The fob in car will not let it shut down so that is what killed it. Don't leave a fob in garage on in room next to garage.
z51vett
Doug

 

Thanks for all the info,

I ordered the Ctek 4.3 today (with cig plug).

I jump started the car yesterday.
After that, the battery was reading 12.3 volts or so.
I connected the GM 3000 tender for about
12 hours and it turned green and was reading 13.3V.
I did not lose any of my settings.
I will see how it does tonight.

Going in for my 500 mile oil change on Wednesday,
will have it checked then.

Thanks again,

 

^^^^^^^^^^ you sure about that? i've left mine in for more almost two years without any issues?

 

So I better understand this, are you saying you plug this onto your battery every time you park it in the garage? Do you just plug it into cigarette lighter? And it won't damage the battery? I leave my c7 in the garage without driving it for over a week on numerous occasions with no issues so far. Just wonder if I should buy one and start plugging in? Thanks!

 

bevo_87:

On all my premium sports cars, Jaguar XKR, Porsche 981, & Corvette C7, I have them all connected to a CTEK Smartcharger.

The CTEK comes new with a eyelet cord. The eyelets on each car are connected directly to the battery. The modern connectors on these sports cars all have 10mm battery posts to the side of the main large battery terminal. Then, I have a CTEK Comfort Extension that is an extra 8'. I simply connect the CTEK connector to the CTEK Comfort Extension. Red eyelet to the red positive and black eyelet to the black negative.

On the C7 I do not use the cigarette adapter located in the hatch.

When I pull into the garage bay I simply connect the 2 ends together and the C7, Porsche 981 and the Jaguar XKR are always being charged.
It takes about 5 secs to connect. The ends just snap together.

I never have an electrical issue of any kind.

Here's a link to the CTEK Comfort Extension plug and play connector.


Here's a few photos of the way the Corvette C7 is connected. I use the same connection for my Porsche 981 and Jaguar XKR.

My CTEK of choice is the MUS 4.3 ....8 Step Smartcharger sold at Amazon for $57.00.


It is far superior to the US3300 that GM sells for the C7 at $100 as an option called Battery Protection

 

If you're just going in for the 500 mile oil change the car is almost new and it doesn't matter what the cause was, call the dealership and tell them to send out and install a new battery ASAP.

 

Thanks for the detailed pics! So the actual unit is in the garage and you have the extension cable through a crack in window? Also do you just have the cable from the battery just laying on the hatch carpet? Just trying to get the full visual.

 

Hi bowtie123,

I am sorry to hear about your experience with your battery and would be happy to reach out to the dealership on your behalf. I can let them know about your battery concern and help schedule an appointment for the oil change and battery diagnostic.

If this interests you, please send us your VIN, current mileage, contact information and preferred dealership.

Kind regards,
Kaylee D.
Chevrolet Customer Care

 

I agree, leaving the fob in the proximity of the car should not cause the battery to die. Typically the logic in the module is such that it will go to sleep if there is no activity even if the fob is present. Something else caused the battery to drain. I would take it to the dealer and have them check it out.

 

I've got a different brand of smart charger but I use the same sort of setup. Yes, I just have a short cable with the connector on it peeking out from under the carpet in the hatch area. FYI if you are using the type of tender AKA maintainer that goes in a 12 volt (cigarette lighter) outlet, it has to be the one in the hatch area near the battery. That's the only one that's live when the car is off.

 

The Battery held it's charge overnight.

Can anyone explain the connections on this battery?
The connections are different than the pictures posted
earlier in this thread.

Are the Z-51 battery connections different than a non Z-51?

Thanks for any info.

 

Of course that's the negative on the right, the positive on the left hand has several fused connections. There are two 100 amp circuits and one 350 amp circuit to the engine compartment. There are two unused 100 and one unused 60 amp circuit taps.
I'm not sure but I don't think there is any difference between the base/Z51 connections. The previous picture should be the same, it just has the cover over the positive terminal in place and shows his battery tender connections.

 

Thanks for the info.
Never seen connections like that before.

 

I do not want to derail this thread, but- as a retired Fire Captain--It sure was nice when responding to a garage fire with vehicles inside that on occasion the keys were in the ignition--usually saved those cars-those without went up in flames as steering locked and car in park made it a task not even attempted as fighting the fire was more important.

 

Something people should be aware of is the positive battery terminal does not come off, when you loosen the 10mm bolt on the cable end.

There are 2 plastic catches, one on either side of the battery, released from the top with a flat screwdriver.

Be careful with this one, it looks like its going to be pricy.

 

I bought my Z06 from Georgia and it arrived dead! Did all the crap you did. Battery tender blah blah.

Not sure what was running, but I could hear the faintest motor running.....but let me get to the punch line.

Disconnect the battery. Let it sit for a day or two, reattach and you will immediately notice the interior lights come on. Car will fire right up.

I don't know what caused it other than I think something didn't shut down correctly and drained the battery. But new car, new battery so it was able to recover...,no problem since then.

Good luck!

 

Yes, I keep the CTEK MUS 4.3 plugged into the C7 all the time when not driving. Once I pull the C7 into the garage the CTEK gets connected. It takes about 10 to 15 minutes to bring the battery back up to a full charge and for all the lights on the 8 Step smartcharger to light up. As you can see in the photo below, only 3 lights have lite up on the CTEK unit. I need to see 7 led's light up. Then it's fully charged. The 8th LED only lites up if the C7 has been sitting idle for more than 8 days. Then the unit goes into a float mode.

No. See the attached photos I have added to this thread. It's simply a plug in and connect. The cord comes out of the rear hatch. The hatch closes over the cord without any damage to the rear hatch rubber moulding.

All CTEK units sold come with the eyelet connector cord or an alligator clip cord. I use the eyelets connected to the 10mm battery posts as seen in the photos above. While the 10mm battery post nut is not fully removal, I simply clipped the eyelet open and slipped the eyelet onto the 10mm post and tightened down the nut to secure the connector.

Here's a few more photos to provide how the final connection is made. You can see the connection cord from the battery comes out against the rear hatch wall and my extension is plugged into the connector and runs out of the rear hatch.

Hope these help answer a few more questions.

 

Is it possible that a call to On Star I made, failed to disconnect
and drained the battery?

It appears to be holding a full charge now.

 

Why are these cars requiring a battery charger be hooked up? I can leave my 370Z for days on end and it's fine (and previously my Infinitis). What's eating the charge on Stingrays making this necessary?

 

The new c7 is like all new cars , after about a month, it needs a charge...up untill then, its fine. And after that, you can simply pull the neg lead and lock the car, all the major settings hold, i just did 6 weeks that way.