Leisure batteries are motorhome multifunction batteries that are normally charged by voltage supplies built to run a 12V motorhome, so should not be charged with typical battery chargers. Although using a standard vehicle battery charger may increase the power in your Volkswagen caravan battery in the short term, it is also likely to cause damage to it. Most campervans offer two ways to charge the battery: via the engine-driven alternator when the vehicle is in motion, and from the on-board central charger when on hook-up.