How long without a charge?
Safety Car
Joined: Oct 2003
Posts: 3,644
Likes: 13
From: South of Boston MA
Talon90 might chime in with a figure. If I remember what he told my Corvette group recently it's around 27-29 days before the battery needs some attention after just sitting without a charger in place. 
Le Mans Master
Joined: Aug 2000
Posts: 6,486
Likes: 1,659
From: Las Vegas NV
My car sat untouched and without a charger of any kind for a little over 3 weeks (24 days). When I got in to start it again, it fired up immediately as if I had just driven it the day before. No issues whatsoever.
(2006 coupe with a manual transmission)
(2006 coupe with a manual transmission)
Last edited by Kent1999; Oct 27, 2008 at 07:31 PM.
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
Some good luck examples here. I've tried a max of 10 days....that's after my new (less than 3 mos. old) battery went dead in 26 days. After that, I bought a battery maintainer.
IIRC, BG told me not to go longer than 14 days, that my alternator would have great difficulty charging the battery, even at a sustained 1500+ rpms for 30-45 minutes (which is what they recommended). They also recommended a battery maintainer.
IIRC, BG told me not to go longer than 14 days, that my alternator would have great difficulty charging the battery, even at a sustained 1500+ rpms for 30-45 minutes (which is what they recommended). They also recommended a battery maintainer.
Last edited by AORoads; Oct 27, 2008 at 07:48 PM.
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Racer
Joined: Jan 2007
Posts: 259
Likes: 1
From: Sammamish WA
OK it's probably in the manual but Raazor mentioned a reading of 15.5 What is the voltage range that should be showing up?
In the winter's of Washington, I will sometimes go 3-4 weeks without driving and it starts up fine but ....I did buy a tender to keep the Vette and the T-bird battery ready for a call at any time rain or shine (no ice though...tried that once.
In the winter's of Washington, I will sometimes go 3-4 weeks without driving and it starts up fine but ....I did buy a tender to keep the Vette and the T-bird battery ready for a call at any time rain or shine (no ice though...tried that once.
Le Mans Master
Joined: Dec 2005
Posts: 7,753
Likes: 210
From: North Western Connecticut
I'd still like to know WHY there is such a wide variance between cars on this issue! I have in fact gone a solid 6 weeks without any tender and the car fired right up. No issues at all while others say 2 weeks? What could be so different between cars? I have factory battery in mine so that's not why is can sit that long. It's a 3lt optioned car so everything is in it. I have my V1 hooked into the mirror so that doesn't drain anything.
Anyone have any ideas why some cars can sit for 30 and 40 days while others are dead in 2 weeks of less?
Anyone have any ideas why some cars can sit for 30 and 40 days while others are dead in 2 weeks of less?
Pro
Joined: Oct 2005
Posts: 514
Likes: 1
From: Raleigh NC
I'd still like to know WHY there is such a wide variance between cars on this issue! I have in fact gone a solid 6 weeks without any tender and the car fired right up. No issues at all while others say 2 weeks? What could be so different between cars? I have factory battery in mine so that's not why is can sit that long. It's a 3lt optioned car so everything is in it. I have my V1 hooked into the mirror so that doesn't drain anything.
Anyone have any ideas why some cars can sit for 30 and 40 days while others are dead in 2 weeks of less?
Anyone have any ideas why some cars can sit for 30 and 40 days while others are dead in 2 weeks of less?