last march myself and the better half decided to buy a new affinity caravan , after paying a ton of money to be asked , do...you wish to purchase a new battery as it does not come with one. What use it would be without one I said yes. So the kind gentleman who sold us the caravan(.....for a ton of money....) was kind enough to fit it for us before driving our new rig away. When we bought the rig we bought 3 years service along with the van . 2 days ago it went for its first service....shock gasp horror they said the battery was broke, no good, dead.....I said it can not be you guys fitted it when I bought the van . Have you the receipt? No I answered, then the guy came in and said , look take it home see if it charges up if not bring back and we will see what we can do. So I've had it on charge I'm reading 13.4v with no load . How long do I leave it to know if it's holding charge .also how low should it go to know it's still ok or not