E Torque 48 V Battery

[Boatbuilder88]

I’m planning to replace it as preventative maintenance here soon with a Walmart Everstart H7 / LN4 / 94R 850 CCA. It has a 4 year warranty so I’d be covered through the end of the eTorque warranty which for my JLUW is 12/2028.

Good idea! The main AGM battery in my 2019 2.0L eTorque-equipped Jeep died without warning one morning. (The Jeep was 5 years old.) Glad I was home at the time. The dash lit up like a Christmas tree and the Jeep wouldn't start. The lead acid batteries in my other vehicles would feel weak during startup when it was time to replace.

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[Tncdrew]

Personally I suggest everyone not use stop/start regardless of your engine. It just isn't worth the battery health cost.

this!
Two years ago I installed a Tazer, disabled the start/stop, and haven't looked back. Just not a fan of an engine constantly starting & stopping.

 

[Murphydog]

this!
Two years ago I installed a Tazer, disabled the start/stop, and haven't looked back. Just not a fan of an engine constantly starting & stopping.

I do this when the starter motor is doing the start/stop work. However on my eTorque equipped Rubicon the starter motor isn’t used, and is honestly nearly imperceptible

 

[Tncdrew]

I do this when the starter motor is doing the start/stop work. However on my eTorque equipped Rubicon the starter motor isn’t used, and is honestly nearly imperceptible

I totally agree with you. I also have an etorque, and yes the start/stop is butter smooth. I just choose to keep it disengaged.

 

[Pape]

As per some research start/stop is only providing good result of the engine spend more than 7 secs stop. If I know I got long stop coming I enable it. In the winder I do not need to disable the weather do it for me lol

 

[alphawolff]

I do this when the starter motor is doing the start/stop work. However on my eTorque equipped Rubicon the starter motor isn’t used, and is honestly nearly imperceptible

Maybe I'm mistaken, but using start/stop with the eTorque really shouldn't have any effect on the 12V battery at all since the smaller battery is only used for cold starts. And partial discharge/charge between 50 and 100% should be healthy for the 48V Li-Ion battery, though that's gonna happen while parked anyway.

Only con might be the 48V not charging the 12V during ESS, but I'm thinking that's probably when it auto-disables start/stop with the "not ready" message (12V needing charged by 48V, or the 48V needing charged by the belt-start generator, or steep grade, or desired cabin temp not reached).

The starter isn't the wear item, it's the 12v battery. The AGM batteries in our vehicles hate charge cycles. They like to stay topped off. If you're constantly bringing it down to 60-65% SoC due to stop/start you're going to have to replace it much sooner than you'd expect. This is why our batteries are known as "junk". If you don't use stop/start and don't let it sit for long periods of time they easily last 5 years.

If you're a stop/start enthusiast you're lucky to get two years out of them. If a vehicle comes in with <10v we replace it. We don't bother testing it as they will recharge and test just fine then be dead 3 days later.

 

[Gangplank]

The starter isn't the wear item, it's the 12v battery. The AGM batteries in our vehicles hate charge cycles. They like to stay topped off. If you're constantly bringing it down to 60-65% SoC due to stop/start you're going to have to replace it much sooner than you'd expect. This is why our batteries are known as "junk". If you don't use stop/start and don't let it sit for long periods of time they easily last 5 years.

If you're a stop/start enthusiast you're lucky to get two years out of them. If a vehicle comes in with <10v we replace it. We don't bother testing it as they will recharge and test just fine then be dead 3 days later.

Start/Stop in the eTorque is done by the 48v not the smaller battery. It’s quiet & nearly seamless as others have noted.

 

[Pape]

Actually not sure the 48v always provid power while in stop mode. I have notice some time the voltage while waiting at the light in stop mode dropping to 12.8v and other time it remains at 14.x volts. Not sure if the 48v battery go to 12.8v when the 12v battery if full or just leave it to the 12v battery when it is full

 

[Murphydog]

The starter isn't the wear item, it's the 12v battery. The AGM batteries in our vehicles hate charge cycles. They like to stay topped off. If you're constantly bringing it down to 60-65% SoC due to stop/start you're going to have to replace it much sooner than you'd expect. This is why our batteries are known as "junk". If you don't use stop/start and don't let it sit for long periods of time they easily last 5 years.

If you're a stop/start enthusiast you're lucky to get two years out of them. If a vehicle comes in with <10v we replace it. We don't bother testing it as they will recharge and test just fine then be dead 3 days later.

The 12v battery in my 2017 Ram 1500 with no start stop function died at 30 months. The 12v battery in both my Mercedes and BMW lasted the entire time I owned them, 8 and 10 years respectively. My impression is the OEM 12v batteries from Mopar are low quality.
I also understand that the 48v batteries is what restarts the eTorque engine.

 

[alphawolff]

Start/Stop in the eTorque is done by the 48v not the smaller battery. It’s quiet & nearly seamless as others have noted.

It's not the engine start. It's the 12v maintaining your interior electronics during the stop/start cycle. If you're sitting at a stop light for 4 minutes that's 4 minutes the battery is discharging under full accessory load.


The 48V pack doesn't really charge the 12v without the MGU running like an IDCM can in a 4XE.

The 12v battery in my 2017 Ram 1500 with no start stop function died at 30 months. The 12v battery in both my Mercedes and BMW lasted the entire time I owned them, 8 and 10 years respectively. My impression is the OEM 12v batteries from Mopar are low quality.
I also understand that the 48v batteries is what restarts the eTorque engine.

30 months isn't terrible depending on how it was used/stored. It's a lot better than the 12-24 months you usually get out of a normal stop/start vehicle. I replaced the factory battery in my 2011 grand Cherokee in 2021.

 

[Murphydog]

It's not the engine start. It's the 12v maintaining your interior electronics during the stop/start cycle. If you're sitting at a stop light for 4 minutes that's 4 minutes the battery is discharging under full accessory load.

The 48V pack doesn't really charge the 12v without the MGU running like an IDCM can in a 4XE.



30 months isn't terrible depending on how it was used/stored. It's a lot better than the 12-24 months you usually get out of a normal stop/start vehicle.

Thankfully we don’t have 4 minute stop lights around here. While I’ve not timed it, I think my Jeep is typically off for no longer than 30 second, and when the AC is running it seems less than that

It’s also significantly less than the 8 and 9 years out of the OEM batteries in my German cars.

 

[alphawolff]

Thankfully we don’t have 4 minute stop lights around here. While I’ve not timed it, I think my Jeep is typically off for no longer than 30 second, and when the AC is running it seems less than that

It’s also significantly less than the 8 and 9 years out of the OEM batteries in my German cars.

The E-Torque system in general has vastly improved battery life and stop/start function than the normal system. In fact the only reason it exists is because they wanted to solve the chunkiness of the standard stop/start system.

The only issue with it is it's a "hold over" technology that was implemented to solve that current stop/start issue while knowing it will be quickly replaced by the 4xe or other BEV/PHEV systems. Its why parts might be hard to find ~10-15 years down the road.

For the record, I agree our batteries are junk.

 

[dragoneggs]

Mopar online apparently has them…

https://store.mopar.com/oem-parts/m...kit-68381513aa?c=bD0yJm49U2VhcmNoIFJlc3VsdHM=

 

[Nokones]

this!
Two years ago I installed a Tazer, disabled the start/stop, and haven't looked back. Just not a fan of an engine constantly starting & stopping.

I initially did the Auto Stop/Start Harness Eliminator that remembers the last position of the feature and recalls that position on the next startup. Then a couple months later, I added the Superchips FlashCal Plus system.

 

[Tncdrew]

I initially did the Auto Stop/Start Harness Eliminator that remembers the last position of the feature and recalls that position on the next startup. Then a couple months later, I added the Superchips FlashCal Plus system.

Yep, that's how the Tazer works.

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