CF4.0 with 11.1v battery pack?

[8lade]

Hey guys, I just wanted to ask a quick question.
Will cf4.0 work with this battery pack or will it fry?
http://www.batteryspace.com/index.as...OD&ProdID=2565

cheers

[Donnovan Sunrider]

From the stuff I recall, I think 7.4v is the optimum for CF to be happy.
I don't own one though, so I'm not speaking from experience.

I was looking at this pack as a possibility, but I'm not sure that would work.

[eastern57]

Hey guys, I just wanted to ask a quick question.
Will cf4.0 work with this battery pack or will it fry?
http://www.batteryspace.com/index.as...OD&ProdID=2565

cheers

There's three things here that should be addressed:

- Obviously, yes, 11.1V is the recommended Max that Erv suggests. In other words, anything above that can't be assured, and may end up frying a CF. I personally wouldn't even push it that far - 7.4V is plenty for what I use.

- In addition, Li-Ions generally run higher than the specs: i.e. a 3.6V cell, when fully charged, will actually put out +/- 4.2V; if you do the math, 3 x 4.2V = 12.6V - way to high for me to risk using w/ CF.

- the third point is: 18650s are huge. 3 of them wouldn't fit in MHS, 1.5 sinktube or any other common hilt piece. You would have to find something larger.

[xwingband]

What are you trying to run? For most cases a 7.4V li-ion pack will be fine. Also a 8.4V NiMH pack will get the higher voltage LEDs happy too.

[8lade]

I am going to run a 10w ledengin(the one with the 4 leds in one star)
going to run then 2 on the cf main output and 2 on the clash with the power extender+buckpack or 3 on the main and 1 for the clash.
Haven't tried it yet so I am unsure about the voltage requirements.
Any input on the project would be appreciated!
thanks guys!

[Malaki Skywalker]

The battery pack peeks at 12.6V... so I would NOT use it.

[8lade]

oook
I will go for the 7.4v one!
I have been testing this led and is quite bright I dare say!
it is a green one and I have pushed just one of its 4 leds to 3.2v at 1.5amps...it is not even getting hot!Obviously if I put all 4 one they will but I was thinking how much voltage and amperage could I push through a cf4.0 on 2 or 3 of the led cores connected in series...
Any suggestions?do you think would be possible?
thanks again for all the responses guys I hope I am not a pain in the @ss

[MoonDragn]

Run the leds 2 in parallel and 2 in series. Then you can use 6vs. The CF handles up to 1.5 Amps right? That means the 2 in parallel gets 750 ma each.

[Novastar]

CF could probably TECHNICALLY handle a bit more than 1.5A, but Erv put a cap on its output for a reason. So, yes Moon--CF will output a maximum of 1.5A, and so... you COULD send 1.5A to as many LEDs as you like... but the more you stack on, it "halves" the suggested battery mAh. If four LEDs... that cuts battery runtime to 1/4! D'oh!

Or, you could do what you were saying Moon and split the current for each pair, giving 750mA each LED and I believe that would only be 1/2 the battery runtime (two pairs @ 750mA each).

Either way... the more high current LEDs CF has to run... the quicker it'll be sucking the batteries down!

[Onli-Won Kanomi]

So do I understand correctly you couldnt use that 11v battery with a CF to run THIS?

http://www.ledsupply.com/07007-pb01-18-3.php