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New forum member here with a question about changing the batteries on my 2014 2500 Cummins. I've search this forum and most of the interwebs without finding the answer I'm looking for.

When dealing with a dual battery system, do I need to disconnect both batteries before doing the swap or should I only disconnect one at a time in order to keep a charge on the system and not lose all the stored memory settings (radio, power seat/mirrors, etc)? It would be nice to not have to reprogram everything. I've also read that some newer vehicles have to "re-learn" how you drive if the memory is wiped.

I'm concerned about damaging the electronics in the truck and costing myself a fortune repairing them.
 

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I prefer Odyssey batteries. I've gotten them through internet and with assistance over the phone. Thick virgin lead plates, heavy, leakproof case. I've had them for several years in my RAM 2500, one in my Polaris, and now have a set in our Excursion. They are worth looking at, anyway.


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Any good battery is fine, just buy stock size. Surprises me factory batteries are bad already. Alternator good?
 

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Does not matter, All you have to reset is the clock. Just like unplugging your computer at home. Any good battery is fine, just buy stock size. Surprises me factory batteries are bad already. Alternator good?
The heat in south Texas wreaks havoc on batteries. Apparently, the average life for batteries down here is about 3 years. I hear that hotter areas like Phoenix only get about 2 years out of batteries.
 

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I prefer Odyssey batteries. I've gotten them through internet and with assistance over the phone. Thick virgin lead plates, heavy, leakproof case. I've had them for several years in my RAM 2500, one in my Polaris, and now have a set in our Excursion. They are worth looking at, anyway.


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I had one in my Harley. Very nice battery. Lasts a long time. What size do you have?


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Does not matter, All you have to reset is the clock. Just like unplugging your computer at home. Any good battery is fine, just buy stock size. Surprises me factory batteries are bad already. Alternator good?
Factory batteries are cheapest bidding supplier junk.

And, the clock is not the only thing you have to reset if you disconnect both batteries.
 

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Factory batteries are cheapest bidding supplier junk.



And, the clock is not the only thing you have to reset if you disconnect both batteries.


.....or you could stick a +9 vdc 'Setting Keeper' in the +12 vdc Accessory Outlet before disconnecting both batteries. Note- I've got one but never used it.


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I had one in my Harley. Very nice battery. Lasts a long time. What size do you have?


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I'm going to have to get back to you on this. I kept this kind of info in my 'notsosmart' phone and lost it in a reset. I need to go look....


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Factory batteries are cheapest bidding supplier junk.

And, the clock is not the only thing you have to reset if you disconnect both batteries.
I just disconnected both my batteries a week ago for about 3 hours while I added the audio controls to the steering wheel. The clock is all I had to reset but I only have the Uconnect 5.0 system so none of the real fancy stuff.
 

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I just disconnected both my batteries a week ago for about 3 hours while I added the audio controls to the steering wheel. The clock is all I had to reset but I only have the Uconnect 5.0 system so none of the real fancy stuff.
You must not have had any radio stations preset then.
 

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Recently disconnected both my batteries for a little bit (30min or so) and everything stayed programmed except the clock. Same thing 5.0 system.
 

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AGM is the way to go. Ram used the worst and possible the cheapest battery source for the factory units.
 

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Had one battery go bad under warranty and the dealer replaced the one. I bet if the other one goes bad they suggest replacing both of them now that the warranty is gone.
 
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