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Old 08-13-2015, 01:53 PM
yoinkster yoinkster is offline
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Join Date: Aug 2015
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Default Battery keeps going flat.

Hey guys,

I've just got back from my chevy garage and had an interesting discussion with them regarding why my battery keeps going flat.

I have a '14 Camaro and the battery has now gone flat twice over a weekend of sitting and doing nothing.

The reason for this, they say, is that there are certain modules on the car that take between 20 minutes and 3 hours to fully shut off and even then, there are some systems that use tiny amounts of battery power at all times.

The problem is that my journey into work is very short, so the alternator doesn't get enough time to recharge what has been wasted over a weekend and then eventually on a sliding scale, the battery runs out over the weekend.

Using easily understandable figures, they say that if an alternator produces 150A and the car's electronics require 100A, the alternator won't provide the full spare 50A to the battery as it will get hot and generally just not be good for it to be essentially force fed that way. It is more likely that the battery is fed, say, 4A. My problem is that with 4A being supplied to the battery, it doesn't charge it enough during my short journeys for it to keep itself afloat. I have no doubt in my mind that if 4A is safe, then 6A (on our example scale) would still be safe. I'd bet that even 10A would be safe but chevy are rightly playing it super safe.

My question to you guys is, is there any way of increasing the amp output from the alternator to the battery? Either via a chevy approved method or via a dirty hack, I don't care. Is it possible?

Thanks for reading,
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Old 08-13-2015, 04:18 PM
zora zora is offline
Join Date: Apr 2012
Posts: 3,336
Default Re: Battery keeps going flat.

the battery is what is running your electronics and everything else. The alternators sole function is to charge the battery.
1. Have they fully charged the battery and then run a load test?
2. Have they hooked up their TechII or laptop based diagnostic tools and watched what happens with the load on the battery after the car is shut off?
3. The load on the battery after everything shuts down should not be more than 50 milliamps, if it is there is a problem with one of the car circuits. Did they test the load after multiple hours?

A milliamp is a thousand of an amp .001. Your battery is about 850 amps when fully charged.
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Old 01-08-2016, 08:48 PM
Suburbanized Suburbanized is offline
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Join Date: Jun 2012
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Posts: 93
Default Re: Battery keeps going flat.

A helpful tool to test your battery is a plug-in cigarette lighter amp reader. They're like a buck from china on eBay. Great cheap test.

Regarding a possible battery drain, does your camaro have heated leather? If so, I know for a fact that you must switch the buttons to off. If you do not, the possibility for a module (heated seats module maybe) to stay on and drain the battery.
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Old 01-25-2016, 06:20 AM
tonymont tonymont is offline
Join Date: Apr 2015
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Posts: 57
Default Re: Battery keeps going flat.

Have you had the alternator checked?
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