Sofirn Q8 group buy (gb closed, but try PM to Sofirn for discount)

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BlueSwordM
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Actually, that is normal.

At 3,2V, there is a low voltage warning.

At 3V, there is a full low voltage protection cut off.

With the cells sagging under load, it could easily be going down the 3V mark, and then when measuring the voltage, it will be idling voltage, not under load voltage.

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

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BlueSwordM wrote:
Actually, that is normal.

At 3,2V, there is a low voltage warning.

At 3V, there is a full low voltage protection cut off.

With the cells sagging under load, it could easily be going down the 3V mark, and then when measuring the voltage, it will be idling voltage, not under load voltage.

Odd because my BFL versions (3) are all on spec with a warning at no more then 3v and shutdown at 2.8v. all 3…. perfectly.

JasonWW
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FritzHID wrote:
interesting… My Sofirn Q8 flashed the low “batt signal” at 3.22v on my q35s tonight… at about 1/3 power…. Sad yeah, not well calibrated. did a full shutdown at 3.13v. this is an issue. !!!

FritzHID wrote:
BlueSwordM wrote:
Actually, that is normal.

At 3,2V, there is a low voltage warning.

At 3V, there is a full low voltage protection cut off.

With the cells sagging under load, it could easily be going down the 3V mark, and then when measuring the voltage, it will be idling voltage, not under load voltage.

Odd because my BFL versions (3) are all on spec with a warning at no more then 3v and shutdown at 2.8v. all 3…. perfectly.


I think NarsilM v1.0 is 3v warning and 2.8v shut down. If it shuts down a bit sooner I don’t think I would call it an “issue”. The batteries are still virtually dead. I usually recharge at 3.6v or 3.7v.

Do you typically run the batteries down real low?

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teacher
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I have not checked mine yet, but anything in the 3.2 V – 3.1 V range is OK with me. The batteries are about shot then anyway. Lower would not bother me either… the 3.0 V – 2.8 V would be fine too.
In most instances I am going to recharge them before they hit LVP anyway.

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

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djozz
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FritzHID wrote:
interesting... My Sofirn Q8 flashed the low "batt signal" at 3.22v on my q35s tonight... at about 1/3 power.... Sad yeah, not well calibrated. did a full shutdown at 3.13v. this is an issue. :!!!:

 

I don't know what q35s batteries are but here's the discharge curve of 30Q batteries (taken from HKJ's test):

 

At 3.22V resting voltage (=comparable to 0.2A discharge), there is 11% energy leftover in the battery (if you take HKJ's safe 2.8V as empty) , at shutdown 8%. The Q8 draws about 4-5A per battery, so at that discharge state the voltage under load is about 0.12V lower than the resting voltage, so 3.1 V in your Q8 at LVP-stepdown, which is a littlebit too high but nothing alarming, not much left in the battery anyway.

justanotherguy
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cant believe I missed this one

anyone in NE ILLinois into get togethers?

contactcr
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Riddle me this. My BLF Q8 tube works on both heads but my Sofirn tube only works on the Sofirn head.

My Q8 has been modded. Screws, bypass, Anduril, LEDs.

Any ideas what would cause this?

Tried two diff button tops. Indicator LED does not turn on.

Nachtfeuerzeug
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DB Custom, Thank you for the video! That tint isn't too far off from the XP-L HI, at least as far as I can tell.

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

https://imgur.com/a/9RkZISX

 

                                

 

JasonWW
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contactcr wrote:
Riddle me this. My BLF Q8 tube works on both heads but my Sofirn tube only works on the Sofirn head.

My Q8 has been modded. Screws, bypass, Anduril, LEDs.

Any ideas what would cause this?

Tried two diff button tops. Indicator LED does not turn on.


Possibly the o-ring. It might be preventing the tube from screwing all the way in so it touches the driver.

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DB Custom
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Or the throw of the threaded end is shorter, not allowing the ground contact to be made. Sometimes lights are like that, many lights you can’t flip the battery tube around for example.

contactcr
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the O ring on the Sofirn is in a slightly different place and it looks like in order to make that tube fit they removed a thread from the inside of the Sofirn head. You can see an entire extra row of threads in the BLF Q8 head

Nachtfeuerzeug
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I need two more 35Es for the full set, but I had some things laying around to put an 'adapter' together.  Precautionary measures like placing electrical/kapton tape over driver screws must be done but this could help in the scenario above or for using flat top batteries:

flat top adapter   link to album removed.

The 26mm OD copper washer stays in place as the friction against the batteries is greater than against the driver ring.  The O ring, I thought, might inhibit contact but it didn't and the light works. I also had an idea to insert slim dowels, tubes, etc. to hold it centered in place.  Another caution, the light is assembled on a flat surface, slowly, to make sure everything stays in place.

 

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

https://imgur.com/a/9RkZISX

 

                                

 

contactcr
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In the picture it looks like the bottom battery has damage to the wrapper. In that case nevermind the tape and screws it will just short to itself. Solder blob seems much easier

contactcr
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Also, in my example the batteries are making contact its the tube that isn’t. Ill just keep the original tubes with their own light but it does make you wonder what else they changed.

Nachtfeuerzeug
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contactcr wrote:
In the picture it looks like the bottom battery has damage to the wrapper. In that case nevermind the tape and screws it will just short to itself. Solder blob seems much easier

You're right about that. Good eye. These are some pack pulls and I used them for staging the photo.  In practice, I would use some brand new batteries that are spread across a few lights at the moment.

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

https://imgur.com/a/9RkZISX

 

                                

 

JasonWW
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This looks like an incredibly bad idea. It would be much safer to simply buy button top batteries or to solder blob existing flat top batteries.

Texas Ace Lumen Tube calibrated with Maukka lights

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Nachtfeuerzeug
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Jason, I have to agree with you.  Edit: Images removed for viewing via link.

 

Thank you for the photo link.  It seems I'm not able to make the linking work (??).

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

https://imgur.com/a/9RkZISX

 

                                

 

teacher
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JasonWW wrote:

This looks like an incredibly bad idea. It would be much safer to simply buy button top batteries or to solder blob existing flat top batteries.

This does show some ingenuity, but I have to agree with Jason…… “This looks like an incredibly bad idea.”

A very high chance it’s not a matter of “if” things go bad, only “when” they go bad.

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

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Nachtfeuerzeug
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teacher wrote:
This does show some ingenuity, _

Thank you!

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

https://imgur.com/a/9RkZISX

 

                                

 

teacher
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/\ . . Thumbs Up .. Smile

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

       Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$  

         Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart  

      Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help???            TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal 

 

                                             

2100
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Yeah, bad idea. When that copper top piece shifts due to a very hard knock/fall, the batteries might go kaboom. Though i have seen the datasheet, the 30Qs ought not to vent even with a dead short.

contactcr
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2100 wrote:
30Qs ought not to vent even with a dead short.

HJK replied to these datasheets in another thread saying venting is acceptable in these tests and not considered an explosion.

2100
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contactcr wrote:
2100 wrote:
30Qs ought not to vent even with a dead short.

HJK replied to these datasheets in another thread saying venting is acceptable in these tests and not considered an explosion.

Oh i see. I thought it would be the same as the Panasonic NCRs tested quite some years ago, dead short with low gauge stuff and they still didn’t vent, though of course the Panasonics IR are in the 40-50 ohms range.

2100
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Anyway, i am wondering if i should get the Sofirn Q8 as well. Already have the BLF Q8. Wonder what’s the current price. Smile Maybe will contact them via aliexpress.

Maybe they should get out a limited run special version with WW 3000K LEDs as well. Smile

I am wondering if any of you remember that “DRY triple XM-L” light, by Hank of intl-outdoor, quite a few years ago. He offered it in WW, NW and CW, even had versions in which the High mode is direct drive via the 3 × 18650 batts and with the batteries then it was driven just nice hot-rod at about 4 amps to the XM-L. Smile
This could be something like that, that one sold pretty well.

2100
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Can’t help it, ordered a Sofirn Q8 at a decent good price via aliexpress. PM them, you’d be surprised.

Together with the BLF Q8 neutral white @ usd 36, these puppies are extremely difficult to beat. There are higher lumens smaller pocket rocket/hot rods, issue is that Turbo runtime would be affected, especially since i am living in the tropics with night time temps of 29-31 deg C at 8pm. 27-28 deg C is considered decently “cold” here.

The original Q8 is a nice go to light, for short journeys they can even be carried in jeans pockets albeit uncomfortably. I’ll try to find a holster.
These soda can form factors are really very practical lights and useful in the real world. You want anything to fit better (slightly better) and it’d be like 2 x ROT66s, ie more than 2X the price, you want any more powerful lights with a decent throw and it’d be the Astrolux MF01/Mateminco MT18 @ 550 empty. And still throw less than these 2 x Q8 combo.

Hardcore flashaholic on the walk, 2 x portable Q8s, one in each hand. 400g empty, 13k lumens, 50-100kcd, easy to carry, great UI with firefly and illuminated button for easy finding of the light in the dark, 2-3 mins Turbo capable here in the tropics from cold start. 76usd incld shipping….cost low enough to trash really hard and gun Turbo in real life without fear or heart-ache. True to the original BLF’s budget motto. Really can’t be beaten.

GreenLights
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2100 wrote:
BLF Q8 neutral white @ usd 36

Where are you buying the Q8 from at this price?

Just discovered this wonderful addiction.

2100
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GreenLights wrote:
2100 wrote:
BLF Q8 neutral white @ usd 36
Where are you buying the Q8 from at this price?

Lazada.sg. I also do my shopping on shopee.sg (there is indonesian/Thailand/Malaysian shopee and i believe Sofirn does have stores and listings on those sites). It came in a box with Thorfire labels etc, so i think it’s legit.
The PE bag packaging is very typical what sellers in China would use for their local domestic 快递 couriers. So legit China.

There is a Lazada-Taobao partner ship also on Taobao, so i believe this could be an avenue for Chinese Taobao sellers to sell to customers here. Believe Lazada sells to South East Asian customers.
edit – Oh, Alibaba Group has taken over Lazada Group. LOL. Expected.

I did a search on lazada and the listing is gone now though….. Sad Wonder if that seller they were clearing last few pcs of stock, coz i did spread the Q8 love in other threads 1 week ago, there might be some Singaporean buyers lurking on this forum. Beer

Shipping is inclusive, it’s a bit difficult to describe things but basically the various China sellers ship to a central warehouse in which a shipping company (Ninjavan, Singapore start-up) working with its specific carrier works with Lazada, in which Lazada is affiliated with Taobao. I used the “priority shipping” for SGD 1.49 additional, the free shipping is probably via China Post Air Mail, could be registered air mail but it could also be normal air mail ie pretty high chance of it being lost.

So they’d probably ship 1 whole container or air pallet to Singapore, and after which that carrier (Ninjavan) would deliver to Singapore customers as the last-mile courier.

It’s somewhat similar to what official Taobao forwarders or 3rd party forwaders in which you can buy items from Taobao, consolidate up to 20 items (save on shipping) and one-shot ship to some countries like NZ, AU, USA etc. Folks in SG, TW, HK, MY are pretty comfortable with this kind of buying already.

This screenshot might give a better idea on how it’d flow for a China seller -> Singapore.

2100
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Sustained a decent nick from a 1.6m drop (face level) onto hard concrete last night.
The driver, MCPCB/soldering and LEDs survived the drop.

For those who are still sitting on the fence and wondering if such budget lights are capable of withstanding daily abuse, don’t worry too much.
Though the Sofirn and BLF Thorfire Q8 are from different manufacturers, i’d expect more similarities than differences generally.

Get both! Cheap enough overall, and you have 2 hands so you can theorectically get 11000 lumens. Smile
Get the best of both worlds, use them HARD and enjoy, that’s what it’s all about anyway.

The Q8 is an extremely practical package, Turbo is 3-min sustainable from cold in the tropics, probably closer to 5 minutes Turbo in winter climates. I have been scanning the whole current market…..yes I can buy a 20000+ lumens soda can pocket rocket light, use it here in the tropics and it wouldn’t last much more than 60 seconds and that’s from a dead cold start. Then you wait 5 mins for another gun on Turbo with a decent duration without kickdown. In reality during practical usage, i am really looking at just 15-30 seconds turbo runs coz i would have been already running the light in low to med powers earlier. But i guess of course these pocket rockets have their own very specialised usage areas.

DB Custom
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Sofirn claims to be the manufacturer that made the Thorfire lights.

So, according to what we’ve been told, same lights.

2100
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DB Custom wrote:
Sofirn claims to be the manufacturer that made the Thorfire lights.

So, according to what we’ve been told, same lights.

Good to know!

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