Fenix reverse polarity protection, quick & easy

Energie · May 13, 2007

I have added some epoxy blobs (Arctic Alumina, 0,2-0,3 mm thick).
A cutdown toothpick makes nice round blobs.
Now the -contact of the battery can't reach the +contact of the
driver board. It works well.

1. mix a bit of epoxy (isulator)
2. cutdown a toothpick
3. make 3 or 4 blobs (the surface unter the blobs should be rough)
4. blob-mod. ready!

techwg · May 13, 2007

Re: Fenix battery reversal problem fixed

wow they should do this as standard, yes its a ghetto way of doing it however if it saves the light its worth it..

Budman231 · May 13, 2007

Re: Fenix battery reversal problem fixed

Energie that is an amazingly simple and effective solution.! Nice out of the box Safeguard. Reminds me of the P1 squishy donut at the negetive end of the tube for headtwist on/off...

Bud

Kilovolt · May 13, 2007

Re: Fenix reverse polarity protection

Brilliant !!!

BBL · May 13, 2007

Hope those blobs stick well, otherwise they may come lose and stop the body tube from making contact

Energie · May 13, 2007

This worked in several of my Fenix' since month without a problem.
If those blobs are placed correct, they have no contact to the body
or to the + of the battery.

light_emitting_dude · May 13, 2007

Maybe Fenix will adopt this idea.

KuoH · May 13, 2007

An o-ring of the appropriate thickness and diameter should do the trick as well. I could probably cut out an appropriate ring out of discarded plastic packaging for that matter.

KuoH

Handlobraesing · May 13, 2007

Something light makers been doing for a long time and you've just proven it's easily implemented. I say design flaw in the first place.

techwg · May 13, 2007

I second that . . FLAW, however i still love my p2d ce

Energie · May 13, 2007

Handlobraesing,
nothing is perfect.
But I like Fenix lights. I use them every day.

Skibane · May 13, 2007

Re: Fenix reverse polarity protection

Kilovolt said:
Brilliant !!!

That is indeed brilliant - Simple, and yet elegant!

SunnyQueensland · May 13, 2007

Very clever...

Energie · May 14, 2007

Wow!!

"Brilliant" (thanks Kilovolt & Skibane).
"Very clever" (thanks Sunnyqueensland).
I have to print this out and nail it to the refrigerator,
where my wife can read it every day ("..... are you
still playing with your lights? You are enlightened enough!
Get out of your ¶#F@xY l lab......").

bfg9000 · May 14, 2007

Wouldn't work here with a buttonless 14500, since it barely reaches already and adding a magnet would mean no more High mode. But should work just fine with a RCR123...

Julian Holtz · May 14, 2007

Fenix could just punch washers out of some adhesive 0.3mm plastic material, and stick them in. This would be a mass- production compatible solution.

sixfellas · May 14, 2007

Are many Li-ions still buttonless?

KuoH · May 14, 2007

Come to think of it, there are probably all kinds of plastic or latex stickers that one can find at a store and cut to the correct doughnut shape to fit all kinds of lights.

KuoH

Julian Holtz said:
Fenix could just punch washers out of some adhesive 0.3mm plastic material, and stick them in.

KuoH · May 14, 2007

The Ultrafire 14500's I got 6 months ago do have buttons, but are only half as tall and wider than the typical AA cell. The 10440's have virtually no button to speak of, which is a pain when trying to charge them.

KuoH

sixfellas said:
Are many Li-ions still buttonless?

bfg9000 · May 15, 2007

sixfellas said:
Are many Li-ions still buttonless?

Of AW's protected cells, only the 17500 and 17670 appear to have normal sized buttons. That includes the C cells.

The Fenix 2-stage system relies a standard length cell, so it's not the lack of a button that is generally the problem (even the slightest protrusion will touch the flat driver board) but that the overall length of Li-ion cells tends to be all over the map. You could shim it longer but you can't make it shorter.

Fenix reverse polarity protection, quick & easy

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