One Battery bad= replace BOTH?
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New User
Joined: Feb 2007
Posts: 11
Likes: 0
From: San Angelo, Tx
One Battery bad= replace BOTH?
I've got a 2005 6.0psd
One of my batteries is bad (shows ~10v)
The other one seems fine.
I've been told by several people that I still need to replace BOTH batteries.
Fact or fiction?
Thanks,
One of my batteries is bad (shows ~10v)
The other one seems fine.
I've been told by several people that I still need to replace BOTH batteries.
Fact or fiction?
Thanks,
Logistics Pro
Joined: Feb 2004
Posts: 4,460
Likes: 14
From: The Land Of Time
I would do both,
With all of the FICM issues now a days I would replace both of them no questions asked. You are livivng on barrowed time with the "good" on at best. make the investment and buy a good set of batteries.
Sarge
With all of the FICM issues now a days I would replace both of them no questions asked. You are livivng on barrowed time with the "good" on at best. make the investment and buy a good set of batteries.
Sarge
Lead Driver
Joined: Dec 2006
Posts: 7,093
Likes: 147
From: San Diego, CA
Definitely replace both. If you replace one and the other is going bad, it will overload the good battery and shorten it's life. Best to replace them in pairs. It's more up front but will be better in the long run (longer life out of the batteries and you won't get stranded without enough juice to crank it over).
Just my .02
Just my .02
Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
^^^Like Sarge said change BOTH. The one that "seems good" now will damage your new battery if you were to replace only one. And you also run the chance of your alternator failing too...forcing it to work too hard to keep them both charged.
"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
Likes: 4
From: Mifflin, PA
If you replace just one, the new battery will likely want to charge to a higher voltage than the old one, and when the vehicle is shut off, the old battery will drain the new one down to it's desired level. In addition, as the old battery gets older, it will start to sulfate, thus lowering the voltage it wants to charge to even more, and lowering the overall charge capacity .......And, if you reuse one battery, it's life expectancy is fairly low, so you'll be looking at troubles or replacing another battery in a short time.
Replace them both.
"You cannot invade the mainland United States. There would be a rifle behind each blade of grass."
~ Admiral Isoroku Yamamoto
Replace them both.
"You cannot invade the mainland United States. There would be a rifle behind each blade of grass."
~ Admiral Isoroku Yamamoto
Cargo Master
Joined: Sep 2007
Posts: 3,049
Likes: 1
So, what do you guys consider a "good battery" to buy? I was eyeing up an Optima for the vehicle that I traded for my truck. I've read some good things about them. Anyone have experience with them? Other recommendations?
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Thread Starter
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New User
Joined: Feb 2007
Posts: 11
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From: San Angelo, Tx
Thanks, guys. I'll replace both batteries tomorrow.
I'm planning on buying them from Autozone, because I work all over, and there are autozones all over in case I have to return/replace them.
Yellow top Duralast have 3yr warranty, for ~$110each...
I'm planning on buying them from Autozone, because I work all over, and there are autozones all over in case I have to return/replace them.
Yellow top Duralast have 3yr warranty, for ~$110each...
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Logistics Pro
Joined: Feb 2004
Posts: 4,460
Likes: 14
From: The Land Of Time
I put the Motor Craft prmiums in my truck, they have a 96 or 04 month replacement warranty, 36 month free replacement warranty. I had an Optima in my F-150 and it sucked. Others here have good luck with the Optima...but for the money you will spend on 1 battery I think there are better choices out there...that ofcourse is just my .02
Sarge
Sarge
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
I put in Duralasts 1,000 cranking, 850 cca for $79 ea. from Autozone and yes there are more of them around than Ford dealers or Costco's. They are 3 yr. free replacement and either 7 or 8 yr. pro-rated.
Lead Driver
Joined: Dec 2006
Posts: 7,093
Likes: 147
From: San Diego, CA
I have read about people having issues with them, but I never have. Plus they're sealed and maintenance free! I do a lot of off-roading so that's a definite plus. I know other people use other brands (Motorcraft, Diehard, etc.), but as long as I have good luck with the Optimas I'll stick with them. Worth the extra dough IMHO.
Just my .02
Tuned
Joined: Mar 2007
Posts: 305
Likes: 0
From: Havana Fla
Ive always had good luck with the autozone 1000 amps. had them in any truck I kept long enough to need to replace the stock bat. Now will everyone please quit talking about dead batteries, I had to jump mine off yesterday and have been running scared ever since. LOL
Tuned
Joined: Mar 2007
Posts: 342
Likes: 1
From: South central kansas
Replace both. I had the same issue a while back. I still have the premium care ESP so I took it to the dealer and replaced one on warranty. It took 3 months or so and the truck started cranking slow again. I took it back and the tech told me he should've replaced both but the warranty would have been questionable. He replaced the older one on the ESP warranty and the new one on a parts warranty. The are Motorcraft 850cca's.
Cargo Master
Joined: Jan 2009
Posts: 2,769
Likes: 9
From: Lubbock
I bought both of mine at the same time from autozone and I was told if I have a problem they would warranty both since I bought them at the same time. I've had issues getting warranty b4 with them wanting to do the charge the batt and chk it thing.... Takes 30+ mins to charge and check btw hopefully I won't have problems