Hello all, after my first outing over the weekend I encounter my first problem. I only stayed two nights but on the third morning when I tried to start the van the battery was completely flat. I was using a mains hook up, and have a split charging system installed and all the van electrics worked fine. The attending vw engineer told me it was the opening of the van doors and using the radio that causes the problem as they use far more power than you would think. He advised me to get a smart battery charger to plug into the diagnostic socket in the cab, powered by the 240v supply in the van, once hooked up to the mains. I have had a look online and in the forum, but can only find chargers that charge the leisure battery and not the vehicle battery? Can anyone explain what I need please. Rather a long winded first ever post, i'm sorry about that.