Why I am not sure. Didn't have it on the ctek but was fine a few days earlier. It was dead flat
. It wouldn't charge from a charger no matter what I tried. Ended up boosting it from wife's car and it charged itself from the alternator?
kinda strange, I will see if it starts in morning again. But why wouldn't it charge from a charger but charge from the alternator.

 

A CTEC is a battery maintainer, not a charger.

https://www.oreillyauto.com/battery-...er-differences

 

Yes I realize that, I tried with a battery charger, actually I tried two.

 

You can need quite a big current (which an alternator readily supplies) to get a really flat battery going - and even then they don't always.

Were your chargers actually supplying 10-20A? I'm suspecting not.

 

Yup had them on 10 amp , nothing. One even had a 70 amp setting which I could get the car so dash lights would come on but on that setting had to turn off after 30 second because charger cables started to smoke and melt. Cables were only #12 to small for 70 amps for any amount of time

 

You'd need 12-24 hours at 10A. Did you try that?

 

In my experiences with Jags is once a battery goes completely flat it is never the same. After you get this one fully recharged if anything weird and strange takes place this summer/fall suspect the battery first.