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Forum Index : Electronics : 1996 SLA bat. ex scrap yard

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domwild
Guru

Joined: 16/12/2005
Location: Australia
Posts: 873
Posted: 07:16am 16 Apr 2009
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Hi,

This SLA batt. showed 11.7V but has a 1996 sticker on it. Is it worthwhile to offer some money for it at the scrap yard? Read on this forum or Fieldlines, that a flooded lead-acid batt. with 10.5V in it can still be resurrected.

What about other SLAs in the yard with 4.5V or slightly higher voltage readings???

Thanks.
Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up.

Winston Churchill
 
Bernie the Bolt

Regular Member

Joined: 26/10/2006
Location: United Kingdom
Posts: 45
Posted: 07:54pm 30 Apr 2009
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Hi Dom, I have no experience with sealed lead acid, but anything over 10.5 v can be partly or fully restored with a pulser, but be warned it can take several months on trickle charge with pulser (desulphater) to do this. I have had some success with ex camper van batteries. but I do not bother with anything that reads less than 10.5 volts initially. (I think this indicates a shorted cell) Sometimes a battery you have good hopes for will suddenly lose voltage whilst undergoing desulphation - again this is due to a shorted cell, this is caused by dendrites (wahtever they are) but I understand a pulser based on the pic log can avoid this (it shorts the battery in ms pulses, wich prevents the dendrite build up)The pulser I use is from enquiries@courtiestown.co.uk
Bernie the Bolt

I'd rather be sailing!
 
domwild
Guru

Joined: 16/12/2005
Location: Australia
Posts: 873
Posted: 06:40am 02 May 2009
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Thanks, Bernie for that. Have followed the desulphator page, which now has moved. Interesting stuff!
Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up.

Winston Churchill
 
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