after a shakedown trip to the West Country in our Peugeot talisman we awoke to a flat vehicle battery and got jump started by a friendly local. ( cheers mate ! ). Off we went back home with no other prob. Out came the toolbox . It turns out the leisure battery is an old small car battery ( Vauxhall branded, faded or missing labels). Rated at 200a 44ah so I'm off down to euro car parts in the morning to get the biggest flipping battery I can stick under the seat! Question is I always thought that if you flattened the leisure battery the van battery was unaffected am I wrong? I'm looking at 100ah leisure and maybe a new van battery . By the way we were only using one of the ceiling lights for about 4 or 5 hours. Any help would be much appreciated.