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Old Dec 25, 2020 | 06:59 AM
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Default battery tender

purchased a ever start battery tender awhile back, went to connect it, red cable on positive black on negative, tender is reading cables crossed, so i put red on negative black on positive, now reading that it is charging? is it still safe to use? or take it back? 2004 corvette

Last edited by Dallasfool; Dec 25, 2020 at 07:00 AM.
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Old Dec 25, 2020 | 08:07 AM
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I would try one other car first - just to be 1000% sure the unit is defective. If so, take it back.

Cheers!
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Old Dec 25, 2020 | 10:20 AM
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If it ain't right take it back.
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Old Dec 25, 2020 | 11:19 AM
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did you hook up the permanent terminal connection? I have an issue with that on my C5 right now. Not sure if it is because i broke the negative ring terminal off and put my own on.

I did it the same as every other c5 I had, positive to the main 12v positive under hood and neg to battery neg.

but it flashes red / green
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Old Dec 25, 2020 | 02:30 PM
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Originally Posted by Dallasfool
purchased a ever start battery tender awhile back, went to connect it, red cable on positive black on negative, tender is reading cables crossed, so i put red on negative black on positive, now reading that it is charging? is it still safe to use? or take it back? 2004 corvette
Take it back, swap it
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Old Dec 25, 2020 | 03:18 PM
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If it does not work properly when connected the way it is supposed to, take it back and get another one.
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Old Jan 3, 2021 | 11:32 AM
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Coming late to the party but if you end up taking the Battery Tender back, I would consider getting a CTEK. Lots of discussion and good debate on the Forum about the Tender vs CTEK. Do a search for detailed info but I believe the CTEK is a “healthier” choice. It is not only state of the art charger but also helps to maintain your battery. Like I said do a Sear h.
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Old Jan 3, 2021 | 12:23 PM
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Coming late to the party but if you end up taking the Battery Tender back, I would consider getting a CTEK. Lots of discussion and good debate on the Forum about the Tender vs CTEK. Do a search for detailed info but I believe the CTEK is a “healthier” choice. It is not only state of the art charger but also helps to maintain your battery. Like I said do a Sear h.
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