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Registered
Join Date: Mar 2018
Posts: 364
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Do SCs kill batteries like 964s and 993s?
Just bought my first SC. My other 911s : 964, 993 and 997 all killed my battery within 10 months so I just disconnected the battery between uses. Problem solved. I never cared for battery tenders. Do SCs also kill batteries as well? Because I’ll disconnect the battery on my SC if I need to between drives. Thanks.
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Registered
Join Date: Dec 2006
Location: Northern VA
Posts: 585
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the early SCs - at least mine - 1980 SC Euro spec - the only electrical component to operate with the key off - out - is the clock. I have no computer - components talking to each other in my absence. But if you are going to leave it dormant for 2+ months - disconnect neg term../ just my opinion
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Kim Langley 2012 Carrera / 991.1 80 911SC 97 C230 73 BMW 2002Tii |
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Join Date: Mar 2018
Posts: 364
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Quote:
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Reiver
Join Date: Nov 2011
Posts: 57,378
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Never had an issue...a radio that saves stations...that's it.
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De Oppresso Liber Strength and Honor 5th Legion |
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Join Date: Jan 2013
Location: state of wonder
Posts: 495
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Less thaN $10
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_______________________________________________ 45 yr addiction 1965 356 Coupe, '70 914- POS, '74 911- lightweightFUN, '83 SC Cab- 100%AnalogOpenTop. |
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Quote:
and since I don't even have a radio my little 45Ah VARTA battery (9,8kg) does a perfect job. 2 years now.
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Regards, Flo / 79 SC streetrod - Frankfurt, Germany Instagram: @elvnmisfit |
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'73 911 T Targa
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What's wrong with a battery tender?
I have a Noco on mine. It keeps the batteries topped up which prolongs their life and makes it crank fast for quick starts after hibernation. |
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Join Date: Jan 2013
Location: Australia
Posts: 176
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My '88, 3.2 batteries last between 5-6 years only.
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Merv Porsche 2003 996 Turbo Porsche 1988 911 Carrera |
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Join Date: Jul 2001
Location: Lawrenceville GA 30045
Posts: 7,377
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I've owned my '83 for 20 years as of this May. I've bought 2 batteries - don't recall how long the "original" battery lasted that was with the car when I bought it.
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Mark '83 SC Targa - since 5/5/2001 '06 911 S Aerokit - from 5/2/2016 to 11/14/2018 '11 911 S w/PDK - from 7/2/2021 to ??? |
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SC Battery
I just replaced my ‘82 SC battery after 10 years (and I don’t know how old it was). I replaced my original 2005 e46 M3 battery in 2019.
I use a tender with quick connections, very easy to use, and I do believe it adds years to the battery life. |
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What the ?
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1980 no issues with battery drainage.
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SCWDP 73 1980 SC Harley Davidson Road King 9/11/01 FDNY/343 Never Forget! |
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Wildman Emeritus
Join Date: Feb 2003
Location: Chitown Burbs
Posts: 1,875
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My clock will drain my battery to a point that the car won't start in about 4 months without a tender. It will turn over briefly but that's it until I charge the battery. QAD tender has solved that issue and made for a Spring smile when I can just get in and take that first drive with no mucking about.
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Mike Andrew 1980 SCWDP 2024 Suby Forester 2018 BMW X1- Wife's 2000 Boxter - Sold |
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Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
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If you hook an ammeter into the system with the ignition off, you can see the clock tick - the solenoid pulling the spring tight again. Not much current, though.
Still, batteries self discharge, so a tender is a good idea, and probably better than a disconnect. |
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Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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Porsche made battery-killing cars? Hmmm. Maybe an electrical, charging, storage or voodoo issue.
Sherwood |
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Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,736
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My 1979 SC's Bosch brand battery lasted about 12 years. No battery tender/charging system, it was just there when I needed it.
I replaced it with the correct sized battery from Supercheap Auto and it died 8 months later. They got a bit snarly when I pointed out to them it had a three year guarantee and please replace it. Haha, after a few kind words on my part they replaced it. |
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