Does anyone know what the best way to run dual batteries in an '05 FX4 is?

 

Buy a Optima Yellow top and a good capacitor....


I'm guessing you are wanting to do this for an audio system?

A yellow top and a good capacitor should do you fine, unless you are doing some serious db dragging....

 

If you are wanting to charge them both off of the alternator, go visit your local camping supply store or motor home shop. They can set you up with an equalizer charging ststem that will not drain one battery off of the other, but rather charge each one equally.

 

Where would you mount a second battery?

 

Modify your air box should be room over there.

In the bed...

Or Upside down under the bed (requires GEL CELL)....


I still want to know what the use is for this second battery........

 

NO CAPACITOR

just run positive to positive negative to negative

it will charge off the other battery, make sure when you put it in its floating at at least 12.5 volts

 

I want to use it to run offroad lights. I have 7 200 watt offroad lights up front. When they are all turned on the battery drains pretty quick. Plus a louder system is always a plus

 

I'd try a good battery first. There is a huge difference between a yellow top and the factory battery or some $60 battery that you buy from wal-mart...



They aren't cheap, but they are the best battery out there.


And as far as NO CAPACITOR goes. They have their uses, they are a storage device!!! Just like a ACCUMULATOR in a hydrualic system they take away the PEAKS and the VALLEYS and IN TURN EXTEND THE LIFE OF THE BATTERY AND REDUCE STRAIN ON THE ALTERNATOR....

 

look into kinetik or powermaster batteries, if you have the money get a single d 3100 (powermaster) or a kinetik 2400 and you wont have to worry about any of that

 

Im running dual kinetic 2400's in series with the equalizer Bucko is reffering to and i love it my onboard air and misc power adapters always have juice when i need it.