If you try to start your car in the morning, but nothing happens, your Mazda B2000 battery may be dead. Unfortunately, many things can drain a car battery, and you won't realize the problem until it's too late. Once you recognize that you have a dead battery, you should attempt to jump-start it, replace it if necessary and ultimately take your vehicle to a mechanic for a check.Attempt To Jump-StartIf an open door drained your battery overnight, Continue Reading