I purchased my 2005 4-Runner new. It still has the original battery. It has about 55,000 miles on it. My Toyota Dealer says it still has a good charge, but I'm planning a long trip this winter and don't want to be stuck on the highway somewhere with a dead battery. I hate to change it out because it has been the best battery I've ever owned, but I'm a worrier. Any suggestions on what brand/type to buy would be appreciated. Thanks.