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To trickle or not to trickle...


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It's good idea to maintain a battery - trickle charges can cook them - during periods of extended storage. I usually don't hook mine up if it's being stored for less than 3 weeks. Also, if it's not a sealed battery, make sure you top off (w/ distilled water) each cell. Good luck :)

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Also keep in mind that the Boxster's central locking/alarm system goes into "Sleep Mode" after 5 days of inactivity. If left longer than that you need to unlock the door by using the key in the door as the remote will not function. Once you have cycled the ignition the remote should regain function. This feature is to conserve power drained from the battery, but often catches people off guard.

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First, battery “maintainers” and “trickle chargers” are different. Battery maintainers are good, trickle chargers are not. A battery maintainer uses electronics to bring the battery up to full charge and then shuts down the current flow until needed; trickle chargers keep charging the battery at a low rate, even when the battery is fully charged. That leads to problems and premature battery failure. Be sure the unit you use is a “maintainer” and not a “trickle charger”.

By all means, use a quality maintainer, it will keep your battery in optimal condition and will also extend its useful life.

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+1 on JFP's advice. Buy a good maintainer (I have a Battery Tender Jr) and you will never have a problem. Funny thing is my 911 has an Optima Red Top with a battery cut switch. When I park it for the winter, the switch is "off" and I don't need to re-energize the battery come spring.

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  • 2 months later...

Do you leave your maintainer attached for the winter or do you use it just periodically? Just bought a brand new battery and a battery maintainer (Canadian Tire brand) but I'm still nervous to leave it attached even for the rest of the winter.

The maintainer cycles on and off a few times an hour judging by the lights, do you see similar with your maintainers?

Any comments on the cigarette lighter adaptor with the maintainer and a Boxster?

Edited by soopster
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Do you leave your maintainer attached for the winter or do you use it just periodically? Just bought a brand new battery and a battery maintainer (Canadian Tire brand) but I'm still nervous to leave it attached even for the rest of the winter.

The maintainer cycles on and off a few times an hour judging by the lights, do you see similar with your maintainers?

Any comments on the cigarette lighter adaptor with the maintainer and a Boxster?

I put my car away around Nov. and it sits until March-April with the battery maintainer plugged into the cig lighter outlet. The car was designed to be stored this way, it will not cause any problems as long as the maintainter you use is a good one....

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Thanks for the advice. The car is plugged in now for the rest of the winter. Only a few more weeks.

It is supposed to hit 55 F tomorrow in the Toronto area and will rain all weekend. Hopefuly that washes away all the snow and salt on roads to make for good spring driving soon.

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