Leisure battery smell( rotten eggs) very hot. Removed it to cool down. Haven’t reinstalled it ! We had a new leisurebattery charger installed at habitation check. I’ve searched handbook for reference to L battery charger and can’t find anything? Was this the problem? Could it have overcharged the battery? I’m nervous of having a leisure battery at all now. We only go to sites with electric hook up and the fridge stays cool enough while travelling. We don’t have water on board. Do we really need one?