What is the best way to store a car for longer perids of time and have it still start? I have a 98 Cobra and want to store it mainly in the winter and not start it for a month or so (mainly when it is nice out). Would just unhooking the negative battery cable work? Is there some kind of inexpensive battery charger that you can plug in that would just put a very small charge on the battery to keep it charged while the battery remains in the car? Thanks for any input.