Charging dual batteries

[Belchos]

I did a quick search with nothing, but I need to go out before it gets dark and charge my dead batteries. I remember something about disconnecting one battery, but that may have been for testing. /????

They are parallel, so I don't know why I can't charge them both at one time by hooking up the one battery to my charger. BUT, I don't want any disasters, so I am asking for a quick answer by somebody who knows.

Thanks

 

[Bob4x4]

Everything stays connected to charge both at once

 

[Belchos]

Thank you, Bob -- I'm heading for the barn!

 

[dieselfreak5.9]

To just do a quick charge to get it started leaving them paralleled is fine. To properly charge them, you should charge seperately. Reason why is if one has a bad cell, you will actually over charge the good battery which then you will have 2 messed up batteries... . Either way if there is one bad battery, you would want to replace in pairs.

 

[Belchos]

Right. I figured if there was one bad one, it wouldn't matter, because they have to be replaced in pairs anyway. I'm due. The batteries (factory) are eight years old, with nearly 100k miles, in a hot climate!

 

[Crunch]

Right. I figured if there was one bad one, it wouldn't matter, because they have to be replaced in pairs anyway. I'm due. The batteries (factory) are eight years old, with nearly 100k miles, in a hot climate!

I replaced my original batteries late last year. They also lasted 8 years and 180K miles. Funny thing was that the OEM batteries were priced lower than all the other batteries I checked. Since they lasted so long I decided to go with the Mopar batteries as replacements. One surprise I had was finding that the cables suffered some corrosion behind the terminals, which I found odd since the terminals were integrated on to the cables.

 

[Belchos]

You know, the longer these batteries last, and considering how trouble free they've been, I'm starting to think your way. How could you ask for much more? And to find out they are cheaper? That does it for me, unless somebody or some somebodies have contrary information or experience.
I put a little charge on the left battery and started it up -- no problem. Drove 50 miles into town and back with several stops in town -- no problems.

 

[Belchos]

You know, the longer these batteries last, and considering how trouble free they've been, I'm starting to think your way. How could you ask for much more? And to find out they are cheaper? That does it for me, unless somebody or some somebodies have contrary information or experience.

I put a little charge on the left battery and started it up -- no problem. Drove 50 miles into town and back with several stops in town -- no problems.

 

[Crunch]

You know, the longer these batteries last, and considering how trouble free they've been, I'm starting to think your way. How could you ask for much more? And to find out they are cheaper? That does it for me, unless somebody or some somebodies have contrary information or experience.

I put a little charge on the left battery and started it up -- no problem. Drove 50 miles into town and back with several stops in town -- no problems.

Just before I changed mine the truck would start fine on warm mornings, but needed a jump if it was cold. After the jump it would start for the rest of the day. The Mopar batteries, IIRC were $114 each from the dealer, but less if you let them install them (I don't know what they charged for installation). I installed them myself since I had to replace both positive terminals. I think all the other stores I called had the price for replacement batteries in the $120s. The total price for both batteries, after all charges was just under $260, after core charges were refunded to me.

 

[Belchos]

Mine were completely dead. I don't know why. I must have left something on, but ?? If it does it again, I will know now what's going on, and I will hot foot it down and pick up a couple.