Which battery for own lights (3 Cree Q5's)

[thysmeades]

hi guys, need help urgently....

 

I am building my own light (3 Cree Q5) with a bflex driver.

 

What is the best battery to use for this.

 

 

1)http://www.dealextreme.com/details.dx/sku.12821

 

2400mAh 11.1V 15C Rechargeable Lithium Battery Pack (for helicopter actually)

 

OR

 

2)http://www.dealextreme.com/details.dx/sku.5790

 

TrustFire Protected 18650 Lithium Battery (2500mAh 2-Pack Blue) but I would use 4 cells (ie x2 pack x2)

 

 

 

The both work out about the same in price so I would need to know the best performer. Not sure how to work it out...

 

 

 

Thanks

 

Thys

 

[Carbon_Kooi]

Will 11.1V be enough? I doubt it would since you will have a voltage drop over the driver and I'm not sure what the forward voltage of the LED's are, but from what I can remember an 11.1V was not enough...

 

The data sheet says 3.3V@350mA and 3.7V@1A...

Thus between the two options I would go for the 2nd one.

Carbon_Kooi2009-05-05 03:04:07