Bro, XL 4015 it's Step down converter but we can increase or decrease the voltage as well as amp (current) EG: our DTH adaptor maximum out -put 12.5V amp 1.5 to 2 amp This adaptor 12.5V (DTH) we can increased the voltage to 14v, 14.8 etc... or better go for step up converter XL 6009 here i required maximum current only 3 (amp) ??? And will be good if add subtitle for module model, step up, step down converter, minimum in -put to maximum O/P etc......