I find that my Boxster battery loses charge very quickly when compared to other cars that I have had, so I connect my Ctek charger/maintainer if I don't use the car for more than 3 days ( I normally use it once a week). Because my car ('04 986, Australian market) can not be charged via the cigarette socket, I have a quick-disconnect cable direct to the battery in the frunk, so I have to leave the frunk lid open. When the lid is down, but not locked, the frunk light is on, so I have disconnected the light. Since I don't really trust battery charging safety, I disconnect the battery if I am going away for a lengthy period of time.
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