Hi all, long time listener first time caller. I have borrowed my mother in laws avan sportliner cl. The battery has exploded. We didn't get much of a hand over and were running everything off mains. Obviously I need a new battery but do I need to check the charger for faults or could it be that we cooked it by hooking it up to mains. Also is there a switch to alternate between mains and battery? Does anyone have a link to a owners manual? Thanks in advance. "Nice time of year for truck'n"