Help with battery tender

362 Views 17 Replies 8 Participants Last post by rrgerman, 2 d ago

Subzerox

Discussion Starter · 4 d ago

2

So this came with the car, but the attachment for it was not included; it only has alligator clips and a cigarette lighter port charger. Can someone please link The appropriate attachment so I can buy? Thanks!! The tender is a Lamborghini brand ctek

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Sakura

· #2 · 4 d ago

You need to get a Lamborghini charger (not ctek brand) from dealer. It has matching single plug.

If you must use the ctek, you can clamp those directly to the battery terminals.

thomba

· #3 · 4 d ago

Sakura said:
You need to get a Lamborghini charger (not ctek brand) from dealer. It has matching single plug.

If you must use the ctek, you can clamp those directly to the battery terminals.

That IS a CTEK connector. I use the CTEK extension. The factory charger is just a rebranded CTEK.

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AngelOfMurci

· #4 · 4 d ago

I spliced and soldered the old cable to my CTEK adapter. Zero issues. On a Murci.

Subzerox

Discussion Starter · #5 · 4 d ago

The problem is form what you showed me - my connector that’s attached to the car is the male end and the terminals are flat (like flathead screw driver) not round/cylindrical.

thomba

· #6 · 4 d ago

Subzerox said:
The problem is form what you showed me - my connector that’s attached to the car is the male end and the terminals are flat (like flathead screw driver) not round/cylindrical.

My bad. My Huracan is the flat pins, my Urus is the round ones. Maybe to differentiate lead acid battery from LiPo.

Subzerox

Discussion Starter · #7 · 4 d ago

Yes flat pins - so which connector do I order?

azzurri

· #8 · 4 d ago

Sakura said:
You need to get a Lamborghini charger (not ctek brand) from dealer. It has matching single plug.

If you must use the ctek, you can clamp those directly to the battery terminals.

Do not need the brand charger. The other one will work on this.

Sakura

· #9 · 4 d ago

azzurri said:
Do not need the brand charger. The other one will work on this.

Yea, like I said, if use ctek he can clamp them directly to the terminals. Or buy plug adaptors 🙄

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Subzerox

Discussion Starter · #10 · 3 d ago

What is the adapter called? The ones I see have the round attachments not flat like the ones I need

rockpool

· #11 · 3 d ago

It's just a two-pin plug - buy a new two-pin set from Amazon and replace the ones on your charger and car.

Or ask your dealer for the harness for the charger they gave you and replace this odd thing on the car with that. You have a mismatched set.

rrgerman

· #12 · 3 d ago

I would just get rid of that Frankenstein cable and get this and call it a day https://www.amazon.com/CTEK-56-382-...2374&sprefix=ctek+battery+cabl,aps,132&sr=8-8

now.. what in the hell is this for?

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azzurri

· #13 · 3 d ago

rrgerman said:
I would just get rid of that Frankenstein cable and get this and call it a day https://www.amazon.com/CTEK-56-382-...2374&sprefix=ctek+battery+cabl,aps,132&sr=8-8

now.. what in the hell is this for?
View attachment 331456

It’s a grounding point

Blu Bull

· #14 · 3 d ago

rrgerman said:
I would just get rid of that Frankenstein cable and get this and call it a day https://www.amazon.com/CTEK-56-382-Comfort-Indicator-Batteries/dp/B002MT8S7E/ref=sr_1_8?crid=1J0CGQ3QWU50J&keywords=ctek+battery+cable&qid=1685252374&sprefix=ctek+battery+cabl,aps,132&sr=8-8

now.. what in the hell is this for?
View attachment 331456

Agree just get a CTEK before having to start a 3rd thread on this. And yea that is for grounding. I was told that is where I should hook negative from charger to. Used that on my R8 and 3 Huracan's.

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Blu Bull

· #15 · 3 d ago

Also why arent you showing us the charger and connection on that end? Might help to identify what is going on?

rrgerman

· #16 · 3 d ago

azzurri said:
It’s a grounding point

Isn’t that cover a plastic piece? Doesn’t seem to be metal or attached to the frame 🤨

Blu Bull

· #17 · 2 d ago

rrgerman said:
Isn’t that cover a plastic piece? Doesn’t seem to be metal or attached to the frame 🤨

Take a closer look there is a metal washer and I think that screw is also metal. Then that black cable goes to grounding point. Have been using that screw for negative for over 10 years on 4 different cars, charger would not turn on if that wasn't a ground. So much easier than trying to get the negative connecter to battery. Also they say when connectecting to negative you are suppose to use that hex bolt. How are you going to get charger o ring onto it?

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rrgerman

· #18 · 2 d ago

Blu Bull said:
Take a closer look there is a metal washer and I think that screw is also metal. Then that black cable goes to grounding point. Have been using that screw for negative for over 10 years on 4 different cars, charger would not turn on if that wasn't a ground. So much easier than trying to get the negative connecter to battery. Also they say when connectecting to negative you are suppose to use that hex bolt. How are you going to get charger o ring onto it?

Gotcha! I thought (looking at the OP pic) that the cable was from some other device and then they were using the lid as a grounding point! lol... but if the other end of that cable is a grounding point then it makes sense. It would be kind of like an "extension" of a grounding point that's behind the tub.

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