help with battery config..

[rafa_mazali]

hi guys..

i'm building an flash light using a body very looks like a 3d mag... but it's a fake mag..

i will try to use a sst-90 with the driver sold at DX, the driver works with 12v...

what you guys think is the best config for the battery's 3*18650 unprotected running @ 11.1 v? the amps will be enough?

what you guys suggest to me?

thanks for attention and sory for bad english....

 

[Norm]

Moved to Homemade and Modified Flashlights Discussion - Norm

 

[rafa_mazali]

somebody please?

 

[rafa_mazali]

well, i'm thinking about 3* 18650 LiFePo4 what you guys think?

 

[Epsilon]

3* non IMR is possible, but tricky.

to be safe, use IMR cells, then even two cells are enough, but 3 cells is better :).

 

[Morelite]

If it is a 3D host why not use 3 lithium 32650s or 3 26650s? You will have the same voltage but alot more capacity/runtime. Might as well use as much of that space in the battery tube as possible.

 

[rafa_mazali]

yeah i thought about 26650/32650 but it's little bit more expensive and for me hard to find. especially on LiFePo4 chemistry, i think LiFePo4 it's better (what you think). i'm worried about the driver this one http://www.dealextreme.com/p/12v-sst-90-5-mode-memory-circuit-board-for-flashlights-50026 , it will work with the voltage of 3 LiFePo4 ?
thanks

 

[Stephen Wallace]

If the 12v specified refers to the boards maximum input voltage, then three LiCo cells may be pushing it - 12.6v fresh off the charger - though under load, the cells would most likely be below 12v anyway. LiFe cells would fall under 12v even fresh off the charger.