battery problems -Nissan diesel

I agree with Michael about twelve months on auxiliary batteries, but your main start battery today should give you three years. I replace mine from a safety point of view every 2 years regardless of condition and my deep cycle battery every 15 months maximum.

I used to change at 12 months, but finding the newer technology and better brands are giving me 15 months.

Sitting around for two weeks should not be an issue at all with modern batteries.

That is why batteries used as an auxiliary are only given six months warranty.

Do I believe in buying flash labelled fantastic claim batteries - no, there is no way you can justify the prices against life span. I do believe in buying a well branded known source battery, but just normal wet cells designed for the purpose.
For example in our auxiliary batteries presently we are running the Apollo 882 (very bottom of page) These are made by Global Yuasa in Korea and are about $135.00
http://www.apollobatteries.com.au/spec.htm

While I have seen some fantastastic claims for life on lead acid batteries when used in vehicles as auxiliary batteries, I have never ever seen or sighted one of these batteries.

Hi Ozi, Because of my Liemack fridge, i need to run both batteries in parallel, no solenoil, so it doesnt pay me to buy a deep cycle battery as a main starter.( the fridge has an adjustable voltage cutout) I buy two $95 4x4 batteries and as soon as i notice any change in the run time of my fridge. The high charge and discharge destroys them them long before their real due date. The $200 is cheap insurance compared to some of the other related costs in Four wheel driving. Regards Michael

Daffyd,
read your message on 'tetrasodium salt solution' and chatted with 3 chemists, two knew of the product and informed me it will work as you say...as it's 'free radical' chemical make-up drives it, I don't understand the workings however I am going to use it.
Was informed the salt solution is $39 for 5oo mls.
Thanks for the info..........