First off, can you use proper English? Nobody's going to help you if they have to spend 20 minutes trying to figure out what the hell you're saying.
What system are you trying to portablize?
ps some times i might need to check with a multimeter if the volts arint to high other wise i'll have to use kind of a big resistor
You don't want a resistor; you want a switching regulator.
mfw prog was not only right, but 100% so.