Hi Eevo and I’ll lay money that none of the later model VE commodores had a special battery fitted to them just so they could be registered in SA.
Furthermore, there is no such thing as a “SEALED” lead acid battery.
Quite a few battery manufacturers labelled their AGMs as SEALED but they are not and there never has been a “SEALED” lead acid battery for automotive and/or RV use.
I might also add that a number of battery manufacturers are now labelling their AGMs as “SPILL PROOF” instead of calling them a sealed battery.
All lead acid batteries have some form of vent or valve set up to allow them to spew electrolyte in the event of overcharging occurring.
Without a vent, any lead acid battery in such a situation would simply go “BANG”
Folks, there are a lot of myths and half truths posted up in all sorts of places, including Government documentation, as Warren posted the link to. You would think these organisations could get it right, so when people go looking for safety advice, they get accurate info supplied to them.
The reality is that conventional flooded ( wet ) cell batteries have been located in the cabs of vehicles ever since they started fitting batteries to vehicles and there has never been a problem and just to give you another example, there were 25,000,000 VW Beetles made and every one of them had a 6v or 12v flooded ( wet ) cell cranking battery fitted in the cab under the rear seat, and no venting what so ever.
Here is a word of caution if you are considering fitting a battery in the rear of your 4x4.
If the battery is going to be surrounded by a cupboard or shelving, then you MUST make sure that air will naturally and easily circulate around the battery.
A battery can not build up enough hydrogen when simply fitted inside the cab of a vehicle, even in something as small as a VW Beetle, but put the battery in an enclosure, and you have real the potential for a gas build-up to the point where you could have an explosion and unfortunately this does occur.

