Quantity or quality, which one?

Ross, I reckon you'll find AGMs are usually heavier than wet cells.

Norm,that was my main concern, years of service, plus an extra 20 a/h's. Thank you all for that. The rest will be easy now....
I've kicked a goal with the links above...they worked .....

What kind of special charger do you need? I find it charges fine with ether my CTEK 15 or my 30 year old 4 amp cheapy

Ross,
They do appear to charge on any charger, but your only way of monitoring this is by measuring voltage (they are sealed so SG is not measurable). So you have no way of knowing whether they are 70% charged or 100% charged.
They need a higher voltage than all other batteries to appreoah fully charged - at least 14.8V which is more than the 14.4 from your Ctek. Your 30year old charger (Arlec?)is unregulated, so it may eventually deliver a high enough voltage, but it won't turn off, so you can overcharge and trash the battery.

The only two chargers I know of at present with a dedicated Calcium battery setting are marketed by Redarc and Projecta. There are two other threads on the forum from the past 2 weeks where RobAck has elaborated on charging Calcium batteries or you can scour the Redarc website for further info.

Cheers
phil

Reduce the size of your pic and it should hopefully load. You already have a signature in place so it should appear.

Cheers Kev

KC, it is very common for people to wrongly assume all "sealed" batteries are safe inside vehicles.
You should be happy with the FullRiver (the postage is a killer though!). Just remember that the 120Ah FullRiver is a 13inch long battery - an inch wider than the common N70size battery, so make sure it fits the space you've got.