Sofirn SP70 Alone $50, PM for AMZ US CODE(LIMITED)

[mortuus]

@Lux-Perpetua

What about 21700 cells? If I recall correctly there were some discussions in the past that the SP70 should be working with 2x21700, too. Or am I totally wrong? In that case you could use 2x Samsung 40T for 30T to drain as much current as possible.

it says in the first post

2*26650 long tube(sleeve for 21700),

so i asume u will get a sleeve tube for those cells unless something changed after.

[JasonWW]

@mortuus

what do u mean? It said in the l6 thread Simon himself recommended the 5200 recommended keeppower cells or did i miss anything ?

They were never a good choice. Usually they were too long to fit. They also have big voltage sag.

Why did Simon recommend them back in late 2015/early 2016? Maybe there were a shortage of better 26650 cells that had raised tops? IDK.

Once I went to unprotected Liitokalas in my L6, I never went back. I did a lot of back and forth testing with them.

[kntx]

Huray we3 are getting closer,Sofirn ,please surprise us with nice quality light that we are all ready to pay

[Lux-Perpetua]

I wonder if the tube will be long enough and if the springs will be designed in a way to fit 2x21700. That would be a real feature for 2x Samsung 30T/40T will probably outperform any 26650 battery.

[JasonWW]

@Lux-Perpetua

What about 21700 cells? If I recall correctly there were some discussions in the past that the SP70 should be working with 2x21700, too. Or am I totally wrong? In that case you could use 2x Samsung 40T for 30T to drain as much current as possible.

Sofirn has been using their own 21700 4000mah cells in their last several tests.

[Lux-Perpetua]

@JasonWW

Sofirn has been using their own 21700 4000mah cells in their last several tests.

According to my tests these have a quite similar internal resistance compared to the Shockli 5500 (PLB-55-A cell).

https://budgetlightforum.com/t/-/51773/91

However, the 40T or even the 30T should perform even better as long as the electric path is capable to drain enough current from these cells.

[PBWilson]

@JasonWW

@PBWilson

The Shockli cells that I bought from Mountain Electronics are desribed as flat top on Richard’s site but they do protrude a bit and I would guess that they would work fine in series.

They do NOT touch.

Actually mine do indeed touch. I’ll see if I can snap a pic when I get home from work tonight. Maybe there are different versions sold by different vendors. I don’t know.

[Lux-Perpetua]

My Shockli 5500 (PLB-55-A) do make contact in the Convoy L6 but it is very "fickle". When I hold the L6 vertically with the head upwards it turns off.

[P33]

@JasonWW

It depends if you want maximum power or not. Do you want budget cells that perform “okay”? The Sofirn 5500mah cells seem to be about 5200mah. They will not give high outputs, but they are fairly cheap at $5.50 each. I believe these will be an option at time of purchase.

I would not recommend protected cells. It really depends on the specific protection circuit. Some are better than others. They all reduce output, though.

The blue and black Liitokala have been known to be good cells (require solder blobs), but lately some of the black ones seem to have counterfeits that sometime catch fire. So I can’t recommend them unless you know the source. For example the ones that Hank at International Outdoor sales with the D4S are known good cells.

The Shockli 5500 and KeepPower 6000 (unprotected) should be strong performers. These require solder blobs. The protected ones might be button top, but I’m unsure of their protection circuit. Maybe they allow high amps, maybe not. I don’t know.

Well, I obviously want as much as much power as possible, as long as the price is reasonable. What is unreasonable for me you ask? For example paying 2x more for 10% gain in lumens.
I’m not the biggest fan of protected cells either, just over the years read so many times that unprotected cells in series happen to die from time to time. In general I’m smart enough to figure out when to charge my batteries but still.

Another question would be how will 26650 fit in the flashlight if the tube is long enough for 21700. I hate rattling cells like nothing else.

Sad that Liitokala cells are tricky to buy genuine these days as these look really good on HKJ tests.

[mortuus]

@Lux-Perpetua

My Shockli 5500 (PLB-55-A) do make contact in the Convoy L6 but it is very “fickle”. When I hold the L6 vertically with the head upwards it turns off.

strange, if keeppower protected 6000 fits no problem then shockli doesnt? they cant be longer or ?

[Lux-Perpetua]

I'm not sure if I got you right, mortuus. The Shockli 5500 is a bit shorter in length compared to the (protected) Keeppower 6000. The latter one has a raised positive pole whereas the Shockli has not. Still, both batteries work fine in the Convoy L6. But the Shockli will only work as long as you hold the L6 horizontally as it is prone to rattle back and forth in the tube. The same happens with the Haikelite HT35.

[Lux-Perpetua]

@P33

[...]Another question would be how will 26650 fit in the flashlight if the tube is long enough for 21700. I hate rattling cells like nothing else.[...]

I can only imagine that springs on both ends have a very high deflection to fit both 650mm and 700+ mm cells. They will probably be much more compressed with 21700s, so contact resistance will also be less with fully compressed springs. I guess I drop the idea to use my SP70 with 26650 and use the best 21700s instead.

Or:

Sofirn has designed the tube for 21700 cells and sends adapters to extend 26650 cells to 700mm. I don't know...just thinking...

[mortuus]

@Lux-Perpetua

I’m not sure if I got you right, mortuus. The Shockli 5500 is a bit shorter in length compared to the (protected) Keeppower 6000. The latter one has a raised positive pole whereas the Shockli has not. Still, both batteries work fine in the Convoy L6. But the Shockli will only work as long as you hold the L6 horizontally as it is prone to rattle back and forth in the tube. The same happens with the Haikelite HT35.

ah okay sorry i thought shockli had a raised button top… makes sense then hehe.

[contactcr]

I bought shockli 5500s from their ali store and they sell button tops. I got the same cells from Mtn like 6 months ago so they are out there.

[DB_Custom (Dale)]

Golisi 26650’s are also top performers.

[P33]

@Lux-Perpetua

I can only imagine that springs on both ends have a very high deflection to fit both 650mm and 700+ mm cells. They will probably be much more compressed with 21700s, so contact resistance will also be less with fully compressed springs. I guess I drop the idea to use my SP70 with 26650 and use the best 21700s instead.

Or:

Sofirn has designed the tube for 21700 cells and sends adapters to extend 26650 cells to 700mm. I don’t know…just thinking…

Hope Sofirn does it properely (I’m kinda scared after the PL47 fiasco in this regard) - it’d be quite silly if double 26650 light works better with secondary cell choice (21700) then cells the tube is designed for.
I guess it’d be smart to hold up until first reviews start poping up. Or just wait for Sofirn to clarify that.

Will there be tripod mount on this light? I don’t remember now and it doesn’t seem prototype pictures work anymore.

[JasonWW]

@P33

it’d be quite silly if double 26650 light works better with secondary cell choice (21700) then cells the tube is designed for.

Not silly at all. Quite common.

The 21700 are a very tight fit.

I don’t think there will be a flat section with tripod mount.

[JasonWW]

I recieved my Shockli 5500 a couple weeks ago from MTN E. They don’t make contact. I suppose the tolerances can vary slightly. Some just barely touch and some just barely don’t.

[PBWilson]

@JasonWW

I recieved my Shockli 5500 a couple weeks ago from MTN E. They don’t make contact. I suppose the tolerances can vary slightly. Some just barely touch and some just barely don’t.

I wonder if Richard has sold different versions in the past months. I’ll post a pic when I’m off work.

[mortuus]

@JasonWW

I recieved my Shockli 5500 a couple weeks ago from MTN E. They don’t make contact. I suppose the tolerances can vary slightly. Some just barely touch and some just barely don’t.

button tops or…. do they fit l6