I have a '97 Mazda Miata that I have retired from "commuting service" and only drive about once a week, for about 5 miles. I have noticed that the battery dies quite often and find myself having to use a booster pack to jump start it.
Would unplugging the battery when I'm not planning to drive the car help prevent power drain? If so, would I have to unplug both terminals, or would unplugging just the positive one do?
To the best of my knowledge, there is only one active drain on the battery: a factory-installed anti-theft LED blinker that I can't seem to turn off, even though the anti-theft system no longer works.
What are some other practices for preventing battery drain/properly maintaining a charge, short of daily driving?