[M4D deal] 21700 FW3A presale list

hank · 2019-12-23T00:31:58.000Z

Look for a fragment of metal stuck between the tubes or stuck into the anodization layer exposing the aluminum.

It only takes a whisker of anything conductive to cause a false signal.

tekwyzrd · 2019-12-23T03:12:32.000Z

tekwyzrd:

Received mine a few days ago and am trying to solve a problem. Light illuminates after battery is installed and screwed together and with the head and tailcap removed I’m reading a short between the contact points of the inner switch + tube and the outer tube - contact points.

Fixed! Seems to be operating properly now. Quick clean of inner tube and inside of outer tube, inserted inner tube to a point with o-ring seated and very high resistance (55 M ohms) between the tubes, installed the tail cap, and inner + tube to outer reads open on the 60M range.

Even so, I’ll add kapton when I get it.

mortuus · 2019-12-23T09:16:41.000Z

JasonWW:

mortuus:

JasonWW:

mortuus:

shame… not sure why cant make so at least all unprotected fits at least… makes a buy not much want…

What do you mean? All unprotected should fit.

i would need confirmation jason or someone else… i have vapcell 4500mah and those are a bit bigger then 40t for example… doesnt seem they would fit?

I heard one person report that the Vapcell 4500mah was 72mm long.

Martin says the light can accept up to a 71mm cell. So it doesn’t look like that battery will fit.

thanks thats a bummer… should have made the light 2 mm more to give room for even longest batteries imo

tekwyzrd · 2020-01-18T05:42:11.000Z

At this point I am very satisfied with the fw21. The only suggestion I have is a groove at the inner edge of the head end of the outer ground tube for an o-ring to help maintain no-contact space between the outer body ground tube and inner tailswitch + tube. Anodizing may be good for insulation but it’s not perfect.

What size trits fit in the slots?

shirnask · 2020-01-18T07:58:31.000Z

tekwyzrd:

At this point I am very satisfied with the fw21. The only suggestion I have is a groove at the inner edge of the head end of the outer ground tube for an o-ring to help maintain no-contact space between the outer body ground tube and inner tailswitch + tube. Anodizing may be good for insulation but it’s not perfect.

What size trits fit in the slots?

1.5x6mm trits

The_Flashaholic · 2020-01-18T09:37:18.000Z

Just reviewing the FW21 for my channel now, complete fail of a light (Lumintop recommend 10A> unprotected button tops, none fit lol) and Lumintop won’t answer my messages which furthers the misery of this project.

M4D_M4X · 2020-01-18T10:00:26.000Z

where did you get it?

the first batch had a top long tube

The_Flashaholic · 2020-01-18T10:01:54.000Z

Banggood.

M4D_M4X · 2020-01-18T10:07:50.000Z

my inner tube is 80.20mm

my outer tube 75.35mm

long batch

shirnask · 2020-01-18T14:35:43.000Z

Samsung 50E fits well in mine.

donj · 2020-01-18T15:03:43.000Z

Using the supplied 18650 adapter and running a Samsung 30q flat top until I get a 21700 battery. Battery fit and function are fine.

forgot to mention I have the M4DM4X later, shorter version

The_Flashaholic · 2020-01-18T15:00:35.000Z

shirnask:

Samsung 50E fits well in mine.

Lumintop have told me only a 75mm+ protected cell will fit in batch one.

shirnask · 2020-01-18T15:02:32.000Z

That is why I waited for batch two.

JasonWW · 2020-01-18T15:45:03.000Z

Flashaholics:

Lumintop have told me only a 75mm+ protected cell will fit in batch one.

If it was my light, I would simply stretch the tail spring to make it longer. Or maybe swap in a longer spring. Or add a solder blob on to the button top. Easy fix.

The_Flashaholic · 2020-01-18T15:50:46.000Z

JasonWW:

Flashaholics:

Lumintop have told me only a 75mm+ protected cell will fit in batch one.

If it was my light, I would simply stretch the tail spring to make it longer. Or maybe swap in a longer spring. Or add a solder blob on to the button top. Easy fix.

I can do that but, I won’t recommend it in a review

M4D_M4X · 2020-01-18T17:14:20.000Z

how long are your tubes?

The_Flashaholic · 2020-01-19T09:35:38.000Z

M4D M4X:

how long are your tubes?

85mm

M4D_M4X · 2020-01-19T10:45:47.000Z

WTF??

Please send me a picture of the measurement

I need to inform some people about that

mortuus · 2020-01-19T16:43:42.000Z

it says on banggood the current batch does not fit flat tops unprotected like fw3a… so the question is , why did lumintop sent that batch to banggood? kinda useless if normal 21700 unprotected suddenly are too short… this is something u shouldnt have to worry about.

This is a early version of the FW21 that has a longer battery tube than the later production FW21’s have. This version does not support unprotected 21700 batteries as they are too short causing intermittent operation. If you can find high drain protected 21700’s you should be OK. Unprotected 18650’s will work with the supplied adapter though what is the point. Might as well by a FW3A. Wish I had known this before hand.

highzlik · 2020-02-05T14:22:09.000Z

About longer tubes…
I have also first batch from BG and I wrote to Lumintop if I can get shorter second batch tube and they told me that tube is the same on both batches but second one has longer springs.
So they recommend me to swap spring for longer one.
Ive swapped the tail one for spring from led4power and all cells now fit perfectly without rattling and poor contact