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I don't know what vehicle you have but at least Jeep and probably some other manufacturers put some red top Optimas in their new vehicles which were special spec units (read far less than their normal amp hour rating). The red top in my 05 Liberty CRD was discharged completely by a fuzz buster which was left on for a week while the vehicle sat unstarted. After that it wouldn't hold a charge for more than a day. It was only a year and a half old. Most other Jeep diesel owners who frequent one of the other forums I am on have had similar issues with the Jeep spec red top. After a few thousand of those factory installed red tops going bad after only a year or two, it was discovered that by bringing up to charge with a trickle charge only(contrary to conventional AGM wisdom), they would be restored to there previous capacity. Of course, by then, I had bought a new $150.00 Auto zone one with the standard CCA rating. It has not failed me in two years now.

<blockquote data-quote="Nursecosmo" data-source="post: 163852" data-attributes="member: 11142"><p>I don&#039;t know what vehicle you have but at least Jeep and probably some other manufacturers put some red top Optimas in their new vehicles which were special spec units (read far less than their normal amp hour rating). The red top in my 05 Liberty CRD was discharged completely by a fuzz buster which was left on for a week while the vehicle sat unstarted. After that it wouldn&#039;t hold a charge for more than a day. It was only a year and a half old. Most other Jeep diesel owners who frequent one of the other forums I am on have had similar issues with the Jeep spec red top. After a few thousand of those factory installed red tops going bad after only a year or two, it was discovered that by bringing up to charge with a trickle charge only(contrary to conventional AGM wisdom), they would be restored to there previous capacity. Of course, by then, I had bought a new $150.00 Auto zone one with the standard CCA rating. It has not failed me in two years now.</p></blockquote><p></p>

[QUOTE="Nursecosmo, post: 163852, member: 11142"] I don't know what vehicle you have but at least Jeep and probably some other manufacturers put some red top Optimas in their new vehicles which were special spec units (read far less than their normal amp hour rating). The red top in my 05 Liberty CRD was discharged completely by a fuzz buster which was left on for a week while the vehicle sat unstarted. After that it wouldn't hold a charge for more than a day. It was only a year and a half old. Most other Jeep diesel owners who frequent one of the other forums I am on have had similar issues with the Jeep spec red top. After a few thousand of those factory installed red tops going bad after only a year or two, it was discovered that by bringing up to charge with a trickle charge only(contrary to conventional AGM wisdom), they would be restored to there previous capacity. Of course, by then, I had bought a new $150.00 Auto zone one with the standard CCA rating. It has not failed me in two years now. [/QUOTE]

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