Hi,
There are folks who are not open minded about voltage and batteries.
There are advantages to both 12 volt and 6 volt formats.
Folks battery choice is a grey area not black and white.
Each camper should examine their needs, and then examine their desires.
Then they should look at their pocket book--and buy what they can afford that comes the closest to meeting their desires--and what meets their absolute needs.
For me that, worked out to be 12 volt jars. For mena, it worked out to be 6 volt jars. (I picked on him because our banks are both a bit larger than average size).