Re: Speaking of car batteries

"John Tserkezis" <jt@[EMAIL PROTECTED]
> wrote in message 
news:47cfe121$0$13262$afc38c87@[EMAIL PROTECTED]
> Blue Heeler wrote:
>
>> You imagined it.
>
>> NiFe cells can do the polarity reversal thing under certain conditions,
>> but no NiFe cell has ever been used in a car, and Beaurepaire have
>> *never* made or sold NiFe cells.
>
>  You can actually reverse charge a lead acid.  However, there are
certain 
> stipulations that must be adhered to for this to happen.  Minor things 
> like a specially configured power supply, a lot of time, a bit of water,

> you have to know what you're doing, and lack of a brain.  All at the
same 
> time.
>
>  The more likely reason is he switched the red and black leads (it's
easy 
> to get them wrong, they're only colour-coded) when connecting back into 
> his car.
>
>  Then the retards who didn't believe him at first, tested the battery 
> themselves (and ****ed that up) before apologising.
>
>  They're all in good company it appears.
>
>  But the most likely reason is (as you said) didn't happen in the first 
> place. He's skipping his meds again.
> -- 
> Linux Registered User # 302622
> <http://counter.li.org>

Ok time for a lesson in batteries for all you monkeys...apologies due but 
not expected.


quote from http://www.europulse.com/eng/technology/index.shtml

Another phenomenon in motive power applications is the "dead cell". During
a 
very deep discharge cycle, some plates within a cell will reverse
polarity. 
During recharge these cells must first receive energy to return to a
"zero" 
state, and then begin recharging once proper polarity is achieved. The 
surrounding cells have efficiently recharged, as they did not first have
to 
return to a zero state. However the cells with reversed polarity plates 
depress battery voltage, causing the charger to provide strong current.
The 
effect is severe boiling of the fully
charged cells and potentially mechanical damage to the battery.