Fenix question

ChocolateLab33 · May 17, 2006

:help:

I have a Fenix L1P that hasn't been used much and already needed a new battery. I put a new (regular AA) battery in it and now it seems very dull again. Does anyone know what the problem could be? Light going bad or a bad batch of batteries or something? I put an AA battery in my Maxlite from the same batch and it seems fine. Should I try an AA lithium in it? Help, thanks.

Seth · May 17, 2006

ChocolateLab33 said:
:help:

I have a Fenix L1P that hasn't been used much and already needed a new battery. I put a new (regular AA) battery in it and now it seems very dull again. Does anyone know what the problem could be? Light going bad or a bad batch of batteries or something? I put an AA battery in my Maxlite from the same batch and it seems fine. Should I try an AA lithium in it? Help, thanks.

Hi Choc,

what do you mean with "regular AA"?

Ordinary zinc-carbon "Heavy duty" batteries can´t deliver enough current for a luxeon-flashlight.

Your fenix should run fine on alkalines or NiMh rechargeables, lithium is not necessary.

Seth

ChocolateLab33 · May 17, 2006

Seth said:
Hi Choc,

what do you mean with "regular AA"?

Ordinary zinc-carbon "Heavy duty" batteries can´t deliver enough current for a luxeon-flashlight.

Your fenix should run fine on alkalines or NiMh rechargeables, lithium is not necessary.

Seth

Hi, it's just a Duracell AA battery.

Skyclad01 · May 17, 2006

Ive read that sometimes theres grease on the contacts, so you might try wiping those down.

Long John · May 17, 2006

Hello Choc

And take a look inside the tailcap. Be sure, that the aluminium ring with the 2little holes is fixed. If not, turn it to the right until it's fixed.

And clean the contacts with a contactcleaner.

Best regards

_____
Tom

savumaki · May 17, 2006

You will be amazed at the difference lithium makes; I've used nothing but since I got one of the first L1P.

Karl

JohnK · May 17, 2006

Ditto on Karl's statement.

The Lithium almost seems to turn the L1P into a fully regulated light. Bright, and even, for a long time.

Omega Man · May 17, 2006

JohnK said:
Ditto on Karl's statement.

The Lithium almost seems to turn the L1P into a fully regulated light. Bright, and even, for a long time.

I agree too, pop an alkaline and lithium in a few times back-to-back, you should be able to see. Though now I use a ni-mh, and lithium as the spare.

eebowler · May 20, 2006

Stick the 'dull' battery in the flashlight and make contact with the -ve of the battery and the body. If the flashlight lights up brightly as it should, your tailcap is the problem.

Radio · May 20, 2006

make sure the head and tail are screwed on tightly, they make the path. Loosen and retighten and reseat the switch inside the tail if that doesn't work. Just unscrew it and screw it back in tightly.

Handlobraesing · May 21, 2006

I'm not sure how much power the L1P drives through the LED, but if we assume 1W and 75% booster converter efficiency, its around 1.33W draw. Since battery voltage sags under load, you're probably going to be pulling an amp or more.

Alkaline batteries just do not do well at this much current level. You can use the Energizer E91 lithium or NiMH/NiCd rechargeable batteries. Either are suited for this level of drain.

NewBie · May 21, 2006

Handlobraesing said:
I'm not sure how much power the L1P drives through the LED, but if we assume 1W and 75% booster converter efficiency, its around 1.33W draw. Since battery voltage sags under load, you're probably going to be pulling an amp or more.

Alkaline batteries just do not do well at this much current level. You can use the Energizer E91 lithium or NiMH/NiCd rechargeable batteries. Either are suited for this level of drain.

It falls far short of delivering 1W to the luxeon, and I do believe your efficiency is very optimistic...

ChocolateLab33 · May 22, 2006

Thanks everybody!

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