Came out this a.m. to go to work, & battery so low the engine would not turn over. No prior problems. Original "special" (as in huge, Canadian winter pkg) battery, but of course the car just recently passed the 50,000 mile warranty drop dead line. Dealer 100+ miles away. I plan to disconnect the battery cables, buy a charger, and slow charge it for a couple days, then head for the dealer, who has graciously allowed me an appointment next Tuesday. Any suggestions for what/where to simplify diagnoses in the meantime? Any caveats, other than trying to remember where I put the radio antitheft code? Thanks