12v Lead Acid Battery Replacement

[Rivianero]

Did you try the 12v reset in the RIDE menu?

Is there such a thing? I don't see it.
I'm on 2024.11.02. When chatting with Rivian, it seems that the 12v issue is preventing resolution allowing further updates.

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[NY_Rob]

OK, so I ended up dropping in this Lithium battery today as a replacement for the original failed OEM deep cycle lead-acid battery...

https://www.amazon.com/gp/product/B0D66QCB3L

So far, the battery warning has not resolved, however the vehicle drives normally and otherwise seems to function.

Commendations for your efforts!! love when people do their research and go with a little out of the box thinking.

I would think that the 12V warning would have resolved once it's charged sufficiently. Can you bring up the RIDE pages and make sure the vehicle is actually charging your new 12V batt?

Rivian is insane asking $800 to replace that tiny little $89 lead-acid battery! Even BMW who everyone uses as an example for crazy high service rates doesn't charge that much to replace a 12V battery. BMW charges $520 to replace the 12V battery in the i3 (which is also located in the Frunk and requires some parts removal to access).

 

[godfodder0901]

Is there such a thing? I don't see it.
I'm on 2024.11.02. When chatting with Rivian, it seems that the 12v issue is preventing resolution allowing further updates.

Yep. You have to be in service mode, then enable the RIDE menu, and it's in the low voltage section. It may not work to correct your issue, but it is there.

 

[Rivianero]

Here's a shot of the Ride dashboard for low voltage after a day of driving with then new cheapie lithium.

Charge is at 14.3v which seems a bit higher than the old battery at 13.something.

LV Maintenance Status = 1.0, which I assume is binary for "yes, needs maintenance".

For the life of me I can find no "battery reset" options in any of the Ride menus. All I see there are vehicle and infotainment resets, which I understand to be equivalents of the steering wheel and hazard button hold sequence. if anyone wants to send me a screenshot of where that exists, I'd be grateful.

 

[NY_Rob]

^ well at least you know the vehicle is charging your new 12V batt.

 

[Tlohrenz]

When my 12v battery died, Rivian paid for a rental SUV for two weeks. Yes it took them two weeks before they could see the truck. I told them this was my only vehicle. My truck was only 6 months old. Don't was under warranty.

if I was going to replace it, I'd put in a gel pack battery vs a lithium.

 

[Nixapatfan]

Is there such a thing? I don't see it.
I'm on 2024.11.02. When chatting with Rivian, it seems that the 12v issue is preventing resolution allowing further updates.

They can force push updates even with 12v fault, they did it for mine with the fault. chat with someone again to see if you find someone more willing to help you, just make sure it's connected to wifi takes a few hours to receive after they send update to see it.

 

[TXR1S]

Well I’m now discovering the joy of Rivian 12v batteries. My R1T (2.25 years old, 39k miles) has had a 12v battery warning twice. First time I submitted a ticket and service had me reset, which cleared it. It recurred 2 weeks later, but clearly batteries are getting suspect.

Batteries are technically out of warranty, and no way I am paying $800 for this.

Has anyone used the FT230D battery? It looks like the perfect replacement.

 

[Blu Angel]

I would definitely replace the original 12v battery with the light-weight one from Ohmmu.



“Upgrade your Rivian R1S or R1T 12V battery or batteries with our Lithium Iron Phosphate (LiFePO4) batteries from Ohmmu!”

Ohmmu 12V LiFePO4 batteries are lighter, more efficient, eco-friendly, have a higher usable capacity, and last 4x longer than traditional sealed lead acid (SLA) batteries.

• 4 Years Full-Replacement Limited Warranty
• Replacement to OEM Battery
• Lithium Iron Phosphate Battery Chemistry (aka LiFePO4 or LFP)
• Self-heating technology inside warms battery during charging in extreme cold conditions as an extra layer of protection.
• Proprietary 12V Lithium cell and BMS technology that is a drop-in replacement to your existing battery (no firmware changes needed)
• Compatible with the Ohmmu App, a monitoring and diagnostic tool
• Battery Management System (BMS), Bluetooth-enabled - manages cell balancing for a long service life and protects your battery from high/low voltage, overcharge, high/low temperatures, and short circuits.



https://www.ohmmu.com/product-page/12v-lithium-battery-for-r1t-r1s

 

[mkhuffman]

I would definitely replace the original 12v battery with the light-weight one from Ohmmu.

Why are you recommending this? Did you do the replacement, and can you confirm it works well over multiple seasons? If you have, please share that information.

If you just have Ohmmu marketing material, it is not convincing to me. I would stick with a factory compatible AGM battery. A 12V failure is not a pleasant experience, and most people don't want to risk that happening.

 

[kenyee]

Also Google ohmmu reviews by Tesla owners....

 

[Rivianero]

Here's a shot of the Ride dashboard for low voltage after a day of driving with then new cheapie lithium.

Charge is at 14.3v which seems a bit higher than the old battery at 13.something.

LV Maintenance Status = 1.0, which I assume is binary for "yes, needs maintenance".

For the life of me I can find no "battery reset" options in any of the Ride menus. All I see there are vehicle and infotainment resets, which I understand to be equivalents of the steering wheel and hazard button hold sequence. if anyone wants to send me a screenshot of where that exists, I'd be grateful.

FWIW, I ordered and installed the Ohmmu lithium battery this week. My R1T still displayes the dreaded "Replace 12v Battery Soon" error. Haven't been able to eliminate it with multiple resets by disconnecting the high voltage and 12v systems.

Ohmmu has been pretty responsive to my tech support requests, but we haven't quite yet fixed that error. It is definitely easier with their bluetooth app to have insights into the battery health and control output.

All in all, I'd have to say that --given that we still haven't been able to fix that error yet-- my $60 experimental lithium battery worked just as well for the week it was installed.

 

[iforbes]

I thought Rivian had to do all kinds of recalibration with the 12V replacement. How would that happen with a 3rd party replacement?

 

[MountainBikeDude]

Here's a shot of the Ride dashboard for low voltage after a day of driving with then new cheapie lithium.

Charge is at 14.3v which seems a bit higher than the old battery at 13.something.

LV Maintenance Status = 1.0, which I assume is binary for "yes, needs maintenance".

For the life of me I can find no "battery reset" options in any of the Ride menus. All I see there are vehicle and infotainment resets, which I understand to be equivalents of the steering wheel and hazard button hold sequence. if anyone wants to send me a screenshot of where that exists, I'd be grateful.

My LVMS was displaying a value of 1.0 when I dropped it off at Rivian for regular service when, shortly after dropping it off, I got a notification via the app that my 12V was in need of replacement.

Since getting my truck back with the replaced battery, the value is at 0.0. To be honest, I don't remember if anytime I was in the service menu previously over the last year or so, if it ever read anything other than 1.0 until now.

 

[Rivianero]

I thought Rivian had to do all kinds of recalibration with the 12V replacement. How would that happen with a 3rd party replacement?

I don't know anything about calibration.

From what I understand, most folks who install Ohmmu batteries have a pretty seemless experience.

My situation may be an edge case since the vehicle was left for 6 months without charging and went completely dead.

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