HYBRID 12V Battery Mystery SOLVED

[El Kabong]

In addition, one has to purchase the Windows OS.

Not true. You can run Windows without activation, it will function with some nagging but - it works.

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[GApeach]

I’ve learned a lot reading this thread. Thanks!

question: my 2022 battery has been doing ok so far (knocks on head for luck)
I do have a flash drive (music) constantly in the usb port…would that be drawing enough while driving to help the battery charge towards 100% like using the headlights?

My Mav is garaged so I haven’t been locking it overnight to reset the BMS...should I start doing that?

 

[El Kabong]

I do have a flash drive (music) constantly in the usb port…would that be drawing enough while driving to help the battery charge towards 100% like using the headlights?

No, would only pull some milliamps of power, a tiny amount.

 

[First Sergeant]

Not true. You can run Windows without activation, it will function with some nagging but - it works.

You are correct. Ran a small part time computer repair business out of my home for the last 25 years or so and still do work for neighbors/friends. A few have not wanted to pay for a license, but today one can get any Windows license activation key (digital) for about $8 bucks.

 

[El Kabong]

today one can get any Windows license activation key (digital) for about $8 bucks.

err.... there are free methods as well but - we're not on that kind of website.

 

[First Sergeant]

err.... there are free methods as well but - we're not on that kind of website.

Hahaha! As Sergeant Shultz would say, "I know nothing!!! " (no comment on any of my past indiscretions) I do have the legit sites though if anyone needs it.

 

[Packer Bill]

NOCO 5 Genius has a repair mode.

Does not say it is good for AGM. So you'll need a volt meter at the same time to check on it.

From NOCO's website: The NOCO Genius 5 Repair Mode is designed for 12-volt lead-acid batteries, including AGM, to recover them from stratification, sulfation, or low charge by using a 4-hour high-voltage recovery cycle .

 

[HeyBales]

I’ve learned a lot reading this thread. Thanks!

question: my 2022 battery has been doing ok so far (knocks on head for luck)
I do have a flash drive (music) constantly in the usb port…would that be drawing enough while driving to help the battery charge towards 100% like using the headlights?

My Mav is garaged so I haven’t been locking it overnight to reset the BMS...should I start doing that?

Locked overnight doesn't reset the BMS, or as the manual calls it - Reset the Battery Sensor.
Which really doesn't make sense anyway.
It zeros out several tracking figures dealing with your battery, after you install a new one, and need the system to start over counting. Which is in the BMS.

BMS Relearn is the term for the locked overnight.
It's not every night, but manual says really needed after you do a charge up.
Since you haven't done it yet - I'd wager it will be that 1st night

The BMS recalcing the SOC% and what it thinks are battery readings are useful to it's lackluster charging strategy.
The pre-25MY wasn't setup for specific battery spec's, like all the EB's and 25/26MY hybrids are.
So it does some test draws to try to determine them. Probably a resistance test too since so easy.
Important to know for charging levels.

If you have that power port adapter with volt reading (actually one in thread with inside temp too by Drok, very nice) - you can discern if battery good enough (doubtful) that the method may work - or not.
If it always reads 14.x V while driving - not likely going to work, because already charging voltage.
If it drops to 12.8/7 V while driving sometimes - should indeed work to get the charging going again.

I'll mention that my new warranty battery last July, took about 7 days to drop to a level I doubt this method would have worked on without a long drive.
Drove to NY over 2 days end of Oct - with float charge finally got up to 85% SOC. And on return trip also. And within 3 days it appeared that 75% SOC was the new goal and high point, perhaps because battery already a problem and just could not hold a higher charge. And it kept dropping from there.

If no power point voltage display - after some long drive home, get out your multimeter and just measure the voltage at the battery while it's still running - none of the extra measures enabled to create higher voltage. Just want to see if it's already doing higher Volts.
Don't lock the doors leaving it running!!!

 

[samspritzer]

No. Not the same.

And deep sleep is not a bad thing.
This is a GOOD THING when you are parked at airports. Deep Sleep is what allowed you to drive home from the airport.
Without deep sleep you might have had to call a tow truck.

I still get the deep sleep message every now and then. In fact yesterday after being parked in the driveway for a couple of days, I opened the driver's side door using the keypad to get something out of the truck. Closed it, locked it and 2 minutes later phone buzzes with the "dreaded" deep sleep message. I can't recall if the dome lights came on or not.

Then there are times I recall parking at the Y in the deep cold winter when I wouldn't get the message and the dome lights came on, etc.

I've pretty much conditioned myself to ignore it...

 

[doug maverick]

The DC/DC converter is the only thing that can charge a 12v battery.

But it's variable. It can output any voltage it's programed to within design limits.

For whatever reason, it's being told to output only 12.3 or 12.4 volts much of the time.

Doing one of the "tricks" mentioned forces it to put out 14.4 to 14.8 volts ALL OF THE TIME.

So here is my question : I have a cig lighter plug that displays the voltage at the cig lighter outlet. For my truck, when driving (the READY light shows on the dash) I have never seen less than 14.6v, day or night, lights on or off, long drive or short. Same results even after using my smart 3 stage battery charger to put batt in fully charged condition.

Resting voltage of that battery hovers around 12.3 +or- a bit.

I'm acting on the assumption that this original equipment battery is finally done, and just isn't holding a full charge (12.7 or more?).

Do we think my new AGM battery arriving this weekend will solve this? My truck is in a state of battery saver mode about 90% of the time.

thanks for all these threads and post. It takes a while to soak it all in.
doug

 

[Mavster Mechanic]

I’ve learned a lot reading this thread. Thanks!

question: my 2022 battery has been doing ok so far (knocks on head for luck)
I do have a flash drive (music) constantly in the usb port…would that be drawing enough while driving to help the battery charge towards 100% like using the headlights?

My Mav is garaged so I haven’t been locking it overnight to reset the BMS...should I start doing that?

Hi.

There is no magic amp draw known.
This is computer run.
It's a yes or no.

Do you have a trailer attached?
Yes = more 12v battery charging.
No = less 12v battery charging.

Do you have your headlamps on?
Yes = more 12v battery charging.
No = less 12v battery charging.

Do you have your parking lamps on?
Yes = more 12v battery charging.
No = less 12v battery charging.

DRL Daytime running lamps set, no effect.

Vent blower fan is an odd one.
Vent blower speed 1-5 no net effect.
Vent blower speed 6 or 7 = more 12v battery charging.

Using the 120 VAC powerpoint, no effect.

Using heated seats or steering wheel or radio, no effect.

 

[Mavster Mechanic]

So here is my question : I have a cig lighter plug that displays the voltage at the cig lighter outlet. For my truck, when driving (the READY light shows on the dash) I have never seen less than 14.6v, day or night, lights on or off, long drive or short. Same results even after using my smart 3 stage battery charger to put batt in fully charged condition.

Resting voltage of that battery hovers around 12.3 +or- a bit.

I'm acting on the assumption that this original equipment battery is finally done, and just isn't holding a full charge (12.7 or more?).

Do we think my new AGM battery arriving this weekend will solve this? My truck is in a state of battery saver mode about 90% of the time.

thanks for all these threads and post. It takes a while to soak it all in.
doug

Starting out with a fresh new battery; bench charge it to 100% before attaching it to your truck. They ship at about 75%. Enough to start any car if you drop it in but fucks with these new computer systems.

Keep your old one detached for a few hours while bench charging the new one. When you drop in the new one; the truck should have forgotten about the old one. Probably nothing else you need to do. But you can do the headlamp flash and brake tap dance for extra confidence if you want.

Then run your headlamps in the day all of the time or at least once a week.

I've run headlamp and/or trailer lamps for 2 weeks now. Battery at 100% for 2 weeks now. So next I will try headlamps once a week and see what happens.

 

[GApeach]

Thanks y’all for the replies. I suspect my oem battery needs to be replaced.
I’ll go for a new AGM.

thanks again

 

[First Sergeant]

Starting out with a fresh new battery; bench charge it to 100% before attaching it to your truck. They ship at about 75%. Enough to start any car if you drop it in but fucks with these new computer systems.

Keep your old one detached for a few hours while bench charging the new one. When you drop in the new one; the truck should have forgotten about the old one. Probably nothing else you need to do. But you can do the headlamp flash and brake tap dance for extra confidence if you want.

Then run your headlamps in the day all of the time or at least once a week.

I've run headlamp and/or trailer lamps for 2 weeks now. Battery at 100% for 2 weeks now. So next I will try headlamps once a week and see what happens.

I got to thinking, I run tail/park lights all the time. However, all my lights are LED. I wonder if that is enough to trigger a charge?

 

[doug maverick]

Starting out with a fresh new battery; bench charge it to 100% before attaching it to your truck. They ship at about 75%. Enough to start any car if you drop it in but fucks with these new computer systems.

Keep your old one detached for a few hours while bench charging the new one. When you drop in the new one; the truck should have forgotten about the old one. Probably nothing else you need to do. But you can do the headlamp flash and brake tap dance for extra confidence if you want.

Then run your headlamps in the day all of the time or at least once a week.

I've run headlamp and/or trailer lamps for 2 weeks now. Battery at 100% for 2 weeks now. So next I will try headlamps once a week and see what happens.

I've got it on the charger now, although I was super surprised to see it measure 12.85 right out of the box, and my smart charger said it was at 100% as soon as I attached the leads. I put it on a 2amp trickle charge any way, and let it come up to 14.7 volts.

I'll pull the old one and let the computer forget about it for a few hours.

Thanks for all your great suggestions and knowledge MM.

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