2020 MY and before Auxiliary battery replacement

2380 Views 18 Replies 8 Participants Last post by Burdito, 4 d ago

Ayepace

Discussion Starter · 4 mo ago (Edited)

The attached document describes how to replace the small auxiliary battery in the the 2020 and before model years.

If you use a Jaguar Land Rover labeled battery (or Exide EK151 equivalent) then you only need page 4 for a step-by-step instruction list.

The rest of the document is for persons who want to use a less expensive motorcycle/motorsports battery. The Jaguar Land Rover battery is expensive in the US (> $200) compared to the UK (< $100 USD for an EK151). I did this for a total cost of about $150 for parts and tax. (I actually spent > $200 as I explored alternatives for everyone.) The only thing that would cost in the future is a battery and that would be < $100.

Read through the instructions. If you plan to do this, you can be prepared by getting the parts together before your battery fails. Get the replacement battery when it does fail or could fail based on age.

Battery removal time: about 20 minutes if you haven't done it before (excludes waiting time for the car to power down)
Battery install time: about 15 minutes (gravity helps to install the battery

)
Assembling the motorcycle/motorsport battery change: about 1/2 hour if fully prepared

Thank you to @sciencegeek and @dernotte for proof reading and comments.

Reactions: 5

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· #2 · 4 mo ago

Ayepace said:
The attached document describes how to replace the small auxiliary battery in the the 2020 and before model years.

If you use a Jaguar Land Rover labeled battery (or Exide EK151 equivalent) then you only need page 4 for a step-by-step instruction list.

The rest of the document is for persons who want to use a less expensive motorcycle/motorsports battery. The Jaguar Land Rover battery is expensive in the US (> $200) compared to the UK (< $100 USD for an EK151). I did this for a total cost of about $150 for parts and tax. (I actually spent > $200 as I explored alternatives for everyone.) The only thing that would cost in the future is a battery and that would be < $100.

Read through the instructions. If you plan to do this, you can be prepared by getting the parts together before your battery fails. Get the replacement battery when it does fail or could fail based on age.

Battery removal time: about 20 minutes if you haven't done it before (excludes waiting time for the car to power down)
Battery install time: about 15 minutes (gravity helps to install the battery )
Assembling the motorcycle/motorsport battery change: about 1/2 hour if fully prepared

Thank you to @sciencegeek and @dernotte for proof reading and comments.

Thanks so much. My question, do we need to do any something like code resettings.

Ayepace

Discussion Starter · #3 · 4 mo ago

Nothing like that at all or I would have mentioned it in the document.

jsimon7777

· #4 · 4 mo ago

So something like this wouldn't work? SAE to JIS.

Gesture Wood Tire Auto part Metal

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Ayepace

Discussion Starter · #5 · 4 mo ago

No they don't work. I explored those as well as hard-to-find JIS posts to affix directly to the replacement battery. The JLR/EK151 battery posts are actually smaller than JIS.

Reactions: 1

JaggaWatt

· #6 · 4 mo ago

Has anyone else realized that these batteries do not appear to be available for purchase at dealer online websites in the USA

Ayepace

Discussion Starter · #7 · 4 mo ago

JaggaWatt said:
Has anyone else realized that these batteries do not appear to be available for purchase at dealer online websites in the USA

Yes and that is another reason to install an aftermarket, sealed AGM battery as I did here. It was shipped via US Postal Service to my remote location. No special carrier and delivery required.

Reactions: 1

JaggaWatt

· #8 · 4 mo ago

Ayepace said:
Yes and that is another reason to install an aftermarket, sealed AGM battery as I did here. It was shipped via US Postal Service to my remote location. No special carrier and delivery required.

My car is a 2020 so Im thinking that I should just buy a spare and keep at home for peace of mind.

sciencegeek

· #9 · 4 mo ago (Edited)

JaggaWatt said:
My car is a 2020 so Im thinking that I should just buy a spare and keep at home for peace of mind.

Not a bad idea ... one would want to monitor its SoC from time to time? Looks like they're lithium iron phosphate batteries?

Edit after @Ayepace 's reply: lead acid indeed, google had shown me the wrong picture for YTX14-BS

Ayepace

Discussion Starter · #10 · 4 mo ago

sciencegeek said:
Not a bad idea ... one would want to monitor its SoC from time to time? Looks like they're lithium iron phosphate batteries?

Standard AGM.

www.i-paceforum.com

Traction battery Fault error, brake pedal feel reduced...

Occurred first time in July 22. After seeing those errors , I tried to drive back home and the vehicle lost power on freeway. Towed to Jaguar West Chester, PA . Replaced Startup battery and Auxillary battery and performed updates to the following modules BCM, EPICB, EPICC, EPICD. The same error...

www.i-paceforum.com

www.i-paceforum.com

Ayepace

Discussion Starter · #11 · 4 mo ago

JaggaWatt said:
My car is a 2020 so Im thinking that I should just buy a spare and keep at home for peace of mind.

A battery just sitting around unused will go flat on its own unless kept on a low-amp battery tender.

It's life span will still be from when it was made. If you get a battery now, don't use it for 2 years for example, you've got an aged battery that will have a shorter useful life in the car. A battery that goes flat will have an even shorter life. You'll have to charge it before installing it. Some chargers won't even attempt to charge a flat battery.

If you're not at home when the car's battery fails, you've got to get home to retrieve it, get it back to the car and install it. You'd be better off carrying it in the car all the time with occasional recharging when you are home.

Just things to consider if planning to have one on stand-by.

Reactions: 1

JaggaWatt

· #12 · 4 mo ago

Ayepace said:
A battery just sitting around unused will go flat on its own unless kept on a low-amp battery tender.

It's life span will still be from when it was made. If you get a battery now, don't use it for 2 years for example, you've got an aged battery that will have a shorter useful life in the car. A battery that goes flat will have an even shorter life. You'll have to charge it before installing it. Some chargers won't even attempt to charge a flat battery.

If you're not at home when the car's battery fails, you've got to get home to retrieve it, get it back to the car and install it. You'd be better off carrying it in the car all the time with occasional recharging when you are home.

Just things to consider if planning to have one on stand-by.

I could put the spare in the frunk! I have a battery conditioner at home. Just might be worth it. In Maryland the dealerships are spotty.

tpberding

· #13 · 4 mo ago

Is there no way to monitor the state of charge of the auxiliary batteries? No read-out in the car? A test that service can do? Otherwise, it seems like we're playing the battery lottery. If it fails, you're SOL.

tpberding

· #14 · 4 mo ago

Is there no way to monitor the auxiliary batteries' health before one fails? No read-out in the car or test that service can do? Otherwise seems that we're all playing the battery lottery.

JaggaWatt

· #15 · 4 mo ago

tpberding said:
Is there no way to monitor the auxiliary batteries' health before one fails? No read-out in the car or test that service can do? Otherwise seems that we're all playing the battery lottery.

do you have MyPace or WattCatt app?

Ayepace

Discussion Starter · #16 · 4 mo ago

tpberding said:
Is there no way to monitor the auxiliary batteries' health before one fails? No read-out in the car or test that service can do? Otherwise seems that we're all playing the battery lottery.

www.i-paceforum.com

Monitoring 12V batteries

Disclaimer: I do not sell nor have any interest in products mentioned below. They are mentioned and pictured as reference material only. There are several products on the market that provide the functions mentioned. Readers may search for and purchase these or similar products at their own...

www.i-paceforum.com

www.i-paceforum.com

Pdxmattel

· #17 · 4 mo ago

tpberding said:
Is there no way to monitor the state of charge of the auxiliary batteries? No read-out in the car? A test that service can do? Otherwise, it seems like we're playing the battery lottery. If it fails, you're SOL.

I had my dealer check the 12v batteries just before the warranty expired (60k miles)... they found one battery was far below spec and replaced it

Burdito

· #18 · 4 d ago

Thank you so much for taking the time to research and write this guide. My aux battery finally died this weekend so I immediately ordered an ek151 from ebay. Got here in 3 days and I just replaced it tonight using this guide and everything (while a bit scary) went smoothly and I now have a functioning car again! This guide made what a stressful situation a lot more manageable and I really appreciate it!

Reactions: 1

Burdito

· #19 · 4 d ago

JaggaWatt said:
do you have MyPace or WattCatt app?

Ive been using wattcatt to keep an eye on mine and it was showing 13+ volts when mine failed this weekend so now I dont feel like I can trust its readings. I'll probably get an external battery monitor in the near future for better peace of mind.

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