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

Yes they are.

Thank you!

Disappointing news for the Sofirn 26650 HD cells.

Measured at 30 second with my calibrated lumen tube - 4970 lumens

So much for their 6800 lumen measurement they stated with these

You sure they are even the right ones?

Yes, they have the 5000mAh 25A wrapper and have the new button top

Fully charged?

Yeah, they’re charged to 4.20v and checked again with my DMM.

I’ll test them later with my CBA because it seems they’re discharging unevenly. After 30 sec they were 4.14v and 4.18v

Please provide some context.
How many lumens do a different set of high drain batteries produce? What other cells do you have?

After bypassing the springs with 20awg I get 5900 at 30 sec.

I’ll charge up a couple 30Q’s as that’s the best I have

Ok what?

5900 lumens is nothing like we would expect.

Would be really sad if you got dud 26650s, and the 30Qs get around 8000 lumens.

I have another SP70 that should be here either tomorrow (Fri) or Monday so I can check with those cells.

Sooooo I just noticed one cell has a dent on the negative and the nipple pressed in :confused: I’m guessing this is causing the low numbers. I think Jason had this happen awhile back.

I’ll add some solder and report back. If this is the cause I’ll edit my original comment

Oh I’m relieved.

Good luck on it.

Decided not to solder and use a neodymium magnet but that made no difference.

My tracking updated to show my other SP70 is due tomorrow.

One of my cells also has a dented bottom. It’s a consequence of shipping big cells in series. When the box gets dropped or thrown around, the 2 cells slam into each other. I don’t think it would effect it’s performance. My HD cells pull slightly less amperage than my Black Liitokala’s.

As far as lumens, my L6 with Aspire 4300 measured 5500 lumen at turn on (19.6A) and 5250 at 20 seconds (18.4A).

With black Liitokala it measured 5300 lumen at turn on and 5100 at 20 seconds (17.6A).

This is with my Maukka calibrated TA Lumen Tube. I don’t know how some guys get these big lumen numbers.

I’ll try to measure the SP70 lumens tomorrow.

At the end of the day the SP70 is much better than the Convoy L6 so I’m happy. Purchased 7pcs to sell. Don’t think I’ll be getting anymore L6’s now unless Simon changes the UI.

The 30Q’s only achieved 100 more lumens totaling 6000 at 30 sec

Funtastic gained 1000 lumens by adding spring bypasses. That tells me the factory dual springs might be a bit high in resistance.

Yeah
They aren’t using steel springs, but they could be using the “lowest” conductivity BeCu at 22% IACS, which would be limiting the current quite a bit compared to the C17530 alloy that I use at 38% IACS.

I changed the MOSFET and upgraded to 16 ga wires. And bypassed the springs leaving them dual springs.

Doesn’t that make the spring array super stiff that way?

At least resistance isn’t an issue. :slight_smile:

Mate, did you bypass both dual springs or just the single outer springs? I just bypassed the large outer springs