Howdy. 2007 Aurion, still with the original battery. The car has been garaged for 2 weeks whilst I was away. Today it's battery is flat, giving a clack-clack-clack sound at ignition on. Before doing anything else, using a dvm the battery reads 10.95 at the posts. I've checked the cells and 4/6 have low water levels. That's been corrected with a distilled water top-up of each cell. It's now on a float charge with cell caps off and the battery posts remain connected. I intend to continue the charge overnight then take it for a drive tomorrow. Anything further to add from anyone? If this battery is toast, and it's old enough to be, I'm happy enough to stick with the cheaper lead acid. Any suggestions? Car is in eastern 'burbs of Melbourne, close to Ringwood. Cheers