12V battery replacement poll

[21st Century Truck]

One more note: I ordered my Ohmmu in late November and it came this past week. After I installed it, I downloaded the Ohmmu Energy app and... could not connect to the battery via Bluetooth.

I then took a longer look at what I ordered. I ordered, and got the Ohmmu sodium battery. For the Lightning, Ohmmu does list a lithium battery but "orders will begin in March 2026" per their web page.

This is fine for my ends as it seems that sodium batteries do well is cold climates (we have a 3-week trip to Canada very soon). However, i do not know whether the Ohmmu lithium batteries for the Lightning are a future item, or a past / production stopped / future item.

And obviously, if You get the sodium battery don't drive Yourself crazy like I did, looking for that elusive battery Bluetooth signal... at least I chose to pop for the additional, accesory ANCEL BM200 battery stick-on monitor... now I know why the Ohmmu site suggested it.

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[mr.Magoo]

For the Lightning, Ohmmu does list a lithium battery but "orders will begin in March 2026" per their web page.
...
However, i do not know whether the Ohmmu lithium batteries for the Lightning are a future item, or a past / production stopped / future item.

It appears that this is all H3 sized Lithium batteries and not something specific to the Lightning.

 

[21st Century Truck]

It appears that this is all H3 sized Lithium batteries and not something specific to the Lightning.

Right, that makes sense.

 

[srspring551]

https://a.co/d/dpkCqDi

Nice form factor but is there one with a SAE connector? (even better would be a NOCO quick connect)

 

[Zprime29]

I'm quite surprised that my 12v battery has lasted 3 summers in the desert. My previous car, a Subaru Legacy, had to have 4 replacements in the 7 years I drove it. I'm still on my stock from the factory 12v in the lightning, started driving it daily Feb '23 and sitting around 52k miles. I have a Li-Ion jump starter in the frunk if needed. I'll wait until a battery test says it needs to go or it just gives out.

I usually go with a DieHard Gold, super easy warranty replacement at AutoZone (which I've had to do multiple times). I just checked the Ohmmu website, it's only giving a 3 year warranty for the Na-Ion battery and you have to hope they have stock + wait for shipping. A DieHard Platinum is $100 cheaper and has a full replacement warranty for 4 years. It looks like Motorcraft from Rock Auto (a further $150 cheaper) has a 2 year warranty? How does the warranty replacement work for that, can I just go to the Ford service center? Ease and convenience of warranty replacement plays a big factor for me. $110 for 2 year replacement at a Ford dealer or $250 for 4 year replacement at any AutoZone. I'm leaning towards the DieHard at AutoZone cuz I'm not a huge fan of my local dealers and AutoZones are pretty easy to find if I'm on vacation.

 

[RLXXI]

I'm quite surprised that my 12v battery has lasted 3 summers in the desert. My previous car, a Subaru Legacy, had to have 4 replacements in the 7 years I drove it. I'm still on my stock from the factory 12v in the lightning, started driving it daily Feb '23 and sitting around 52k miles. I have a Li-Ion jump starter in the frunk if needed. I'll wait until a battery test says it needs to go or it just gives out.

I usually go with a DieHard Gold, super easy warranty replacement at AutoZone (which I've had to do multiple times). I just checked the Ohmmu website, it's only giving a 3 year warranty for the Na-Ion battery and you have to hope they have stock + wait for shipping. A DieHard Platinum is $100 cheaper and has a full replacement warranty for 4 years. It looks like Motorcraft from Rock Auto (a further $150 cheaper) has a 2 year warranty? How does the warranty replacement work for that, can I just go to the Ford service center? Ease and convenience of warranty replacement plays a big factor for me. $110 for 2 year replacement at a Ford dealer or $250 for 4 year replacement at any AutoZone. I'm leaning towards the DieHard at AutoZone cuz I'm not a huge fan of my local dealers and AutoZones are pretty easy to find if I'm on vacation.

Best bet is to wait for the lfp to come in stock as it closely matches the charging system parameters of a similar lead acid battery where the sodium battery won't charge beyond about 85% with the charging specs of these vehicles. The lfp ohmmu is supposed to be heated to accommodate Northern climates.

 

[Zprime29]

Best bet is to wait for the lfp to come in stock as it closely matches the charging system parameters of a similar lead acid battery where the sodium battery won't charge beyond about 85% with the charging specs of these vehicles. The lfp ohmmu is supposed to be heated to accommodate Northern climates.

Would be nice if they offered a cheaper version for those of us in the south. (EDIT: cheaper as in a non-heated version. Though not sure how much that actually raises the cost.) I don't know if I want to stomach that asking price without a comparable warranty attached. 4 years for $500 vs 4 years for $250 DieHard...and no additional performance. Do we really think the LFP version will last?

I've had terrible luck with LED light bulbs that are supposed to last longer. It seems recessed can lighting dooms LED bulbs from heat build up. I've had to look into the non socket type replacements to get something that will actually last ( I hope ). I'm skeptical about LFP for a 12v solution, but open to being convinced.

 

[The Weatherman]

I just replaced my OEM 12v with the OHMMU 12v Li-ion with a 4year warranty and it was less than $400.00. Sure still expensive, but it is designed to work better and longer in an electric vehicle that is notoriously hard on lead acid/AGM batteries.

 

[beast]

I just had mine replaced under warranty at 31000 miles. Been through 3 hard winters so I knew it was getting close to needing to be replaced once it went into power save mode

 

[PA Lightning]

I just replaced my OEM 12v with the OHMMU 12v Li-ion with a 4year warranty and it was less than $400.00. Sure still expensive, but it is designed to work better and longer in an electric vehicle that is notoriously hard on lead acid/AGM batteries.

The fellow in post 91 reported that the OHMMU Lithium is not available until March 2026 and that he received a Sodium. Did you actually get a Lithium?

 

[The Weatherman]

The fellow in post 91 reported that the OHMMU Lithium is not available until March 2026 and that he received a Sodium. Did you actually get a Lithium?

Yes. Ordered it about 2 weeks ago. It had a 20% discount offer at that time. And it was priced at $400.00 not $479.00.

 

[Zprime29]

Yes. Ordered it about 2 weeks ago. It had a 20% discount offer at that time.

Under $400 I'd consider it, but the list price at the moment is $480. I'll have to put their site on my watch list to see how often it comes on sale.

 

[RLXXI]

Would be nice if they offered a cheaper version for those of us in the south. (EDIT: cheaper as in a non-heated version. Though not sure how much that actually raises the cost.) I don't know if I want to stomach that asking price without a comparable warranty attached. 4 years for $500 vs 4 years for $250 DieHard...and no additional performance. Do we really think the LFP version will last?

I'm skeptical about LFP for a 12v solution, but open to being convinced.

I had been using a different brand lfp but I didn't want to cut the battery box for it to fit properly so I took it back out and put the original back in. Didn't like the idea of the battery flopping around loose. I doubt the heater adds much to the cost of the battery but they will most certainly charge a premium for it. I'm in the south as well so I don't really need it to be heated.

LFP batteries typically have a life span of 10-15 years and most are warranted to at least 10 years, unsure why these Ohmmu only offer the warranty they do.

All of my solar system batteries are LFP for the lifespan they offer. Either when the time comes this oem battery dies or they come out with a lower priced LFP that'll fit proper, is when I'll jump back into one. Voltages are near identical to lead acid so there should be no need for any tweaks to the trucks charging system (if that's even possible).

 

[Karlos]

Added mine to the list of replacements, in warranty by a month. 2023 Lariet ER @ 27,745 miles. Started getting the "Battery Saver" mode last month. Truck normally sits in garage for 2 weeks while I'm away. Typically find it at ~ 60-70% SOC. OTA updates get stuck, haven't seen one go thru since July & still don't have BC 1.4 . Cheapo trickle charger didn't seem to keep up or figure how to charge it up. I'm going to try my aircraft AGM maintainer on the new one.

 

[RSMLightning25]

I chose other. I'll replace mine when I start to notice gremlins that are usually associated with a battery that's on it's way out.

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