New Style 12v Battery? Or Old-Fashioned Malarkey?

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Toolworker

Toolworker

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Has Hyundai stopped using covers on the 12v battery negative terminal?

The dealer replaced my 12v battery, which has been going dead occasionally (more details here).

New and old batteries.webp
The new battery is missing the holes for the cover. The service advisor said this is a new style battery that Hyundai now uses, and the negative terminal doesn't have a cover.

Truth squad, please weigh in here. Thanks!
 
I can confirm that my MY2021 Ultimate, built in August 2020, came with the same battery style as your 'original' battery pic. It had the negative cover.

Cant say if it has changed since.... Good Luck!
 
These both look like maintenance free batteries. This means they never need to have the water added or even checked. They could have put a simple rubber cover over the exposed post but it is the negative post and is grounded anyway. It won't hurt anything. A maintenance free battery is less subject to acid vapors corroding the posts. Sometimes I spray it with this red spray from an automotive store for battery posts to keep it from oxidizing over time. Not necessary.
 
There is no need for a cover on the negative terminal like there is on the positive terminal.


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Recoil45 said:
There is no need for a cover on the negative terminal like there is on the positive terminal.
Click to expand...
The OEM battery cover provided splash protection for these electronics on the negative terminal.

20201226_151642.webp

(The wire coming off the bottom is my BM2, but the other stuff looks like some kind of sensor.)
 
Toolworker said:
The OEM battery cover provided splash protection for these electronics on the negative terminal.


(The wire coming off the bottom is my BM2, but the other stuff looks like some kind of sensor.)
Click to expand...
This (IBS):
https://insideevsforum.com/community/index.php?threads/12v-battery.5090/page-4#post-94640
One could fashion a cover quite easily if concerned, probably a good idea. Be sure to post in modifications and tweaks thread if you decide to;)
 
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Or one could find out whether the correct part number is still the original 37110-2V36, or has changed to the 00275-29000 that Hyundai supplied to the dealer.

(That would be the same Hyundai whose dealer tech support agent said that a graph showing the 12v battery discharging below 9v and going dead was "normal operation." Am I seeing a pattern here?)
 
Although the battery looks like it was chosen by their accountant, if it's actually an Interstate that's not too bad, plus it appears that the electrolyte levels can be checked, which might be needed when charging at 14.6 V.
 
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