desertshores
Posts: 1
Joined: Wed Jun 26, 2019 8:23 pm

Re: 12V Battery Replacement Questions

I am responding to some older battery replacement questions because now is the time some of the older Varta AGM batteries will need replacing.

It is a nothing job. Don't fret and try to read too much into it.

First, I am an electrical engineer. The techs at your dealer aren't. They just learn by rote and spout nonsense they have read.

The fact is your dealer hasn't sold enough eGolfs to be proficient at repairing them. They just rely on tech notes from VW and the tech notes are often just cut and pasted from previous nonelectric modes.

If you haven't figured it out by now, dealerships make most of their money on servicing.
They often use the shotgun approach and just replace parts until something is fixed.
Even if they know exactly what is wrong they will often still sell you parts or services you don't need.

Volkwagon eGolfs use 12 volt AGM only. no other type. Ice cars often use different battery types and have microprocessors that monitor the charging current and voltage.
If you replace your battery with one of the same type and current rating no adjustments will be needed.

If you replace your eGolf Varta AGM battery with an AGM replacement, no coding will be needed PERIOD.

I just recently replaced my 6+ yr old Varta AGM with a Walmart:
EverStart Platinum AGM Automotive Battery, Group Size H6 12V, 760 CCA, $169 + tax

It is exactly the same size and form factor of the VARTA. They are amazingly the same and fit exactly. The EverStart battery has a 4yr full replacement and an additional 3 yrs pro-rated guarantee.

This is the first battery I have ever bought (though I haven't had to buy many) that had a 4-year full replacement guarantee. My previous batteries have always had 4 to 7 years pro-rated.

The Everstart has a slightly higher capacity rating of 70 amps vs 68 amps for the Varta.
This capacity is within ~3% of the Varta. I expect zero charging problems.

I used a lithium Ion 12vdc jumper (pocket size) from Amazon to keep 12 volts applied while I changed the battery.

You probably wouldn't need to do this, but it keeps you from having to reset the clock time, etc.

So far, zero problems, and it fixed the 12-volt battery needs charging warning.

If my battery fails in less than 4 years, I will eat crow and notify the forum.
rjhunter13
Posts: 4
Joined: Thu Jan 21, 2021 9:55 pm

Re: 12V Battery Replacement Questions

I used a lithium Ion 12vdc jumper (pocket size) from Amazon to keep 12 volts applied while I changed the battery.

desertshores: I'm sorry for the dumb question, but would you mind explaining exactly how you used your 12vdc jumper to keep 12 volts applied while you changed the battery? what is the process? Do you attach the jumper before or after you disconnect the battery?
NurStrom
Posts: 60
Joined: Sat Jan 20, 2018 9:01 am
Location: SoCal (Costa Mesa)

Re: 12V Battery Replacement Questions

desertshores wrote: Sat Sep 24, 2022 4:48 pm ...
It is a nothing job. Don't fret and try to read too much into it.
...
If you replace your battery with one of the same type and current rating no adjustments will be needed.

If you replace your eGolf Varta AGM battery with an AGM replacement, no coding will be needed PERIOD.
...
So far, zero problems, and it fixed the 12-volt battery needs charging warning.
...
+1 ... Bought a new Varta and did not require coding. Smooth sailing ... what'er y'all waitn' fer?
f1geek
Posts: 1069
Joined: Fri Jan 23, 2015 1:18 pm
Location: SF Bay Area

Re: 12V Battery Replacement Questions

Where did you buy the Varta?
2017 e-Golf LE, Multi Coat White with Black Vegan Leather interior, purchased in early 2018
2015 e-Golf SEL leased for three years, returned in early 2018

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