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

1270 posts / 0 new
Last post
teacher
teacher's picture
Offline
Last seen: 9 months 2 weeks ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

Ok…… but ‘I’ am still not gonna do it. Wink

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 

 

                                             

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

I’m with teacher, won’t catch me mixing cells like that.

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.

contactcr
Offline
Last seen: 5 hours 6 min ago
Joined: 05/19/2017 - 18:52
Posts: 2948
Location: US

Do solder blobs perform much better than button tops or is it negligible? 30Q’s and the 10A Panasonic/Sanyo are easy to find in BT but seems like almost nothing else is readily available.

klrman
klrman's picture
Offline
Last seen: 28 min 39 sec ago
Joined: 11/07/2016 - 22:44
Posts: 2613
Location: Canada

JasonWW wrote:
teacher wrote:
Your _+'playing with fire'+_ doing it how you mentioned you were. :O
No, it was fine. They were all fully charged and at 4.2 volt. People mix all different battery sizes in parallel setups. It's in *series* that you need all them to be identical. Like with the BLF GT. You can put 4 identical 3500mah in one carrier and 4 identical 2000mah in the other carrier. This will work fine as the carriers are in parallel. The 4 battaries in each carrier are in series, so those 4 need to be identical and matched up. When batteries are in series the voltages can vary and the low voltage protection only sees the total voltage. So you could have 3 cells at 3.2v and one at 2.4v and the lvp would see 3v total and think it's fine, but really one battery has gone much too low. This can ruin that battery and make it dangerous to continue using.

 

I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V.  Is the spread in voltage safe enough to use in parallel in my Q8?

Aleister
Aleister's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/23/2010 - 15:27
Posts: 726
Location: Greece

klrman wrote:

JasonWW wrote:
teacher wrote:
Your ‘playing with fire’ doing it how you mentioned you were. Shocked
No, it was fine. They were all fully charged and at 4.2 volt. People mix all different battery sizes in parallel setups. It’s in series that you need all them to be identical. Like with the BLF GT. You can put 4 identical 3500mah in one carrier and 4 identical 2000mah in the other carrier. This will work fine as the carriers are in parallel. The 4 battaries in each carrier are in series, so those 4 need to be identical and matched up. When batteries are in series the voltages can vary and the low voltage protection only sees the total voltage. So you could have 3 cells at 3.2v and one at 2.4v and the lvp would see 3v total and think it’s fine, but really one battery has gone much too low. This can ruin that battery and make it dangerous to continue using.

 


I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V.  Is the spread in voltage safe enough to use in parallel in my Q8?


Yes, it’s safe

Let a flooder be my wife and a thrower be my mistress

klrman
klrman's picture
Offline
Last seen: 28 min 39 sec ago
Joined: 11/07/2016 - 22:44
Posts: 2613
Location: Canada

Aleister wrote:
klrman wrote:

I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V.  Is the spread in voltage safe enough to use in parallel in my Q8?

Yes, it's safe

 

Is there some type of maximum difference in voltage before batteries should be charged again until they are closer before using in parallel?

KawiBoy1428
KawiBoy1428's picture
Online
Last seen: 31 sec ago
Joined: 04/11/2014 - 18:05
Posts: 4096
Location: The Motor City

DB Custom wrote:
I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.

That is remarkable, I’m getting 5780 with brass screws and 18awg spring bypass’s VTC5A’s 4,21v off the charger….the bypass’s only netted me 3-400lm more, so the springs are not so bad. The three times I did this all the batteries were drained to the exact same voltage, so I know the raised flat tops are all making full contact.

KB1428 “Live Life WOT

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

Stock, out of the box, it made 5775.3 lumens on the 30Qs fresh off the charger.
With brass M3 screws it made 5909.85 lumens on the 30Q’s fresh off the charger. A 134.55 lumens gain.
With Blue’s springs it made 6020.25 lumens on the 30Q’s fresh off the charger. A 110.4 lumens gain.
With 20ga spring bypasses it makes 6330.75 lumens with the 30Q’s, again, fresh off the charger. A 310.5 lumens gain for an overall increase of 555.45 lumens since I took it out of the box just after lunch.

Edit: At this point, I haven’t opend the bezel end nor have I touched the screws holding the driver in.

djozz
djozz's picture
Offline
Last seen: 6 hours 1 min ago
Joined: 09/07/2012 - 17:04
Posts: 16905
Location: Amsterdam
KawiBoy1428 wrote:
DB Custom wrote:
I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.
That is remarkable, I’m getting 5780 with brass screws and 18awg spring bypass’s VTC5A’s 4,21v off the charger….the bypass’s only netted me 3-400lm more, so the springs are not so bad. The three times I did this all the batteries were drained to the exact same voltage, so I know the raised flat tops are all making full contact.

I already noticed that the XPL-Hi leds performed a bit better that they should in a completely unaltered Q8, so the difference may indeed be better conducting springs.

JasonWW
JasonWW's picture
Offline
Last seen: 2 hours 4 min ago
Joined: 10/22/2016 - 11:41
Posts: 12463
Location: Houston Texas

klrman wrote:

I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V.  Is the spread in voltage safe enough to use in parallel in my Q8?


That’s really close. 11 hundredths thousandths. It’s when you have a bigger gap that you get a bigger transfer of energy. So 1 tenth of a volt will probably transfer a lot of energy really quickly. Your 11 hundredths thousandths only transfers a little energy. Not enough to hurt anything. I’m not really sure how big a difference is okay and what’s not. I’ve heard of battery chargers deviating 4 or 5 hundredths. So 1 hundredth can’t be that bad.

Does anyone have any first hand experience with this? How much is too much difference?

Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights

Click this to go to signature links. I'm still around, just not reading many new threads.

JasonWW
JasonWW's picture
Offline
Last seen: 2 hours 4 min ago
Joined: 10/22/2016 - 11:41
Posts: 12463
Location: Houston Texas

KawiBoy1428 wrote:
DB Custom wrote:
I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.

That is remarkable, I’m getting 5780 with brass screws and 18awg spring bypass’s VTC5A’s 4,21v off the charger….the bypass’s only netted me 3-400lm more, so the springs are not so bad. The three times I did this all the batteries were drained to the exact same voltage, so I know the raised flat tops are all making full contact.

I think DB’s light box might read higher than yours. So it may not be a direct comparison.

Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights

Click this to go to signature links. I'm still around, just not reading many new threads.

contactcr
Offline
Last seen: 5 hours 6 min ago
Joined: 05/19/2017 - 18:52
Posts: 2948
Location: US

Would be cool if someone could take their q8 body and put on sofirn q8 head and measure both using the same body. Relative difference between two emitters ya know

KawiBoy1428
KawiBoy1428's picture
Online
Last seen: 31 sec ago
Joined: 04/11/2014 - 18:05
Posts: 4096
Location: The Motor City
djozz wrote:
KawiBoy1428 wrote:
DB Custom wrote:
I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.
That is remarkable, I’m getting 5780 with brass screws and 18awg spring bypass’s VTC5A’s 4,21v off the charger….the bypass’s only netted me 3-400lm more, so the springs are not so bad. The three times I did this all the batteries were drained to the exact same voltage, so I know the raised flat tops are all making full contact.

I already noticed that the XPL-Hi leds performed a bit better that they should in a completely unaltered Q8, so the difference may indeed be better conducting springs.

The springs are not only better they are much stouter and longer than the BLF Q8’s so you are getting way better contact then the old BLF Q8, I tried bouncing the batteries off the driver trying to break the contact, my hand is still sore….my BLF Q8’s were so very easy to do before I modded them. I asked Sofirn to sell me a couple of the Sofirn Q8’s spring PCB’s for my stock BLF Q8’s I have in storage….they said they will take care of me. Thumbs Up Got to Love that! Wink

KB1428 “Live Life WOT

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 3 hours 15 min ago
Joined: 11/29/2017 - 12:34
Posts: 5524
Location: Canada

Wait, could someone actually picture and measure the height of the springs?

I have the impression they actually changed the spring material to phosphor bronze, or even BeCu Cash

Also, how stiff are they? If they’re a bit stiffer, then they should be phosphor bronze. If they are again a bit stiffer, they should be BeCu C17530. If they are VERY STIFF, which seems not to be the case at all, BeCu C17500. Although that would restrict compatibility quite a bit due to its low yield strength and high plastic deformation potential.

I also have the feeling they made the inner spring taller and thicker to make for a better dual spring array, so higher conductivity.

TLDR: Higher conductivity materials and/or better dual spring array.

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

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

Opened up the driver bay and they have what appears to be 18ga leads on it already. I swapped the FET for the Infineon FET from my BLF GT mini, to gain only 48.3 lumens. At any rate, I now see 6379.05 lumens at start with fresh charged 30Qs.

teacher
teacher's picture
Offline
Last seen: 9 months 2 weeks ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

klrman wrote:

I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V. Is the spread in voltage safe enough to use in parallel in my Q8?
That is a difference of ’11 thousandths’ of a Volt klrman… Nothing at all to worry about in any way for parallel or series connections.

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 

 

                                             

Nachtfeuerzeug
Nachtfeuerzeug's picture
Offline
Last seen: 3 weeks 5 days ago
Joined: 08/31/2013 - 16:10
Posts: 498

teacher wrote:
ToyKeeper wrote:
BROODMASTER wrote:
This is my first soda can light ... I don't have 4 same brand/model button tops so tonight,  I loaded it with 2x 35Es, 1x blue 25R and a Nitenumen 3400 protected (Nu 188).
*Mixing cells is dangerous*. Putting four different cells in, especially at different voltages, can easily cause problems. They will equalize their charge as quickly as the cells can manage, with some cells basically charging others at a rate far higher than they are intended to be charged. This can melt the springs or damage the batteries or make it overheat. Get four identical cells and treat them as a set, like they're a single unit. Married, basically. They charge together and discharge together and always go in the same light at the same time.
contactcr wrote:
BROODMASTER wrote:
Hi TK... we are up late!  They were all at 4.2V when I started but I'll definitely have a matched set, soon. I should be putting in an order with Mountain Electronics soon! Thank you!
*_She doesn't mean just the voltage_*. The cells have different characteristics and resistance so while you run the light the "worst" cell will be over stressed trying to balance out to the rest of them. In the meantime, just run the 2x 35E's (and leave 2 slots open) and you shouldn't even notice an output difference.
*+1* .... BROODMASTER..... Great advice from TK & contactcr, I hope you heed it. Thumbs Up Your _+'playing with fire'+_ doing it how you mentioned you were. :O

 

 

Wow! You guys and gal summed it quite clearly. Thank you. I meant to relay the experience so I cut out some details.

I have a Miboxer C4 and of the four (out of 6 button tops I have), they are all under 20 cycles with 36 mOhms for the 25R, ~70 for the 35E and ~100 for Nu 188. 

I bought those 30q Ali fakes for a multi- batt light but not button top. Solder blobbing came to mind. Just didn't have time.

As far as series V'S parallel, I'm wary about series but I've been using a 3C light with two 18650s in parallel. New batteries, old pack pulls, etc. w/o problem but I monitor SOC regularly.

I prefer 30q but since I have two 35Es already, I'll probably just buy two more. I'll derive more current via brass screws and spring bypasses.

I read as much on best practices as I can and y'all's posts certainly are part of that curriculum. Thank you!

EDC

FW3A, SST20 4000K || S21A, Crescendo MTNdd 20mm, LH351D 4000K || SP32A, SST40 5000K

Recent/ongoing Mods:

S2+, TexAven 17mm, LH351D | S21A, Crescendo 20mm, LH351D 4000K | L2 w/6A 20mm SST40 driver, XP-L HI | C8+ OP, DD XHP-50

SP32A w/SST40 5000K | SK Zoomie Nichia 5000k, C2 driver | EagleTac clip | Ultrafire C2 w/5A 17mm & XM-L2 | Nichia 219C 2700K with gray S6 |

Reviews:

Sofirn SP31 v2.0 Tactical Flashlight (Cree XPL HI) || Sofirn SD05 Scuba Diving Flashlight || Sofirn SC31 USB Rechargeable (XP-G3)

KawiBoy1428
KawiBoy1428's picture
Online
Last seen: 31 sec ago
Joined: 04/11/2014 - 18:05
Posts: 4096
Location: The Motor City

JasonWW wrote:
KawiBoy1428 wrote:
DB Custom wrote:
I got my Sofirn Q8 today from Amazon. Charged up 4 30Q cells with a solder blob on the otherwise flat top, straight away right out of the box it makes 5775.3 lumens.

That is remarkable, I’m getting 5780 with brass screws and 18awg spring bypass’s VTC5A’s 4,21v off the charger….the bypass’s only netted me 3-400lm more, so the springs are not so bad. The three times I did this all the batteries were drained to the exact same voltage, so I know the raised flat tops are all making full contact.

I think DB’s light box might read higher than yours. So it may not be a direct comparison.

Maybe, maybe not. I say remarkable because I use the XP-L HI V3’s almost exclusively in most of my 3v builds, it is my favorite, go to Cree emitter, I especially like the V3-1A. I have also seen them vary quite a bit in output, Dale might have got some high end freaks, like in my D4S V3-1A it will do 6300+ on a 30T off the charger and 5800-5820 on a Golisi off the charger repeatably every time and that is with only a thin copper driver contact and copper braid bypassed tail spring, never touched/opened the head on the D4S. I think the new Noctigon Quad board has a lot to do with it also. I have had some V3’s pull over 7-7.25 amps (shocked the hell out of me) for 1780-1800lms naturally at turn on. And I have yet to burn one out, like some have claimed?

KB1428 “Live Life WOT

ToyKeeper
ToyKeeper's picture
Offline
Last seen: 1 hour 41 min ago
Joined: 01/12/2013 - 14:40
Posts: 10291
Location: (469219) 2016 HO3
DB Custom wrote:
At this point, I haven’t opend the bezel end nor have I touched the screws holding the driver in.

If you flash it, remember to grab the latest version first. Smile

http://toykeeper.net/torches/fsm/

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

Well thank you TK, I will flash it next. Big Smile

It now makes 8659.5 lumens. Smile a gain of 2280.45 lumens over the last iteration and 2884.2 lumens more than when it came out of the box a few hours ago. Sorry it took me so long, had to eat lunch and take care of some other bidness.

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 3 hours 15 min ago
Joined: 11/29/2017 - 12:34
Posts: 5524
Location: Canada

Ok WUT?

Did you get that kind of brightness out of secret extreme high bin XPL-HIs or another type of LED?

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

klrman
klrman's picture
Offline
Last seen: 28 min 39 sec ago
Joined: 11/07/2016 - 22:44
Posts: 2613
Location: Canada

teacher wrote:
klrman wrote:
I just charged  four new 30Q button tops to 4.1V and they ended up from 4.080 to 4.091V. Is the spread in voltage safe enough to use in parallel in my Q8?
That is a difference of _'11 thousandths'_ of a Volt klrman... Nothing at all to worry about in any way for parallel or series connections.

 

I thought it was 11/100th of a volt?  I was just curious as to what the threshold would be just for my own info.

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

You know me Blue, couldn’t leave power in the kit… I swapped in XP-L2’s. (2 5000K and 2 5700K for a mixed tint)

KawiBoy1428
KawiBoy1428's picture
Online
Last seen: 31 sec ago
Joined: 04/11/2014 - 18:05
Posts: 4096
Location: The Motor City

DB Custom wrote:
You know me Blue, couldn’t leave power in the kit… I swapped in XP-L2’s. (2 5000K and 2 5700K for a mixed tint)

Can I have your V3’s Big Smile

KB1428 “Live Life WOT

Nachtfeuerzeug
Nachtfeuerzeug's picture
Offline
Last seen: 3 weeks 5 days ago
Joined: 08/31/2013 - 16:10
Posts: 498

DB Custom wrote:
You know me Blue, couldn't leave power in the kit... I swapped in XP-L2's. (2 5000K and 2 5700K for a mixed tint)

 

I think I'd like to bring you lunch and a light for modding!

EDC

FW3A, SST20 4000K || S21A, Crescendo MTNdd 20mm, LH351D 4000K || SP32A, SST40 5000K

Recent/ongoing Mods:

S2+, TexAven 17mm, LH351D | S21A, Crescendo 20mm, LH351D 4000K | L2 w/6A 20mm SST40 driver, XP-L HI | C8+ OP, DD XHP-50

SP32A w/SST40 5000K | SK Zoomie Nichia 5000k, C2 driver | EagleTac clip | Ultrafire C2 w/5A 17mm & XM-L2 | Nichia 219C 2700K with gray S6 |

Reviews:

Sofirn SP31 v2.0 Tactical Flashlight (Cree XPL HI) || Sofirn SD05 Scuba Diving Flashlight || Sofirn SC31 USB Rechargeable (XP-G3)

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

Ok TK, flashed with the 2018-09-07 variant, no switch light. What have I forgotten?

DB Custom
DB Custom's picture
Offline
Last seen: 1 day 10 hours ago
Joined: 01/13/2013 - 22:28
Posts: 20623
Location: Heart of Texas

Sure Kawi, as you’re aware they only ran less than a minute while I tested the few stages of build.

PM me your addy, was there anything else I was supposed to be sending that I’ve forgotten? Some Samsung LH351D 5000K 80 CRI or something? Got a couple of Oslon Black Flats you can play with too if you want…

contactcr
Offline
Last seen: 5 hours 6 min ago
Joined: 05/19/2017 - 18:52
Posts: 2948
Location: US

I mean if Kawi wants to trade 4 of these magic HI’s for one of his clean 70.2 de-domes i’m sure he could get a bunch Big Smile

ToyKeeper
ToyKeeper's picture
Offline
Last seen: 1 hour 41 min ago
Joined: 01/12/2013 - 14:40
Posts: 10291
Location: (469219) 2016 HO3
DB Custom wrote:
Ok TK, flashed with the 2018-09-07 variant, no switch light. What have I forgotten?

Not sure. I just tried it on mine to be sure, and it works. You grabbed the Q8 version, right? Avrdude should report 7996 bytes flashed.

Pages