Join Date: Feb 2006
Location: Mid Norfolk
Thanked 62 Times in 53 Posts
You can have as many batteries as you want but they are heavy and cost money!
One GOOD leisure battery is better than 2 POOR batteries.
To a degree, it depends what you need them for: if you are "off grid" for 4 or more days, without solar panels, other energy sources eg EFOY or driving around, then yes, another battery is useful.
We tend to move on every day or so, often doing 50miles or more, so the leisure battery (not plural!) gets charged during that drive.
If you sit on a site with electric hook-up (usually at a significant cost, especially in UK) then one battery will easily suffice.
Enjoy your new toy - Gordon