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Discussion Starter · #1 ·
As stated in my previous thread, I picked up my car on Saturday, and it was worth the wait. I sold my c6 in order to get my C7. My C6 was always hooked up to my battery charger when I wasn't driving it. The hook up was simple as the battery was accessible. With this battery hiding, is it possible or necessary to hook up a charger? I do not have the maintainer package.
Thanks.
 

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search "battery" here lots on this..easy to hook up a maintainer, but not needed if you sit less than 3 weeks on the C7....

all the vendors here sell the same ctek maintainer as GM....

try rpidesigns.com
 

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The safest way is to obtain a maintainer as sold by GM, or from the manufacturer of the unit for GM, CTEK. The model is a CTEK 3300 and easiest way to use it is to connect the CTEK with the accessory adapter to outlet in the right rear truck of your Stingray. It remains "live" when the car is off; the outlet in the center consul is not live when the car is off and can not be used. Alternatively there are hot and cold posts both in the engine compartment for use of alligator clips, or lastly, to the battery itself in the compartment on the right in the rear of the trunk. The significant advantage of a maintainer vs a charger is that you cannot overcharge your battery with a maintainer and further it also automatically performs desulphation, which will extend the life of your battery. You can buy the CTEK and adapter reasonably priced from places like Amazon.
 
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Less than 3 weeks, no problem.

If longer, get a battery tender or just unhook the positive cable.
 

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Less than 3 weeks, no problem.

If longer, get a battery tender or just unhook the negative cable.
Or place the car in Transport Mode.
 

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Discussion Starter · #10 ·
Yea guess that looks right. Do I then plug the unit into the wall and can I just leave the hatch loose?
 

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Yea guess that looks right. Do I then plug the unit into the wall and can I just leave the hatch loose?
Close the hatch. Others report no issues with having the cord and a closed hatch.
 

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Not a good thing to do as every time the voltage is disconnected everything that was in temp memory is lost which means
all engine, trannie, on-board smog tests and fuel functions get erased and all controllers have to go through all the relearns processes
All the SMOG tests could take several drive cycles to get into a passed/complete state and best performance will not be seen until
all the adaptive relearns get completed

Using a charger also is not good as it can cook the battery due to higher current loads they put out
Also chargers are known to put out dirty voltage spikes and could harm a controller

A good tender will keep internals of battery clean to give it a longer lifespan and only puts out 1/2 to 1 amps
 

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Not concerned about temp settings,,,,I have disconnected my batt at least 20 times on the c7... Sometimes for days.....

And why does the manual tell you how to do it on page 10-30.....??????

For vehicles without a battery maintainer, see the following information:
Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from
running down.
 

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You may not care but the loss of all the learned values means each time that is done the fuel trims, misfire, knock, smog, sensor tests, timing, idle setting, everything the PCM took time to learn/adapt and adjust for are gone and now the engine can be running too learn more timing pulled to larger knock counts, etc
Same if auto trannie and the TCM then has to learn drive style, shift points, etc
Depending on drive style and use it can take several cold drive cycles for the relearns to be redone and then voltage yanked again and car controllers are more in relearn state then best performance state

Yes in worst case GM says you can do it but not as a normal process and why GM sells a battery tender to be used and not pulling constant voltage source
and of course with no voltage now security and VATs are also dead just making it easy for thief

Not concerned about temp settings,,,,I have disconnected my batt at least 20 times on the c7... Sometimes for days.....

And why does the manual tell you how to do it on page 10-30.....??????

For vehicles without a battery maintainer, see the following information:
Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from
running down.
 

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Sorry , but that's overthinking it....big time.....obviously if you have a power source a maintainer is good, but if not, many pull the batt with no downsides....
 

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Discussion Starter · #19 ·
Perhaps my original question was improperly titled. I did not mean battery "charger." What I meant was my CTEK 3300 maintainer. I assume it's OK to use it as I did with my C6. Right?
 

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Perhaps my original question was improperly titled. I did not mean battery "charger." What I meant was my CTEK 3300 maintainer. I assume it's OK to use it as I did with my C6. Right?
Of course it is, GM even offers it as a factory option and provided the 12V outlet in the trunk to plug it into.

I use a Deltran Battery Tender with their "cigarette lighter" adapter and extension cable simply because I have multiple Battery Tenders, including a 4 bank unit mounted to the wall in my back garage. I crack the passenger window and run the cable through there since the Battery Tender cable is a bit thicker than the CTEK and I don't like the way it pinches between the hatch and fender.
 
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