997 - battery killer?
#1
Instructor
Thread Starter
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So picked up my 997 last year. Battery was 2 years old. Was dumb enough to leave it while away at the cottage for 2 weeks and came home to a dead battery.
Lesson learned. Was quite a show learning how to rectify that situation.
So new battery end of last year.
My car is a 3 season fairly daily driver. Most if goes is 2 or 3 days without being driven. I do find, however, that if I leave it more than 3 days it's a pretty hard crank.
Parked it Friday morning and knowing it would be a few days, I threw the battery tender on yesterday morning (that's 48 hours) and the charge light stayed on a good 24 hours before it
showed full charge today.
I keep it in a locked garage so I never lock the car which would enable the security features so no real drain that I can think of.
Is this a me problem or an issue with these cars?
Lesson learned. Was quite a show learning how to rectify that situation.
So new battery end of last year.
My car is a 3 season fairly daily driver. Most if goes is 2 or 3 days without being driven. I do find, however, that if I leave it more than 3 days it's a pretty hard crank.
Parked it Friday morning and knowing it would be a few days, I threw the battery tender on yesterday morning (that's 48 hours) and the charge light stayed on a good 24 hours before it
showed full charge today.
I keep it in a locked garage so I never lock the car which would enable the security features so no real drain that I can think of.
Is this a me problem or an issue with these cars?
#2
Rennlist Member
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Hasn’t been my experience with my 2011. If I park it Friday and don’t drive it over the weekend, I would have no worries about it firing right up Monday morning. If I’m out of town for a week or so, I’ll throw the tender on as a precautionary measure but it would likely be ok without it.
#4
Burning Brakes
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Not locking the car will drain the battery
#5
Drifting
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Same here, 997.1 C2S and zero issues after 2 weeks of no use but I do lock it.
#7
Rennlist Member
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#9
Race Car
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Lots of talk about this on the 996TT forum. Some cars have this problem and I personally think there is something happening there.
I can leave my car for weeks (unlocked) and it always fires up.
I can leave my car for weeks (unlocked) and it always fires up.
#11
Instructor
Thread Starter
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Taking it in next week to prepare for winter slumber. Gonna have my mechanic take a good look. No biggie putting the tender on when it’s in the garage but just seems odd. My X5 can sit for weeks and fire up and there’s a ton more electronics running in that thing. Guessing locking it to put it to sleep may help. I know the previous owner so nothing running in the background.
#12
Nordschleife Master
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Taking it in next week to prepare for winter slumber. Gonna have my mechanic take a good look. No biggie putting the tender on when it’s in the garage but just seems odd. My X5 can sit for weeks and fire up and there’s a ton more electronics running in that thing. Guessing locking it to put it to sleep may help. I know the previous owner so nothing running in the background.
#13
Rennlist Member
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Lead acid batteries do not like to deep discharge and going below 85% discharge will reduce the life of a brand new one to maybe a year. If you don't drive a lot and can't trickle charge you might go for an AGM (absorbed glass mat) battery. Also a lead acid but the electrolyte is soaked into a mat. Same problems but a lot less problematic and will hold charge better and not as bitchy to recharge. If you want to solve the problem get a Lithium Ion battery, a lot lighter and those can drain completely and will charge back up quickly in a couple of hours. Still subject to a finite number of cycles but well beyond a lead acid. Look it up.
#15
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I had issues before but that was due to the faulty voltage regulator, then the bad Y cable, then the bad starter, then the bad alternator....lol
but now im good. thank fawk.
Edit: I never lock my car.