At what point should I invest in dual batteries or/and a high output alternator.

[OscarMike2.0]

I ran dual batteries in the TJ for quite some time.  Never needed it.  Good insurance, sure, worth it, I doubt it.  If your out with others most of the time, you have a spare battery...

JHMO

Yeah Im looking for the insurance since my jeep is my DD.

[OscarMike2.0]

There isn't a need. In my ultra 4 race car I'm only designed for 1 battery, but will have a better alternator. That's designed in case it's rolled over I can get it back over without it being dead.

Yes but your ultra 4 race car doesn't have anywhere near the same amount of accesories as my jeep..

[DOUG]

There used to be. .. it was one of the upgrades to the Rubicon.

[OscarMike2.0]

There used to be. .. it was one of the upgrades to the Rubicon.

All I know is that there is no difference in the alternators for my year 2013 because I also thought at first there was a difference between the two and called my dealer to see about it and was informed there was no difference.

[Mortalis5509]

There isn't a need. In my ultra 4 race car I'm only designed for 1 battery, but will have a better alternator. That's designed in case it's rolled over I can get it back over without it being dead.

Yes but your ultra 4 race car doesn't have anywhere near the same amount of accesories as my jeep..

It runs 2 radiator fans, oil cooler fan, trans cooler fan, fuel pumps that have to pump up to an equivalent of 900 hp, communications, future gps, engine, lights when necessary, and a lot of winching when necessary. It runs a descent amount.

I think you would be better served with an AMG battery.

[OscarMike2.0]

There isn't a need. In my ultra 4 race car I'm only designed for 1 battery, but will have a better alternator. That's designed in case it's rolled over I can get it back over without it being dead.

Yes but your ultra 4 race car doesn't have anywhere near the same amount of accesories as my jeep..

It runs 2 radiator fans, oil cooler fan, trans cooler fan, fuel pumps that have to pump up to an equivalent of 900 hp, communications, future gps, engine, lights when necessary, and a lot of winching when necessary. It runs a descent amount.

I think you would be better served with an AMG battery.

Well my bad I had the wrong understanding of an ultra 4 race car. I have considered the sears die hard and might just end up doing that and seeing how it works out.

[Mortalis5509]

There isn't a need. In my ultra 4 race car I'm only designed for 1 battery, but will have a better alternator. That's designed in case it's rolled over I can get it back over without it being dead.

Yes but your ultra 4 race car doesn't have anywhere near the same amount of accesories as my jeep..

It runs 2 radiator fans, oil cooler fan, trans cooler fan, fuel pumps that have to pump up to an equivalent of 900 hp, communications, future gps, engine, lights when necessary, and a lot of winching when necessary. It runs a descent amount.

I think you would be better served with an AMG battery.

Well my bad I had the wrong understanding of an ultra 4 race car. I have considered the sears die hard and might just end up doing that and seeing how it works out.

I have a sears in my tj and that's what's going into the u4 car as well.

[OscarMike2.0]

There isn't a need. In my ultra 4 race car I'm only designed for 1 battery, but will have a better alternator. That's designed in case it's rolled over I can get it back over without it being dead.

Yes but your ultra 4 race car doesn't have anywhere near the same amount of accesories as my jeep..

It runs 2 radiator fans, oil cooler fan, trans cooler fan, fuel pumps that have to pump up to an equivalent of 900 hp, communications, future gps, engine, lights when necessary, and a lot of winching when necessary. It runs a descent amount.

I think you would be better served with an AMG battery.

Well my bad I had the wrong understanding of an ultra 4 race car. I have considered the sears die hard and might just end up doing that and seeing how it works out.

I have a sears in my tj and that's what's going into the u4 car as well.

Alright good to know. Thanks for the input.

[Bruce]

if you do it, this is it

http://www.nationalluna.com/dualmon.htm

[kvom]

My buggy has 2 batteries along with a Painless automatic switch.  It was built with the 2 battery setup and I added the switcher.  Main advantages are more power for long winch pulls, plus it won't let the battery used for starting run down.  And if the starter battery does go bad you can swap over the secondary to get going.

I doubt I'd bother with a second battery for a JK if the vehicle is not built for one. 

[thetastelingers]

I read somewhere that someone put a Durango alternator on their jeep. It is an exact fit. 160 amp.

Here you go http://www.wranglerforum.com/f282/160-amp-durango-conversion-74732.html

[Lytles_fjc]

Just keep one of these in the jeep.
http://www.gatrailriders.com/GTRForums/index.php?topic=12965.msg216445#msg216445
-Danny