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How long does it take to charge a completely flat car battery?

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Old 02-20-2007, 02:26 PM   #1
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Default How long does it take to charge a completely flat car battery?

Left Boxy's lights on the other day. Dead as a doornail

I currently have it hooked up to the Turbo Pig via jumper cables, Pig is running. How long is this going to take?
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Old 02-20-2007, 02:26 PM   #2
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Default Re: How long does it take to charge a completely flat car battery? (Splat)

like 20 minutes, then go for a long drive.
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Old 02-20-2007, 02:28 PM   #3
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Default Re: How long does it take to charge a completely flat car battery? (Rednas)

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like 20 minutes, then go for a long drive.
Damn. Guess five minutes wasn't enough?

Don't feel like driving, I just need to get Boxy to the point where it will be quick/easy to jump in the morning. I guess I'll let it run for a bit this evening once I get her started.
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Old 02-20-2007, 02:40 PM   #4
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Default Re: How long does it take to charge a completely flat car battery? (Splat)

My Camry just got its 6 month startup. Took a half hour or so hooked up to the Altima to get it to turn over. The cables almost melted, but thats what I get for buying $5 jumpers. lol
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Old 02-20-2007, 03:19 PM   #5
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Default Re: How long does it take to charge a completely flat car battery? (Jonesy69)

Melted? Damn... I've got some nice ones, no issues.

But it's actually a good thing the battery went flat. After 15-20 minutes I tried starting Boxy. Cranked just fine, but wouldn't fire. I let it charge a bit longer just in case, but same result.

I got to checking under the hood, and found that the main 30-amp fuse that feeds, er, something related to the engine running was loose in its mount. So it was just a matter of time before it would have vibrated loose and left me stuck in who knows what kind of situation.

Secured the fuse and she fired right up
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Old 02-20-2007, 03:36 PM   #6
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Default Re: How long does it take to charge a completely flat car battery? (Splat)

Yeah -- usually a car with cable on it shoudl start toot sweet! (30 seconds).

(as my Miata did Thursday when I left the headlights "up" during a snow/ice storm -- thinking it would keep them from freezing closed, but really just allowing enough snice to get into the bucket to keep them from going down and causing the down motor to run all day while it was parked. Did I mention
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Old 02-20-2007, 03:38 PM   #7
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Default Re: How long does it take to charge a completely flat car battery? (Splat)

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Originally Posted by Splat
Left Boxy's lights on the other day. Dead as a doornail

I currently have it hooked up to the Turbo Pig via jumper cables, Pig is running. How long is this going to take?
Are you from england? Battery flat?

It all depends on the type of battery charger. Some batterys will not re-charge. Check the voltage and the amount of fluid in the cells. If it is below 11.5 volts typically it won't hold a charge. If the fluid had gone below the cells, call it quits.
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Old 02-20-2007, 03:39 PM   #8
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Default Re: How long does it take to charge a completely flat car battery? (Rednas)

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like 20 minutes, then go for a long drive.
Driving the car has little effect when it comes to charging a battery back up.
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Old 02-20-2007, 03:42 PM   #9
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Default Re: How long does it take to charge a completely flat car battery? (rico91stang)

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Are you from england? Battery flat?
No, I'm not from England. But for whatever reason, I use that term. I'll call it a dead battery, but say that my battery is flat. Meh.

The battery itself was fine, I just left the lights on and ran it down. It charged fine and allowed me to discover my fuse issue.
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