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987 Forum Discussion about the Cayman/Boxster variants (2004-2012)

Do I need a battery tender?

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Old Jan 28, 2019 | 11:39 AM
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Default Do I need a battery tender?

How often do I need to drive my Cayman GTS and for how long, to not need a battery tender?

Thanks!
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Old Jan 28, 2019 | 12:04 PM
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There isn't a hard and fast rule, but I'd get one if you don't drive it at least once a week for 20+ minutes. They're inexpensive and make the battery last longer.
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Old Jan 28, 2019 | 02:45 PM
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I try to start and drive mine at least once per week. Anything over that and I'd have it on a tender just in case.
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Old Jan 28, 2019 | 03:05 PM
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Thanks. I certainly intend to use the car once per week and drive over 30 minutes, but I wasn't sure if these cars had batteries with quirks. I don't have access to power where I park, so it make things difficult to run external power.
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Old Jan 28, 2019 | 03:32 PM
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If you haven't already, familiarize yourself with the procedure on how to open your frunk to gain access to the battery should you need a jump start. I'm not sure if it's the same on the 981 as the 987, but if it is you'll want to know the procedure as there is no manual frunk release lever like most cars have.
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Old Jan 28, 2019 | 10:14 PM
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Originally Posted by Code
If you haven't already, familiarize yourself with the procedure on how to open your frunk to gain access to the battery should you need a jump start. I'm not sure if it's the same on the 981 as the 987, but if it is you'll want to know the procedure as there is no manual frunk release lever like most cars have.
I leave the frunk unlatched on all my cars. Just in case.
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Old Jan 29, 2019 | 01:23 PM
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I've learned with other collector cars that if you don't drive it regularly it's bad for the battery. Sitting idle for a couple of weeks at a time will eventually shorten the life of the battery. I keep battery tenders on all my classic cars and my 981. Even though I drive the Boxster fairly often, sometimes it sits for a week or two. Good insurance for keeping the battery in good shape for many years of service.
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Old Jan 29, 2019 | 02:45 PM
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Originally Posted by Jamie140


I leave the frunk unlatched on all my cars. Just in case.
Solid choice.
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Having a battery tender will absolutely extend the life of the battery.
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Old Jan 30, 2019 | 09:55 PM
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Agree with the others - battery tender on non-dd’s (and motorcycles).
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