Please use the search function. It is apparent from the 6 threads you have opened today, that you have not once used it...Btw if you had done some reading you would realise your question is actually meaningless. :tsk:
It depends on the driver you have. You either want to use 2x li-ions with a buck/liner or one li-ion with a boost.
The output depends on what current you run the diode at and what lens you use.