I've tried searching but the information is proving elusive! I'm just trying to work out a rough runtime for a 2d mag using the KD Q5 drop-in with the 2-4.5 volt boost buck converter. I've found the online calculator and erring on the side of caution @ 2500ma and guessing at 80% converter efficiency that gives a runtime of 2 hours 20 mins. Is this anywhere even close? I'll buy some decent NIMH cells when I get chance, its just that the Duracell are readily available.