Need new batteries . What brand ?

I can assure you that it would be a DC battery........

A true deep cycle battery costs a lot of money.........how much did you pay for it?

Many marine batteries are in fact NOT true deep cycle batteries.

hmm........as I suspected, just checked on the net and your battery is not a deep cycle battery..........just an everyday light truck battery.

Thanks, but how did you work that out ?
I looked at the Exide site and there are light truck N70EX and there are heavy commercial N70EX
You may be right, but before I go back to the guy who sold it to me, exactly how do you know mine is not deep cycle ?

OK. I probably should have done this in the first place. Not sure if anyone is interested but I just rang the Exide 1800 number to get some answers.
He said the N70EX definitely is a deep cycle battery. He said it is dual purpose in that it can also be used for cold cranking. They also have an ED5 which is deep cycle only and comes with a 6 month warranty whereas the N70EX comes with a 2 year warranty. He said they sell the N70EX ‘by the pallet load’ to ARB for use as auxiliary batteries and never have any problems.
One other thing, I had heard from some, that when not going away and therefore not drawing on the auxiliary battery for extended periods that it is a good idea to put a load on the battery occasionally. He said that is not necessary in this application.

It would be the same battery but is suitable for more than one application.........in this case both light truck and also heavy commercial.

Exide lists there deep cycle batteries and yours does not appear.........sorry bro, it was no surprise. Deep cycle batteries are very expensive and my guess is that 99% of people who think they have one........really dont. But have somehow gained the impression that a marine battery is a deep cycle battery.......which it isnt.

How do I know?........easy, I used to make the same mistake and recently required a battery to do a very specific job and the lads at my local parts store put me straight..........the battery I needed in a deep cycle was gunna cost me more than $500,00.

Personally I run a Supercharge 24 Gold series with a 760cca and 160 RC. It is an excellent battery and I couldnt be happier plus not very expensive at about 120.

Just read your reply above. Im sorry but that battery is simply not a true deep cycle battery........lol.

Bottom line is that if your happy then thats all that matters.