 5 brand (LG, Sam, SANYO, PANA, SONY). Better still from the same batch, typically if bought at the same time. If you met those conditions, I'd feel safe enough. If fairly new and not much charge cycles, I wouldn't check, but if they are a bit older and racked up some usage, good idea to check they are charging up to the same level, taken into account charger slot differences, etc.

cabfrank
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That’s what I thought. Thanks guys.

DB Custom
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I don’t think the matching is as crucial with 4 cells in parallel, it’s in series where it really starts making a big difference.

That said, I still use the same batch, charge together, and watch for one to get off from the others both coming out of the light and going back in.

Dale

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DB Custom wrote:
I don’t think the matching is as crucial with 4 cells in parallel, it’s in series where it really starts making a big difference.

That said, I still use the same batch, charge together, and watch for one to get off from the others both coming out of the light and going back in.

yeah I have sets, check IR and mAh
use them as sets (both series or P)
when I put them in the charger check regularly to see if they all charge about the same.

PBWilson
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I’ve got to say that I’m absolutely giddy with delight over the idea that if TF gets this right (*crosses fingers AND toes), I’ll be wielding a pair of bada$$ lights at a superbly economical price. Thank you to everyone involved with getting this thing happening!

I wonder what the TF price will be after this initial group buy if it’s made per the specs on the first page. It seems like it will stack up against lights costing easily three or four times as much.

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Seems so simple doesn’t it? All they have to do is build the driver exactly as it was designed and tested and they have a serious top shelf winner on their hands. Don’t follow the recipe, they just have a mess.

Dale

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We pinged them again - no reply yet. Tonight will have the protected GA's in, so will add those and solder topped HG2's to the list.

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Tom E wrote:

We pinged them again – no reply yet

I work with many Chinese shop owners and the one thing I notice for 110% certainty is they are extremely tight as all mighty penny-wise. An example is asking for credit for literally 1/2 a bottle of fizzy drink – because the boxes come in 15’s, and 7 were leaking. I said I would credit half a box….. meaning the 7 damaged…. but he took me literally and demanded 7.5 were credited Facepalm
We are all hoping for that driver to be to 100% spec but I’ll be honest I’m getting a little apprehensive now. Obviously I know not of what’s going on behind the scenes. But I think 8 months is pushing the boat out……

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Adding latest battery tests, including the protected GA's just received last night, the LG2's with solder tops, and 30Q's solder tops to make the comparison with the LG2's

Measurement of the Protected GA's:

 

Measurement of the HG2's:

 

Measurement of the 30Q's (new cells):

 

Notes

  • Those Protected GA's seem to do well for protected cells, least better than I thought. They even out performed the solder top GA's. Could be being brand new, charged slightly higher, and the new Seiko high performing protection circuit, or combination thereof.
  • The last test of the solder top 30Q's produced the highest amps, even better than the VTC6's. These are also very new 30Q's recently bought from GearBest when they had them in the US warehouse. This may have been the first time used as well.
  • For the most part, lumens output and amps track pretty well.

Edit: Ooops, typo: lumens taken at 30 secs, not 20 secs

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Nice Tom
Good tests!
Thanks

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Nice info Tom. One question. Do you sleep? Smile

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

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Re: matched cells,
I don’t think the capacities or discharge rates of the cells need to match, only the voltage close enough so they don’t charge each other so fast they heat up. I am sort of planning to use whatever cells I am not using elsewhere, some of the time. It will run off the high discharge ones when in turbo mode and the high internal resistance ones will charge them back up when it is switched off. That won’t give 6,000 lumens, but it beats running on less than four cells.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

cabfrank
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Is that safe?

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Tom E wrote:


  • Those Protected GA’s seem to do well for protected cells, least better than I thought. They even out performed the solder top GA’s. Could be being brand new, charged slightly higher, and the new Seiko high performing protection circuit, or combination thereof.



Some of the better protected GA’s (e.g. Seiko chip and 3 MOSFET) have been measured to have minimal difference to unprotected at around 5A draw.

Thanks for all the tests. I’d be interested to see how well unprotected GA without solder blob works.

Fritz t. Cat wrote:
Re: matched cells,
I don’t think the capacities or discharge rates of the cells need to match, only the voltage close enough so they don’t charge each other so fast they heat up. I am sort of planning to use whatever cells I am not using elsewhere, some of the time. It will run off the high discharge ones when in turbo mode and the high internal resistance ones will charge them back up when it is switched off. That won’t give 6,000 lumens, but it beats running on less than four cells.

Is your local hospital burns unit expecting you?
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Fritz t. Cat wrote:
Re: matched cells, I don’t think the capacities or discharge rates of the cells need to match, only the voltage close enough so they don’t charge each other so fast they heat up. I am sort of planning to use whatever cells I am not using elsewhere, some of the time. It will run off the high discharge ones when in turbo mode and the high internal resistance ones will charge them back up when it is switched off. That won’t give 6,000 lumens, but it beats running on less than four cells.

Technically this is fine, it is the same thing I do when charging cells. I toss them all in the same parallel bank, only thing I worry about is the voltage, the brand, type and model all vary. Never an issue, never had a good cell get hot doing this. They all come off the charger at exactly the same voltage.

that said this can be abused by those that don’t check the voltage so best to put a disclaimer on this setup, only if you know what you are doing.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

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I personally would never use different capacities or discharge rate cells in one light. Like smoking a cigarette while fueling the car. Way too risky for me.

If I’ve got 4 cells in parallel supplying power to a driver, I want them to all run down in a similar fashion. If I don’t have 4 matched cells, or very close to being matched, I simply won’t use the light until I get 4 new cells in.

I won’t put different brands of tire on my car either, not only same tires on an axle but same tires all around for me. I’ve got well over a million miles behind me and this has never failed me, not gonna change it up now.

So there it is, for the record, the guy with several hundred builds behind him DOES NOT recommend mixing cells. Not different brands, not different capacities, not different voltages within a few hundredths (like 4.20, 4.19, 4.18 maybe… I’d probably toss the 4.18 to single cell use and re-order 4 for a light like this, too high on the amperage pull to mess around).

Dale

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DB Custom wrote:
I personally would never use different capacities or discharge rate cells in one light. Like smoking a cigarette while fueling the car. Way too risky for me.

If I’ve got 4 cells in parallel supplying power to a driver, I want them to all run down in a similar fashion. If I don’t have 4 matched cells, or very close to being matched, I simply won’t use the light until I get 4 new cells in.

I won’t put different brands of tire on my car either, not only same tires on an axle but same tires all around for me. I’ve got well over a million miles behind me and this has never failed me, not gonna change it up now.

So there it is, for the record, the guy with several hundred builds behind him DOES NOT recommend mixing cells. Not different brands, not different capacities, not different voltages within a few hundredths (like 4.20, 4.19, 4.18 maybe… I’d probably toss the 4.18 to single cell use and re-order 4 for a light like this, too high on the amperage pull to mess around).

sounds like solid advice to me!

Fritz t. Cat
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Different tires works too, but only if you know what you are doing and don’t slip up. I had a Fiat 850 in Europe and found cheep snow tires for it, but they were over-size and cross bias. So I drove this rear-heavy car with radials in front and cross bias in back. It worked, since I didn’t ever forget and drive it like a normal handling car.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

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I have not had 2 matching tires on my 4runner in, well since I got it come to think of it. Not by choice, I just could not bring myself to waste tires that still had tread and now that they don’t I can’t afford new tires lol.

you are not doing it right until you are Driving around with steel belts showing Grad

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

DB Custom
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Tom helped me out in a huge way and got one of his lights to me in time for my Brother-in-Law’s birthday. This is a Narsil firmware SupFire M6, light pipe beacon off the driver and with all the modifications… I got Josh’s wife to record him when he opened the package. He is 28 now, the look on his face seeing the light, knowing what it was after having seen my own M6 a couple of weeks earlier, he was stunned, in awe, and his wife giggled behind the camera as he exclaimed and oohed and ahhed. I spoke with him on the phone later and he said he was outside, after dark, actually talking to my wife on the phone (his sister) when His wife fired up the M6 from an upstairs balcony and lit up his backyard like daylight! He was just absolutely amazed. I told him he had another surprise in store for him… he’d only seen it with the new cells fresh out of the box… I suggested he charge the cells and check it out tonight! Smile (if he was blown away with it on nearly dead as-shipped cells, he’s gonna pass out when he sees it running on full power!)

Thank you Tom, very much appreciate your help in getting this to me so fast. Josh can’t believe his new flashlight has a 4 page operating manual! Big Smile

Edit: Of course I told him about the upcoming Q8, he’ll have to get a few for his friends after they see this M6 he just got. Wink He was quizzing me on how he could get more, he knows of 6 or 7 people that are gonna HAVE to have one after they see his… Wink

Dale

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in for one of these beasts

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DB Custom wrote:
Tom helped me out in a huge way and got one of his lights to me in time for my Brother-in-Law’s birthday.[…]

Great story, great people here! Thumbs Up
K.
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Kusie wrote:
DB Custom wrote:
Tom helped me out in a huge way and got one of his lights to me in time for my Brother-in-Law’s birthday.[…]

Great story, great people here! Thumbs Up
K.

Yeah +1
Will update list later
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Budget Light Forum…

Illuminating lower Mississippi/Alabama one redneck at a time. Wink

(Josh isn’t really a redneck, he welds on a pipeline at the Gulf Coast, pretty sure that’s the crew that will be getting Q8’s ASAP as well.)

Dale

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My 30Qs came in the other day, after testing them for resistance and capacity “for the record” as I do all “new to me” cells I fully charged them and did the solder blobbing today. The blobing was actually much easier than I envisioned. I didn’t think the solder would stick as readily as it did. My iron was a 27 watt model with a fairly large chisel point end. I cleaned the iron tip by putting it directly into the tin of Nokorode paste. Then I spread a film of the melted paste residue that was on the iron to the roughed up anode. Used a Dremel and a sandpaper disk for the roughing up.

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I’m in for one

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BrianK wrote:
My 30Qs came in the other day, after testing them for resistance and capacity “for the record” as I do all “new to me” cells I fully charged them and did the solder blobbing today. The blobing was actually much easier than I envisioned. I didn’t think the solder would stick as readily as it did. My iron was a 27 watt model with a fairly large chisel point end. I cleaned the iron tip by putting it directly into the tin of Nokorode paste. Then I spread a film of the melted paste residue that was on the iron to the roughed up anode. Used a Dremel and a sandpaper disk for the roughing up.

I don’t even sand then, just heat with iron, use good high quality kester solder, give it a few seconds and blob is done.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

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I’m in. Thank you

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