Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Engineering/Technical
Engineering/Technical Ask technical questions about cars. Do you know how a car engine works?
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools Search this Thread
Old 09-17-2007, 08:13 PM   #1
MagicRat
Nothing scares me anymore
 
MagicRat's Avatar
 
Join Date: Dec 2003
Location: City of Light
Posts: 10,700
Thanks: 12
Thanked 79 Times in 74 Posts
Rebuilding batteries.

As many of us know, car batteries can go bad because (among other reasons) a layer of sulphate can precipitate out of the acid and coat the lead plates, reducing their effectiveness. Recharging the battery will not help much since the battery cannot produce sufficient cranking power to start a car.

I have come across a company that can "rebuild' such dead batteries by removing the old acid, adding a chemical to remove the sulphate, and refilling it with new acid.

Or maybe they add a chemical to the existing acid......not sure.

Any thoughts on the effectiveness of this process, and any idea on the chemical that's added? (I have killed enought batteries over the years I would like to give this a shot on my own)

(BTW, I thought rebuilding batteries used to mean disassembling them and physically handling/repairing the plates etc......)
MagicRat is offline   Reply With Quote
Old 09-18-2007, 07:05 AM   #2
HeavyJ
AF Regular
 
Join Date: Nov 2005
Location: None
Posts: 110
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Rebuilding batteries.

Read one time that putting a dead, sulphated battery on a low, 2 amp charge for 48-72 hours would "de-sulphate" the plates. It does revive a weak battery, but they still dont last very long, at least it seems that way.
HeavyJ is offline   Reply With Quote
Old 09-18-2007, 07:38 AM   #3
bobss396
AF Enthusiast
 
bobss396's Avatar
 
Join Date: Jul 2004
Location: long island, New York
Posts: 1,347
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to bobss396
Re: Rebuilding batteries.

Years ago big equipment and marine batteries were often rebuilt. The tops were cut off, the guts were removed and replaced. These were extreme duty application batteries, very expensive to buy when new. Bigger truck shops used to have an exchange service for them.

For today's car batteries, they're not worth the effort to attempt to revive a sick one. Plates that are sulphated often have a warp as well, which can lead to a short condition.

Bob
bobss396 is offline   Reply With Quote
Old 09-18-2007, 05:44 PM   #4
curtis73
Professional Ninja Killer
 
curtis73's Avatar
 
Join Date: Nov 2002
Location: Penn Hills, Pennsylvania
Posts: 3,561
Thanks: 0
Thanked 9 Times in 9 Posts
Re: Rebuilding batteries.

That's basically what they do with old batteries anyway, but its a bit more in depth. With old batteries they reclaim the lead and the acid (if the acid is any good) and recycle it into a new case. Of course that involves cleaning and melting the lead into new plates, but you're basically talking about the same thing, just not as thourogh
__________________
Dragging people kicking and screaming into the enlightenment.
curtis73 is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD


Bookmarks
Go Back   Automotive Forums .com Car Chat > Engineering/Technical

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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



All times are GMT -5. The time now is 06:20 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts