What battery for a 4 led light? Maxflex or Bflex?

[iggs]

So if you were building a 4 led light what would you use? What battery and what driver?

 

[cytoe]

I'd do 7.4v Li-Ion (something like http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2894)
and a Maxflex with UIB2...should be out soon

 

[iggs]

I've been looking at batteryspace and would a 11.1v Li-Ion do the job with a maxflex?

The forward voltage on 4 led's would be approx 14v and the peak voltage from a 11.1v battery would be 12.6v according to batteryspace so that would work.

I guess it would need to be an 18v ish battery to work with a buck driver like the bflex

 

[chris_m]

I'd do 7.4v Li-Ion (something like http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2894)
and a Maxflex with UIB2...should be out soon

That's exactly what I'm using with my quad Cree (though running UIC )

 

[Brum]

I've been looking at batteryspace and would a 11.1v Li-Ion do the job with a maxflex?

The forward voltage on 4 led's would be approx 14v and the peak voltage from a 11.1v battery would be 12.6v according to batteryspace so that would work.

I guess it would need to be an 18v ish battery to work with a buck driver like the bflex

Seems 100% correct to me!

I'm going to run a Maxflex with 14,4V NiMH on my Penta handlebar light.

 

[Phaethon]

Hi,
i have tested an external laptop battery pack, bought off ebay for $59, with an output of 3.5-17V and 4000mAh li-ion cells , for my edipower 20w led light and it works great so far. Size is about 2 packets of cigarettes. You can find plenty of types listed there.

 

[msxtr]

Hi, with a 7,4 volts battery, works perfectly, I have it checked.

Greetings - Saludos

msxtr

 

[mofiki]

On the 7.4v pack, what kind of run-time did you get?