I decided to buy a battery charger today. Reason being, I have a charging unit in my controller and my battery was showing 12.4 volts on it. Hmm, is the van battery charging the leisure battery enough for my work me thinks. So I popped to Screwfix and bought this http://www.screwfix.com/p/ring-automotive-rcb206-dual-voltage-6a-car-battery-charger-6v-12v/69046 but got this in the box http://www.screwfix.com/p/ring-automotive-12v-8a-car-battery-charger/58809# The battery was back to fully charged in half an hour!!!