Fireflies E07 preview

YES! The ring attachment will always beat the clip arms that scratch the light over time and can come off. I’m looking, but 21700 battery tube size is not near as common as 18650:(

Thank God. The ring-style clip is one of the main perks that I like about FW3A. It would be much less appealing to me otherwise.

I’ve had exactly the same experience, but I think I’ve fixed it just now.
Here’s what I’ve done:

  1. Install the clip backwards so that it extends beyond the tailcap. Hold it in place with a thumb so that it doesn’t pop off and pull with an index finger to bend it slightly.
  2. Tied it down with a braided fishing line using a trilene knot.

Yeah, it doesn’t look pretty (though it’s much less noticeable in person than the picture), but it seems to be very strong (for now).
Also, this is my first attempt and I have no experience with “fancy” knots, never had any interest in fishing, so I’m sure it could look better.

Good idea with the fishing line.

FYI: for those like me without knotting skills I’ve found that a simple double-X knot of Trilene can be made super-durable by applying a little super-glue gel to the knot.

Agreed, full-ring would be the way to go. I am very happy that the clip-on was rejected for the FW3A. And I am glad that I did get another clip for my D4, not the first one. I checked my XT2CR again, and the clip is, besides from the color and the holes in it, almost identical to the one of the E07.

Howdy, about ready to purchase an E07. I’ve read most of the thread, have seen the issues and the potential solutions. But some questions to sum up -

- where best to purchase? Fireflies or nealsgadgets or…?

- is there a discount path still valid anywhere?

- planning to get the 6500k emitter, anything I should know?

  • is the best battery option still a (genuine) Samsung 40T, or has something risen above it in testing?
    Thanks for helping out!
    (I also realize Fireflies is on vacation until 2/15.)

When you purchase, definitely pay for expedited dhl shipping. It’s so much faster. Buy your 40T from a reputable “battery dealer.” There is a thread on here with a discount code for all sellers, but you have to request banggoods code.

got rid of the burrs and some scratches...

i need to add a stronger chamfer too i think (45° 1mm ? )

Does anyone know why the Nichia 219B variant of this light seems to have disappeared? It does not appear to be available from anyone any longer. Is this temporary, or has this version simply been permanently withdrawn?
Thanks

I think fireflies ran out of 219Bs.

here's some 21700 battery test results I ran:

You do have to put this into perspective:

  • These tests are done for turn-on only, no indication how the cell droppage works
  • it's a one shot test, no averaging over several runs, etc.
  • amps is measured first, then lumens reading taken
  • amps is taken using a clamp meter with the tailcap removed - stock tail spring is high qual but not bypassed, so lumens may read lower compared to measured amps.

Interesting the 30T got such high amps but didn't deliver based on comparisons to other cells. The 40T is the actual winner, over the 30T. Also interesting the true branded 30T and 40T did notably better than the rest.

@TomE, I think the Samsung 30T was pushing the emitters way too hard.

Maybe, but it's only about ~4 amps per LED, but could be the heat.

M4D M4X Did you already attempt the emitter swap?

Thank you Tom E! This supports my assumption that the LK4000, the Shockli 4000 and the Sofirn 4000 are all made of rewrapped Lishen 2170SA cells. It would be nice to know if these fake 40Ts use this cell, too. So far, I only know about two cells with this ring in the negative pole: Lishen 2170SA and Samsung 48G.

Did you use Vapcell's 21700 5000mAh with 10A or the one that is branded with 15A? The latter one is known to be the Sanyo NCR21700A ("Tesla" cell) and has a significantly recessed positive pole.

Cheers,

Thomas

Isn’t it the LG M50 also has a ring on the bottom?

Puts some credit into my E07 XPL measuring slightly more with the 40T than the 30T.

I see Fireflies have upped the quoted output of the XPL 5000k from 6200 lumens to 6900 lumens.

The Vapcell 5000 I have is 15A marked, and has the annoying great depression on the batt+ end -- pain to charge because even a magnet won't stay in place.

Yea Lux, think you are right. I was hoping the Shockli's, Sofirn's anf LK's were true rewrapped 40T's, but clearly not now. Notice how tight they all test in amps? Chances are good they are the same cell, I'd say.

TomE, fix the mcpcb heat path before u do more testing.

Huh? I'm not familiar with the problem that needs fix'n, and probably won't be doing any more battery testing. I haven't taken my E07 apart yet.

Ohh, u mean the lack of thermal grease? I don't know, is that really true? I'm very confused reading the posts and seeing pics - whether surfaces were cleaned or not. Maybe I missed something? I see pics but not a clear explanation, or some posts but no pics.

My tests above were just at turn on, mainly because of the low temp setting for thermal regulation. Tried resetting it but I guess for 30 sec tests with raising the thermal reg, better take her apart and check the MCPCB...

I don't like posts that keep you guessing - say it or don't mention it - Martin's post with the pic is not clear to me. The pics with clean MCPCB's and clean shelf top is exactly what I would do - clean the surfaces, re-apply good grease before re-assembling. There's nothing odd in those pics.


Post #1362 - pics and comments: https://budgetlightforum.com/t/-/53669/1331

If this is true that they are not using a single drop of thermal grease (??), then that's a pretty bad oversight for such a powerfully driven light. I expect to see this in 1-2 amp cheap budget no name lights (like TESLACOM ), but not a light like this. If they are doing this in an attempt to keep the housing cool, or not heat up super fast, that's even worse.

Tom E, the problem is there is a thin air gap between the MCPCB and the shelf. So the stock thermal compound doesn’t come into contact with the MCPCB.

I fixed mine by making sure my MCPCB is flat (ran it over fine sand paper on a flat surface) and also ran it over the sand paper at a 45 degree angle over all the edges so it sits down into the shelf better (the edges of the shelf are a little rounded).