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Discussion Starter #1
After 30 days my battery went dead on my c7 Z06. I had the check battery tender connected, lights on it as they should. I used my regular battery charger to start the car and took it to the Chevrolet dealership. I called today to check on it and their mechanic told me it was not made to sit for 30 days even with the battery tender connected. I had to bite my tongue to keep from going off the deep end. Am I mistaken or is this not what the tender was designed for? Also is there any chevrolet documentation that states this?


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Where in the Corvette did you have it plugged into? Only the outlet in the trunk or right rear of the hatch stays hoy. John
 

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You were given incorrect information. With the CTEK connected to the rear accessory outlet (the only one in our C7s that remains live after the car is turned off), you can safely leave you car for extended (read that as months) periods of time. The battery will be kept in excellent shape.
 

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Discussion Starter #4
It is definitely connected in the correct port. This is my third C7. I’m just looking for some support docs from Chevrolet so I can show their mechanic he is mistaken and go about resolving this issue.


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So frustrating when any dealership uses such ridiculous claims such as the car is not meant to sit for 30 days even on a battery tender. All in the attempt to make you go away. When in fact it will normally do just the opposite. Making you more determined to be treated fairly.
I once had a manufacture customer service rep on a completely different vehicle tell me that water in the oil may have been caused by washing the vehicle to much or driving in the rain....Of course i asked where it said the vehicle was not supposed to be used in the rain or "washed" with no response. I think they must have a goal of training these folks to just try and make customers go away by any means possible.
I have had many vehicles over my lifetime including my C7 sit for many months on a correctly installed battery tender with no issue. In addition have gotten many years beyond the usual accepted time period to change batteries. As a matter of fact usually i replace batteries out of an abundance of caution due to age rather than starting issues..
Hope you get it resolved.
 

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Just another case of a mechanic not knowing the facts.

Like many here, I use the GM "Battery Protection Package" option (which is the Corvette logo'd CTEK charger) from mid-November to late March, and have done so since 2014. I never start the car during these months.

The C7 fires-up with a willing roar every Spring, thanks to the CTEK.

Now, it is interesting that you had two green lights on the CTEK and the battery was low or discharged - that's odd, and it makes me wonder if the CTEK may be faulty.
 

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I might add . You didn't mention how old the battery was so perhaps the battery is just to old or has been run down to a point that it can not be brought back. The absurdity of the mechanic's statement lends me to believe that his comment was an opinion regarding how you use your automobile rather than a statement of fact and the battery should be tested or replaced along with a check of the charging system of your vehicle just to confirm no unusual draw of power.
 

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Discussion Starter #8
This battery came with the car, almost 2 years old, car has only 10,000 miles. Battery was checked, rated 565 cca , measured 743 cca , measured volts 12.90, charge time 00:33:37, amp hours 12.9. So I’m still at a loss as to why the problem. Picked up the car today, will see how is does. If problem persists I will take it to another vendor or replace the battery myself. Why I should have to pay for what a warranty should cover is what irritates me.


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The mechanic's comment was absurd. Go somewhere else for service. I do not trust my prized possessions to absurd people.

My car, original battery, went into service in October 2014, and sits from Thanksgiving to Easter on a CTEK, and starts up with gusto Spring from its winter sleep
 
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