Battery
Melting Slicks
Joined: Sep 2008
Posts: 3,132
Likes: 799
From: Espanola New Mexico
What did the test for drain or current draw reveal, should be around 25ma. When you say alarm you are referring to the cars orginal equipment alarm or have you installed some after market alarm? Two weeks is pushing it without starting the car or not having a battery tender on it.
Pro
Joined: Mar 2004
Posts: 714
Likes: 104
From: Springfield Ohio
The C5 needs to be plugged in to a battery tender if it's going to sit for more than a week. They all have enough parasitic draw to discharge a battery if left too long. It's a kind of hidden feature.
Racer
Joined: Sep 2019
Posts: 427
Likes: 121
Is the battery a flooded lead acid type battery? Did you happen to check voltage when you could not start car? I hope you got the battery replaced and did not just charge back up. Not sure when juice was all gone but it should be replaced, because it should sulfated up pretty bad within 2 weeks . If still using same battery I would check for open cells and check for dead cells. I use a CTEK US 7002 charger and love it, and I leave it plugged in when not driving 24/7.
Pro
Joined: Mar 2004
Posts: 714
Likes: 104
From: Springfield Ohio
It's not likely the battery is ruined due to a single discharge. Letting a battery go dead, that is drop below 10.5 volts, does take some life out of it but you should be able to recharge it and get a couple more years of service out of it. A dead battery should be recharged with a dedicated battery charger until it's fully charged as soon as possible. Don't rely on the car's alternator to recharge the battery. An alternator is a better maintainer than charger and it would take many miles of driving for the alternator to do the job. Automotive starter batteries don't like to be discharged, so try to drive the car more often or put a quality battery tender on it when it's not in use. Good luck with it.
Last edited by tbrowne; Jan 26, 2020 at 04:28 PM.
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
Without that info, we're basically blind and only very generic advice can be given.Last edited by GCG; Jan 26, 2020 at 12:18 PM.
Burning Brakes
Joined: Jun 2017
Posts: 1,045
Likes: 275
From: Wichita Falls Texas
Yeah, just fully charge it and then put a maintainer on it. I've been buying batteries for trucks, tractors, mowers, forklifts, dozers, backhoes, and motorcycles for many years. After a while you get some experience about batteries. Especially new batteries.
As I said, just give it a full charge then keep it on a good MAINTAINER and it will last quite awhile.
These C5's will suck a battery down quicker than just about anything I've ever owner and they really new a good hot one to run right.
Good luck!
As I said, just give it a full charge then keep it on a good MAINTAINER and it will last quite awhile.
These C5's will suck a battery down quicker than just about anything I've ever owner and they really new a good hot one to run right.
Good luck!
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