How many volts in a battery - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > alt.trucks.ford
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 11-28-2005, 16:01   #1 (permalink)
Paul O.
Guest
 
Posts: n/a
How many volts in a battery

How many volts should a healthy charged 12v auto battery read? Thanks.

--
Paul O.
oplholik@gmail.com


  Reply With Quote
Sponsored Links
Advertisement
 
Old 11-28-2005, 17:01   #2 (permalink)
TheSnoMan
Guest
 
Posts: n/a
Re: How many volts in a battery

Paul O. wrote:
> How many volts should a healthy charged 12v auto battery read? Thanks.
>

About 13.2 to 13.6 VDC with no load on it after a fresh charge.

--

-----------------
www.thesnoman.com
  Reply With Quote
Old 11-28-2005, 17:01   #3 (permalink)
Al Bundy
Guest
 
Posts: n/a
Re: How many volts in a battery

A 12V lead acid battery should read 12.6VDC with the top charge burned
off. A small load such as the headlights for 30 seconds will relieve
the top charge.
The true test of the battery, however, is a load test to see how the
voltage holds up under load. A bad battery can measure 12.6V and
immediately drop to nothing when a load is placed upon it.

  Reply With Quote
Old 11-28-2005, 17:01   #4 (permalink)
Paul O.
Guest
 
Posts: n/a
Re: How many volts in a battery


"Al Bundy" <MSfortune@mcpmail.com> wrote in message
news:1133223560.094812.245550@g43g2000cwa.googlegroups.com...
>A 12V lead acid battery should read 12.6VDC with the top charge burned
> off. A small load such as the headlights for 30 seconds will relieve
> the top charge.
> The true test of the battery, however, is a load test to see how the
> voltage holds up under load. A bad battery can measure 12.6V and
> immediately drop to nothing when a load is placed upon it.
>


Ok, thanks guys, shoulda asked this earlier. My truck wouldn't start this
morning, just the racheting sound, or click, click. Put the charger on it
and it wasn't drawing a lot of amps so figured it wasn't dead. Checked with
the volt meter and it showed 12.47 v which I thought was ok. So I thought it
must be something else wrong. Not wanting to buy a new battery when I
thought the old one was ok, I decided to have it towed to the dealer and let
the extended warranty take care of what ever was wrong. Well guess what was
wrong, the battery. My dumb cost me a few bucks.
--
Paul O.
oplholik@gmail.com


  Reply With Quote
Old 11-28-2005, 21:01   #5 (permalink)
David M
Guest
 
Posts: n/a
Re: How many volts in a battery

On Tue, 29 Nov 2005 00:32:05 +0000, Paul O. rearranged some electrons to
form:

>
> "Al Bundy" <MSfortune@mcpmail.com> wrote in message
> news:1133223560.094812.245550@g43g2000cwa.googlegroups.com...
>>A 12V lead acid battery should read 12.6VDC with the top charge burned
>> off. A small load such as the headlights for 30 seconds will relieve
>> the top charge.
>> The true test of the battery, however, is a load test to see how the
>> voltage holds up under load. A bad battery can measure 12.6V and
>> immediately drop to nothing when a load is placed upon it.
>>

>
> Ok, thanks guys, shoulda asked this earlier. My truck wouldn't start this
> morning, just the racheting sound, or click, click. Put the charger on it
> and it wasn't drawing a lot of amps so figured it wasn't dead. Checked with
> the volt meter and it showed 12.47 v which I thought was ok. So I thought it
> must be something else wrong. Not wanting to buy a new battery when I
> thought the old one was ok, I decided to have it towed to the dealer and let
> the extended warranty take care of what ever was wrong. Well guess what was
> wrong, the battery. My dumb cost me a few bucks.


A battery with a defective cell (high resistance) can still read good
voltage with no load on it, but will not provide enough current to turn
the starter.


--
David M (dmacchiarolo)
http://home.triad.rr.com/redsled
T/S 53
sled351 Linux 2.4.18-14 has been up 12 days 31 min

  Reply With Quote
Old 11-29-2005, 08:01   #6 (permalink)
TheSnoMan
Guest
 
Posts: n/a
Re: How many volts in a battery

Al Bundy wrote:
> A 12V lead acid battery should read 12.6VDC with the top charge burned
> off. A small load such as the headlights for 30 seconds will relieve
> the top charge.
> The true test of the battery, however, is a load test to see how the
> voltage holds up under load. A bad battery can measure 12.6V and
> immediately drop to nothing when a load is placed upon it.
>



Not completely true, when they added calcium to the plates years ago, it
raised the fully charged no load voltage some. These modern maintainance
free batteries require a slightly higher charge voltage too than the old
"lead" ones

--

-----------------
www.thesnoman.com
  Reply With Quote
Old 11-29-2005, 08:01   #7 (permalink)
TheSnoMan
Guest
 
Posts: n/a
Re: How many volts in a battery

David M wrote:
> On Tue, 29 Nov 2005 00:32:05 +0000, Paul O. rearranged some electrons to
> form:
>
>
>>"Al Bundy" <MSfortune@mcpmail.com> wrote in message
>>news:1133223560.094812.245550@g43g2000cwa.googlegroups.com...
>>
>>>A 12V lead acid battery should read 12.6VDC with the top charge burned
>>>off. A small load such as the headlights for 30 seconds will relieve
>>>the top charge.
>>>The true test of the battery, however, is a load test to see how the
>>>voltage holds up under load. A bad battery can measure 12.6V and
>>>immediately drop to nothing when a load is placed upon it.
>>>

>>
>>Ok, thanks guys, shoulda asked this earlier. My truck wouldn't start this
>>morning, just the racheting sound, or click, click. Put the charger on it
>>and it wasn't drawing a lot of amps so figured it wasn't dead. Checked with
>>the volt meter and it showed 12.47 v which I thought was ok. So I thought it
>>must be something else wrong. Not wanting to buy a new battery when I
>>thought the old one was ok, I decided to have it towed to the dealer and let
>>the extended warranty take care of what ever was wrong. Well guess what was
>>wrong, the battery. My dumb cost me a few bucks.

>
>
> A battery with a defective cell (high resistance) can still read good
> voltage with no load on it, but will not provide enough current to turn
> the starter.
>
>



Yes good point, if possible check the batttery under load (even blower
and headlights will do in a pinch) and cranking voltage should be around
11 volts give or take

--

-----------------
www.thesnoman.com
  Reply With Quote
Old 11-30-2005, 01:01   #8 (permalink)
nobody
Guest
 
Posts: n/a
Re: How many volts in a battery

Al Bundy wrote:
> A 12V lead acid battery should read 12.6VDC with the top charge burned
> off. A small load such as the headlights for 30 seconds will relieve
> the top charge.
> The true test of the battery, however, is a load test to see how the
> voltage holds up under load. A bad battery can measure 12.6V and
> immediately drop to nothing when a load is placed upon it.
>


Sorry Al; that was true up to the late 50's/ earlier 60's.... not now.
Calcium; antimony and other metals have been added to the lead to
improve capacity and life. That "top charge" pretty much disappeared as
well (you may see about a 0.1v drop depending on condition).

Fully charged voltage is usually considered as 13.8 volts; but can vary
from 13.3 to 14.1(rarely)volts depending on construction.

As you said though; a load test is definitely part of checking a
battery's condition.
  Reply With Quote
Old 11-30-2005, 01:01   #9 (permalink)
nobody
Guest
 
Posts: n/a
Re: How many volts in a battery

David M wrote:
> On Tue, 29 Nov 2005 00:32:05 +0000, Paul O. rearranged some electrons to
> form:
>
>
>>"Al Bundy" <MSfortune@mcpmail.com> wrote in message
>>news:1133223560.094812.245550@g43g2000cwa.googlegroups.com...
>>
>>>A 12V lead acid battery should read 12.6VDC with the top charge burned
>>>off. A small load such as the headlights for 30 seconds will relieve
>>>the top charge.
>>>The true test of the battery, however, is a load test to see how the
>>>voltage holds up under load. A bad battery can measure 12.6V and
>>>immediately drop to nothing when a load is placed upon it.
>>>

>>
>>Ok, thanks guys, shoulda asked this earlier. My truck wouldn't start this
>>morning, just the racheting sound, or click, click. Put the charger on it
>>and it wasn't drawing a lot of amps so figured it wasn't dead. Checked with
>>the volt meter and it showed 12.47 v which I thought was ok. So I thought it
>>must be something else wrong. Not wanting to buy a new battery when I
>>thought the old one was ok, I decided to have it towed to the dealer and let
>>the extended warranty take care of what ever was wrong. Well guess what was
>>wrong, the battery. My dumb cost me a few bucks.

>
>
> A battery with a defective cell (high resistance) can still read good
> voltage with no load on it, but will not provide enough current to turn
> the starter.
>


There is also the opposite problem; a shorted cell. If the battery is
otherwise good and the engine is fairly easy to turn over; 10.4-11
volts will start the engine with no problem (for a while). The battery
will die rapidly as the good cells will be seeing a constant overcharge.


  Reply With Quote
Old 11-30-2005, 07:01   #10 (permalink)
Al Bundy
Guest
 
Posts: n/a
Re: How many volts in a battery

Poster did not ask about charging voltage.
Go check 50 batteries down at Wal-Mart or any place else that has a
supply of charged batteries. None will read anywhere near 13V.
Fact is "top voltage" is not meaningful or usable.
Fact is the poster had 12.47V and a dead battery.

  Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > alt.trucks.ford



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 11:05.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.