12v Lead Acid Battery Replacement

[SwampNut]

Mine is dual, and nearly always on a charger.

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[IGR]

Interesting indeed. Is it a Dual battery or a Single one?
How often do you L2 charge at home? Daily? Weekly?

Single battery, and I plug mine in weekly.

 

[mudito]

Single battery, and I plug mine in weekly.

Sounds about right. I would plug-in a Single battery R1 more often so the 12V is kept healthier. When you monitor the sleep cycles on Single battery, you'll see that the first day after a charge the sleep cycles are longer and after day 1 they get increasingly shorter sleep/wake cycles.

Dual batteries do the same but cycles are way longer.

I would suggest as a good practice to set your charge limit to 70% and plug-in daily if possible (maybe every other day) and monitor sleep/wake cycles. They should be longer denoting a healthier 12V battery.

(DISCLAIMER: This is just a theory of mine based on data I've seen and researched around this very forum!)

 

[mkhuffman]

Sounds about right. I would plug-in a Single battery R1 more often so the 12V is kept healthier. When you monitor the sleep cycles on Single battery, you'll see that the first day after a charge the sleep cycles are longer and after day 1 they get increasingly shorter sleep/wake cycles.

Dual batteries do the same but cycles are way longer.

I would suggest as a good practice to set your charge limit to 70% and plug-in daily if possible (maybe every other day) and monitor sleep/wake cycles. They should be longer denoting a healthier 12V battery.

(DISCLAIMER: This is just a theory of mine based on data I've seen and researched around this very forum!)

My truck sat at the airport, not plugged in, for seven days. I did not see any change in the wake frequency over the course of the week.

The day after we left it woke three times. The following day it woke twice, and next day it only woke one time. It alternated between waking twice and waking once per day over the rest of the week. The awake time was very short each time (one minute each), so I doubt it was doing any charging of the LVB. I think it woke to check with the mothership.

My truck only has 6,550 miles on it, so the LVB is fresh.

Based on the discussion in this thread I have started plugging in to L2 every time I park at home. It seems to wake a lot when at home. I think because I am going in and of range with my phone.

 

[mudito]

My truck sat at the airport, not plugged in, for seven days. I did not see any change in the wake frequency over the course of the week.

The day after we left it woke three times. The following day it woke twice, and next day it only woke one time. It alternated between waking twice and waking once per day over the rest of the week. The awake time was very short each time (one minute each), so I doubt it was doing any charging of the LVB. I think it woke to check with the mothership.

My truck only has 6,550 miles on it, so the LVB is fresh.

Based on the discussion in this thread I have started plugging in to L2 every time I park at home. It seems to wake a lot when at home. I think because I am going in and of range with my phone.

That's VERY good. Was it parking with Gear Guard On or Off?

I normally see the behavior you describe when the truck is parked with Shipping mode. In my case, it woke up ever 26 hrs in average.

 

[mkhuffman]

That's VERY good. Was it parking with Gear Guard On or Off?

I normally see the behavior you describe when the truck is parked with Shipping mode. In my case, it woke up ever 26 hrs in average.

I have GG turned off. Everything else is normal.

I got out of the truck, walked away, and heard the hoot as it locked itself. After seven days it sensed me returning as I walked up to the truck, gave me the welcome lights, automatically unlocking just like always does. (I did wonder if it would fail to wake up after being away from me that long.)

Over the period, the HVB lost 3.5% SoC.

 

[mudito]

I have GG turned off. Everything else is normal.

I got out of the truck, walked away, and heard the hoot as it locked itself. After seven days it sensed me returning as I walked up to the truck, gave me the welcome lights, automatically unlocking just like always does. (I did wonder if it would fail to wake up after being away from me that long.)

Over the period, the HVB lost 3.5% SoC.

I would definitely venture to say that 3.5% drain over 7 days is definitely an outlier Maybe a newer Gen2 thing?

 

[IGR]

Sounds about right. I would plug-in a Single battery R1 more often so the 12V is kept healthier. When you monitor the sleep cycles on Single battery, you'll see that the first day after a charge the sleep cycles are longer and after day 1 they get increasingly shorter sleep/wake cycles.

Dual batteries do the same but cycles are way longer.

I would suggest as a good practice to set your charge limit to 70% and plug-in daily if possible (maybe every other day) and monitor sleep/wake cycles. They should be longer denoting a healthier 12V battery.

(DISCLAIMER: This is just a theory of mine based on data I've seen and researched around this very forum!)

That’s an interesting theory, and it probably would help, however where I live chargers are sheared and for me it is not feasible to leave it plugged in every night.

 

[Fmc]

I am on my 2nd 12v replacement in 13 months. My commute is 2 miles and I may drive 10-20 miles/ day. I charge daily. Any recommendations on using the ODB port plug at night for better 12v health? Also is Rivian eating the costs on these 12v batteries or do they have some warranty with the manufacturer?

 

[mkhuffman]

I am on my 2nd 12v replacement in 13 months. My commute is 2 miles and I may drive 10-20 miles/ day. I charge daily. Any recommendations on using the ODB port plug at night for better 12v health? Also is Rivian eating the costs on these 12v batteries or do they have some warranty with the manufacturer?

Don you keep the truck plugged in all the time it is sitting at home? If not, definitely do that. I see you charge daily but if you unplug when charging finishes, it would be better to leave it plugged in I think.

It seems to me your use case is pretty hard on the LVB. I think a ICEV would also struggle to keep the LVB healthy with short drives like that. I would get a tender if I were you.

 

[SwampNut]

Don you keep the truck plugged in all the time it is sitting at home? If not, definitely do that. I see you charge daily but if you unplug when charging finishes, it would be better to leave it plugged in I think.

It seems to me your use case is pretty hard on the LVB. I think a ICEV would also struggle to keep the LVB healthy with short drives like that. I would get a tender if I were you.

Mine is nearly always plugged in, I’m about to get my fourth set of batteries.

 

[Fmc]

My car is in for service and I have noticed it has been asleep for 20+ hours. Maybe they have found a 12v that keeps this car asleep.

 

[zymolysis]

I am on my 2nd 12v replacement in 13 months. My commute is 2 miles and I may drive 10-20 miles/ day. I charge daily. Any recommendations on using the ODB port plug at night for better 12v health? Also is Rivian eating the costs on these 12v batteries or do they have some warranty with the manufacturer?

There is a thread here on the forums about using the ODB to connect a battery tender up to 2 or 3A. They report improvements in length of sleeping, just doing that intermittently. That should also improve 12V battery health and life.
Alternatively, you can connect a battery tender directly to the battery, and have the 120V connection for the battery tender inside the frunk. Just don't forget to unplug it.

 

[Fmc]

@zymolysis i think I am resorting to the ODB port as opposed to opening the frunk everyday. The 12v will be the death of me/RIVN. I am chalking up my early adopter pricing to be on the bleeding edge..not the leading edge.

 

[zymolysis]

@zymolysis i think I am resorting to the ODB port as opposed to opening the frunk everyday. The 12v will be the death of me/RIVN. I am chalking up my early adopter pricing to be on the bleeding edge..not the leading edge.

Do a search for that thread - lots of good information.

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