Fenix L1+ and L1P v2.0 can use 14500 li-ion

cy · Jan 30, 2006

Fenix stainless L1+ and L1P v2.0 can use 14500 li-ion and AA alk. Fenix L1P 1watt draw 2.7+ amps with 14500 and will quickly kill light.

you may need to add a dap of solder to 2.0 and L1+ board to contact properly with flat top 14500.

all measurements by Fluke 87

L1P v2.0 current draw with AA alk = 783 milliamps
L1P v2.0 current draw with 14500 li-ion = 430 milliamps.

L1+ current draw with AA alk = 809 milliamps
L1+ current draw with 14500 = 483

L1P 1watt current draw with AA alk = 830 milliamps
L1P 1watt current draw with 14500 li-ion = 2783 milliamps.

Christoph · Jan 30, 2006

:huh2: have you checked what current is going to the led with each of these cells?That seems strange for a boost converter.

C :popcorn:

red_robby · Jan 30, 2006

I wonder why there is so much less current going to the board
with the 14500 cell ???, with more then twice the voltage, i'd expect
the current flow to be higher then the alkaline cell...
:thinking:

markdi · Jan 30, 2006

pwm current controller ?

flashlight · Jan 30, 2006

Is the V2.0 L1P the third one on the right in the photo?

cy · Jan 30, 2006

v2.0 is pictured in middle with logo near bezel.

sorry have not tested current to emitter. that would require desoldering lead to emitter, possibly killing board if lead slips off during measurement.

I've been EDC stainless L1+ with 14500 for several months.

L1+ and v2.0 apears to use same board and is different from current production fenix L1-P

v2.0 will mod easily for two stage operation. stainless L1+ will not mod to two stage using std EZ 1/4 watt 5ohm mod due to conductivity of stainless.

from my understanding, very few of v2.0 were shipped. wonder what production numbers were?

14500 li-ion support makes v2.0 and stainless L1+ very desirable indeed.

flashlight · Jan 30, 2006

cy said:
v2.0 is pictured in middle with logo near bezel.

sorry have not tested current to emitter. that would require desoldering lead to emitter, possibly killing board if lead slips off during measurement.

I've been EDC stainless L1+ with 14500 for several months.

L1+ and v2.0 apears to use same board and is different from current production fenix L1-P

v2.0 will mod easily for two stage operation. stainless L1+ will not mod to two stage using std EZ 1/4 watt 5ohm mod due to conductivity of stainless.

from my understanding, very few of v2.0 were shipped. wonder what production numbers were?

14500 li-ion support makes v2.0 and stainless L1+ very desirable indeed.

Thanks cy. Dang, means the one I have is a V1.0.

xochi · Jan 30, 2006

red_robby said:
I wonder why there is so much less current going to the board
with the 14500 cell ???, with more then twice the voltage, i'd expect
the current flow to be higher then the alkaline cell...
:thinking:

Perhaps the L1+ and V 2.0 detect voltage and then bypass the boost. No voltage boost means less draw on the 14500. If that is what is happening I'd guess that the v2.5 is feeding 7+ volts to the LED with a 14500.

heffeme · Jan 31, 2006

Cy, Is the "L1P" the one on the right? Is this also referred to as the v2.5?

Has anybody ever had the head apart to have a look at the electronics in these? I wonder if anybody has any info on the circuitry and the I.C.'s used....

Archangel · Feb 3, 2006

Has anyone found out how much current is going to the LED? 430mA is still a bit much for a Lux I, or is the 350 not as hard-lined as i've gotten the impression?

cratz2 · Feb 9, 2006

Regarding why the board seems to pull less current with the 14500 than with the alkaline... doesn't the fact that the 14500 is 4.2-ish VOLTS play into that? I mean, sort of like figuring out runtime from the specs of a cell, a 4.2V cell that has 2000mAh has more power than a 3.0V cell that has 2000mAh.

Am I WAY off here? Honestly, I have no idea.

Fenix L1+ and L1P v2.0 can use 14500 li-ion

cy

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Christoph

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red_robby

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markdi

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flashlight

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cy

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flashlight

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xochi

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heffeme

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Archangel

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cratz2

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