led more powerfull than ssc p7??

[Marduke]

I'm gonna say that a PROPER P7 light will be more powerful than what you have. Your numbers are rather impossible for how you are driving it, which tells me a proper light will probably be roughly twice as bright.

 

[ergotelis]

I'm gonna say that a PROPER P7 light will be more powerful than what you have. Your numbers are rather impossible for how you are driving it, which tells me a proper light will probably be roughly twice as bright.

I think that smaller batteries have less resistance,that is why i think they can provide such a high current. But in that case, you are taking the risk of an explosion..... A great in output/size flashlight but a great explosion is possible too... :(

 

[Marduke]

I think that smaller batteries have less resistance,that is why i think they can provide such a high current. But in that case, you are taking the risk of an explosion..... A great in output/size flashlight but a great explosion is possible too... :(

The opposite is generally true. Such a small cell under such a high load would sag horribly in voltage. I would expect the voltage to be 3.2-3.5v under that load, DEFINITELY not 4.2v.

 

[John_Galt]

Dude, I'm pretty sure that you are holding the equivalent of a stick of dynamite, with a lit fuse, every time you turn that thing on. (I certainly wouldn't want to be standing next to you when that explodes.)

If you want brighter, you will either have to go with a multi emmiter light, as mentioned above, or GET A LARGER REFLECTOR. You are probably wasting more than 50% of the output of that LED with that tiny reflector.

Also, no offense, and I realize that English may not be your main language, but please try to be a little more grammatical, ok?:whistle:

 

[John_Galt]

its direct drived i measuring current draw to the led, the battery of my ultrafire c3 p7 are reversed because the back of the P7 is internal connected to the + side.
the battey its 14500 protected

stop talk about my great ultafire c3 p7 and lets find the most powerfull led powered with 3.7v

Dude, it looks like you've melted the circuitry and/or power contacts from the combination of supremely overdriven LED, and high voltage. Be carefull with that.:ohgeez::ohgeez::ohgeez::ohgeez::ohgeez::eek::eek::eek::eek::eek:

 

[moviles]

I'm pretty sure that's not a protected cell; you're running it at at least 4C, so it should cut out. If it is a protected cell, the protection circuit has failed, and it's just as dangerous as an unprotected cell. There's a serious risk of explosion or fire while you're holding that little firecracker.

DX, at least, sells some Trustfire cells that are labeled as protected, but actually aren't; I think you may have some of those. DX does warn that they're unprotected, but it could be easily overlooked, and less scrupulous vendors could not notify you at all.

EDIT: I'm not in any way denigrating the awesomeness of the concept of that light, but LiCo is not a suitable chemistry to use. You could do a similar upgrade in a CR123, 18500, or 18650 host, where you could use AW's IMR cells, with a LiMn chemistry that's safe for these discharge rates, but AFAIK there are no 3.7V 14500 cells made with safe high-drain chemistries.

...... my batteries are protected, and protection system works allways, when v battery its < 2.75v after 18 minutes runtime protectiom system cut off ,
if i shotcircuit or overload(5A or more) the battery protection system cutoff too

protected batteries:
you can see bottom of batteries

unprotected batteries:
unprotected, do you see difference?

 

[moviles]

The opposite is generally true. Such a small cell under such a high load would sag horribly in voltage. I would expect the voltage to be 3.2-3.5v under that load, DEFINITELY not 4.2v.

internal resistance of battery: <= 100 milli ohm
the voltage of batrery its > 4v the first 12 min:

the current its 3.5-3A the first 12 minutes

4.2v -----3.5A
4v--------3A
3.7v------2.8a
3.5v------1.7A
3.2v------0.7A
.........stop talk about my great ultrafire c3 p7 ,i use it evrydais since 3 months ,and lets find other leds

 

[mdocod]

I'm very curious about that ultra-fire cell you are using. The performance you are getting from it, in both current and runtime suggest that it is not a LiCo cell.

I'm betting you are using a very low Vf LED though.

-Eric

 

[moviles]

Are you planning on using this higher-power-than-p7 LED in the C3 host? If so, what was your plan for supplying it with 12v?

if i find this higher-power-than-p7 LED (3.7v)i will put it here

http://www.dealextreme.com/details.dx/sku.15969
powered with 18650

power supply for 12 v leds will be 3x14500(20-30W leds) or 3x18650(30-50w leds).... but i want small i have too the tactical hid 24w and i hate it because its too big and not much more powerfull than my ultrafire c3 p7 (1.5x 2x)

tactical hid 24w(too big), aurora p7, jetbeam jet 1 pro v2(i love it:4850 lum-1m), ultrafire c3 p7(i love it too)

 

[ergotelis]

The opposite is generally true. Such a small cell under such a high load would sag horribly in voltage. I would expect the voltage to be 3.2-3.5v under that load, DEFINITELY not 4.2v.

Yes, you are right in that, there is also the voltage drop.
By the time he is getting such a small runtime and high output the numbers seem to be ok. Maybe he bought a very low vf led.

But he still can't understand the danger of his project. It is like holding a bomb and waiting to explode. All of us are taking so many precautions for li-on batteries.Even if these numbers are wrong, i would be afraid to do what he did. This guy is driving it at least 3x max suggested current, not taking in account the heat from the led that goes to the battery.

 

[marschw]

jetbeam jet 1 pro v2(i love it:4850 lum-1m)

Heh, I'm guessing you mean lux?

 

[Marduke]

Yes, you are right in that, there is also the voltage drop.
By the time he is getting such a small runtime and high output the numbers seem to be ok. Maybe he bought a very low vf led.

But he still can't understand the danger of his project. It is like holding a bomb and waiting to explode. All of us are taking so many precautions for li-on batteries.Even if these numbers are wrong, i would be afraid to do what he did. This guy is driving it at least 3x max suggested current, not taking in account the heat from the led that goes to the battery.

I think it's a moot point. There is obviously some barrier here which is preventing the understanding that the P7/MC-E is already the highest power quad die LED, and the project in general (especially the host of choice) is absolutely ludicrous.

Oh well, it's no my hand being blown off here....

 

[moviles]

Heh, I'm guessing you mean lux?

the jetbeam jet 1 pro v2 its the 14500 throw king, 4850 lum -1m world record

 

[moviles]

I think it's a moot point. There is obviously some barrier here which is preventing the understanding that the P7/MC-E is already the highest power quad die LED, and the project in general (especially the host of choice) is absolutely ludicrous.

Oh well, it's no my hand being blown off here....

this led its more powerfull but i need 12v 3xaa (3x14500)
1400 lum-20w

lets find other more powerfull leds

 

[Marduke]

the jetbeam jet 1 pro v2 its the 14500 throw king, 4850 lum -1m world record

"lum" (lumens) does not equal lux. That chart is LUX.

this led its more powerfull but i need 12v 3xaa (3x14500)
1400 lum-20w


lets find other more powerfull leds

:shakehead

Lost cause. I give up. I wish someone else better luck...

 

[marschw]

Lux measures the ammount of light at a particular location; it's not necessarily related to the total ammount of light that comes out of a flashlight. Lumines measures the total ammount of light coming out of a flashlight, and requires expensive equipment (an integrating sphere) to measure. 4850 lumens would be more than most HID searchlights...

 

[ergotelis]

1m throw king with 14500 is regalight edc with hawk snipe head, 15000+ lux

3x14500 for 20watt output is like puting 3 bombs together, waiting for one of the three to explode and then to be followed by the other 2. Or you mean that you would like to find a led that is 20watt and can be powered by single 14500?

 

[Gunner12]

It clearly says 4850 LUX not Lumen.

Lux is intensity. Lumen it total output. Lux is like how high a mountain is, lumen is how much rock is in each mountain.

The Regalight EDS with the turbo head also has over 10,000 LUX, so it throws further then the Jetbeam. It is a production light so it is comparible.

Also you don't seem to realize the dangers of pushing a Li-ion battery that far or the limits of how much heat you can pack into a small size before the LED burns out.

Another thing, the rules say pictures have to be 800x600 or less and rules also say no hotlinking images, which is also what you have done.

 

[Benson]

the jetbeam jet 1 pro v2 its the 14500 throw king, 4850 lum -1m world record

It's lux, not "lum", and pasting what you wrote before doesn't make it any less incorrect.

Why don't you just use 6 14250s or something-- you could get double the voltage, and be no less within the safe operating parameters of the cells

 

[Mjolnir]

I'm pretty sure you would need a 50 watt HID to get 4850 lumens.

What do you "need" a brighter LED for? You will probably not find anything all that much brighter than a P7. Even if it is brighter, your eye will probably not notice the difference easily, and it will not be any more useful. A good P7 light with a real 700+ lumen output should be more than enough to do what you want an LED light to do. Anything brighter and you will have to go to HID (which you already have) or a larger multi multi-die setup. Getting "the brightest light in the smallest package" doesn't seem to be too safe with the size of light you are working with. Putting an even higher output LED in a light that small would make it more dangerous, but not more useful.