Am I asking too much from my batteries? - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-21-2012, 08:07 PM
Member
 

Join Date: Feb 2011
Posts: 71
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Am I asking too much from my batteries?

I replaced both my batteries with 850cc costco batteries. The stickers on them say that they are from March 2012, I bought them last month so I'm as sure as I can be that they are new.

I put them on a smart charger to top them up, 4 hours on the first one, I took them off the truck and charged them in the garage. The first one was at 12.3 volts when it started and was at 12.9 when it ended.

I took the second battery off the truck and it took 5 hours to reach the same voltage.

The first battery is at 12.63 volts now (5 hours later), and from charging the batteries last time I know by morning it will be no higher than 12.5.

I have read that 12.5 is a 50% charge for a battery. Am I expecting too much for my batteries to be above 50% 18 hours after charging without being connected to the truck?

They seem to normalize at 12.3 when both are connected to the truck. That's the minimum Ed at ficmrepair.com has listed for a battery voltage to keep the warranty on the repair I just had done to my ficm, so if the batteries are there now, what happens in a year?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-21-2012, 08:13 PM
Premium Member


 

Join Date: Feb 2006
Location: Sacramento
Posts: 8,492
Thanks: 18
Thanked 140 Times in 121 Posts
Feedback Score: 4 reviews
I've replaced my costco batteries 3 times in the past year. So I'm wondering if maybe they're just not up to being used for a diesel?
Reply With Quote Quick reply to this message
  #3  
Old 04-21-2012, 08:35 PM
Compression Ignition Addict
 

Join Date: Aug 2011
Location: Utah
Posts: 462
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
A good battery shouldnt drop below 12.6 for quite awhile. 5 hours is to short a time for them to drop. I can let my truck sit for days and they will still be 12.6.

Sent from my SGH-T759
Reply With Quote Quick reply to this message
  #4  
Old 04-21-2012, 08:51 PM
Member
 

Join Date: Feb 2011
Posts: 71
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thanks for the quick replies.

Hey Fantom , just wondering if it was a voltage problem that had you returning the batteries?

Ps. Iíve got a white 2005 super cab, glad to see you guys made it out alive, the pictures hit pretty close to home when I saw it was pretty much the same truck I drive, hope you and your dad are doing better.

Phil
Reply With Quote Quick reply to this message
  #5  
Old 04-22-2012, 11:52 AM
N.S.D.Q.

 

Join Date: Oct 2007
Location: Middle VA
Posts: 3,971
Thanks: 9
Thanked 42 Times in 33 Posts
Feedback Score: 3 reviews
I think you must be confusing a standing battery voltage and the voltage when installed in a truck. I run high 13s for battery voltage using a CTS with the motor running.
Reply With Quote Quick reply to this message
  #6  
Old 04-22-2012, 03:33 PM
Member
 

Join Date: Feb 2011
Posts: 71
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Hi HeavyAssault, my batteries are 12.3 with the truck off and 13.5 to 14 volts when it's running. After bench charging my batteries are reading 12.56 off of the truck after sitting all night.

Phil
Reply With Quote Quick reply to this message
  #7  
Old 04-22-2012, 03:36 PM
N.S.D.Q.

 

Join Date: Oct 2007
Location: Middle VA
Posts: 3,971
Thanks: 9
Thanked 42 Times in 33 Posts
Feedback Score: 3 reviews
Quote:
Originally Posted by phil_phil View Post
Hi HeavyAssault, my batteries are 12.3 with the truck off and 13.5 to 14 volts when it's running. After bench charging my batteries are reading 12.56 off of the truck after sitting all night.

Phil
I think everything is just fine.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 08:51 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors