Hi Susan,

I have maintained uninteruptible power supplies. Sounds like a deep
discharge battery was recommended.  Regular automotive batteries deliver
large amounts of energy over a short time, DD batteries deliver the same
amount of energy over a longer time (simplified explanation).  The DD
battery is *meant* to be charged & discharged regularly.

Susan Bernavich wrote:
>
> Hi ...i just came back from relacing the main battery in my 83
> Diesel...that went fine..followed advice of list...found an appropriate
> replacement easily...the problem came in when we tested the auxilery and
> it was deader than a doornail...the guy said that i needed a deep
> something and that a regular wouldn't do.....QUESTION:....what kind
> should i get and where can i get it??????  Thanks in advance...I'm in
> Oregon