Battery tender
Le Mans Master
Joined: Oct 2012
Posts: 6,391
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From: South Dakota
I have been using a Battery Tender Jr. for the past 7 years. Its been flawless. I put it on when I put the car away, and leave it on 24/7 for 3-4 months until spring. Its all you need and they are cheap.
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I'm using the GM one - part number 84020220. However, as E-T mentions, it is made by CTEK, so buying one from a vendor other than the dealer will probably save you some dollars and still have the same quality of a battery tender.
Le Mans Master
Joined: Aug 2015
Posts: 6,884
Likes: 2,884
From: Toronto
I have a battery tender junior for my motorcycle. Has worked awesome for 10 years.
For the vette I use the NOCO Genius G7200. Costs a bit more but while being a tender it's also a charger. Handy to have both.
For the vette I use the NOCO Genius G7200. Costs a bit more but while being a tender it's also a charger. Handy to have both.
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Joined: Aug 2015
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From: SE WI
Here's a link in case anyone wants the GM version. Is there a CTEK version that comes with the 12V plug needed for the C7 rear hatch power port?
https://www.gmpartsxperts.com/oem-pa...iABEgKNJ_D_BwE
https://www.gmpartsxperts.com/oem-pa...iABEgKNJ_D_BwE
Team Owner
Joined: Mar 2001
Posts: 21,325
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Wwith the highly sophisticated electronics found in a C7, I would not trust the cheaper tenders out there. China will deliver a tender without any quality control, andwith the cheapest parts they can find. I would trust a brand name high quality tender where I would be able to contact a representative of the brand name. Here in the US , manufacturers will have a vested interest in their image. If anyone thinks a no name Harbor frieght or eBay tender for 20 dollars is the same thing as one found under a brand name with a warranty and a reputation at a cost of 75 to 100 dollars, is just fooling themself. a defective voltage regulator that would be much easier to find in a 20 dollar tender with no quality control, could cause a 5000 dollar electrical catastrophe with a compromised C7 wire harness.
There are things you should Not buy on the cheap..
Bill
There are things you should Not buy on the cheap..
Bill
Instructor
Joined: Mar 2019
Posts: 115
Likes: 76
From: Houston, TX
Wwith the highly sophisticated electronics found in a C7, I would not trust the cheaper tenders out there. China will deliver a tender without any quality control, andwith the cheapest parts they can find. I would trust a brand name high quality tender where I would be able to contact a representative of the brand name. Here in the US , manufacturers will have a vested interest in their image. If anyone thinks a no name Harbor frieght or eBay tender for 20 dollars is the same thing as one found under a brand name with a warranty and a reputation at a cost of 75 to 100 dollars, is just fooling themself. a defective voltage regulator that would be much easier to find in a 20 dollar tender with no quality control, could cause a 5000 dollar electrical catastrophe with a compromised C7 wire harness.
There are things you should Not buy on the cheap..
Bill
There are things you should Not buy on the cheap..
Bill
Melting Slicks
Joined: Oct 2016
Posts: 3,340
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From: Lehigh Valley PA
I have two of the Battery Tender Plus models and they have worked flawlessly for years:
Team Owner
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
But Ctek has to submit certifications of compliance to GM oversight... I was part of the oversight team at GM.. China can produce high quality parts.. but when no one is looking , then make junk. GM makes the specs and Ctek has to submit monthty SPC certifications. Statistical process control
Team Owner
Joined: Mar 2001
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
All GM parts, AC Delco parts are made with strict compliance oversight.. They risk the loss of their contract with GM . They use a quality control method to insure they are in complaisance with Gm specifications including quality control certs. They take ownership of the quality they produce. Quality control is 1/3 the cost to manufacture, that's why parts that undergo quality control oversight or more costly.
Bill
Bill
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Bill.
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Joined: Sep 2010
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I've got the CTEK multi useage charger from Amazon, and the adapter for the cigarette lighter orifice plug in. Total about $85.00 all told. I alternate it between my RV, and the C7.
I bought two El cheapo tenders from Walmart - like $12.00 each for my Mercedes Benz sedan and whatever else may need it. Cub Cadet tractor and my RV's house batteries.
I bought two El cheapo tenders from Walmart - like $12.00 each for my Mercedes Benz sedan and whatever else may need it. Cub Cadet tractor and my RV's house batteries.