21 RX350 and a PulseTech XC400

Probably 5 weeks on 2012
(Car in the garage since driveway was redone.)
10 mins later; 30second headlight on


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145 hrs on 2012
Added more water last week
1.0 hr running errands
2.5 hrs rest and 30sec headlight on

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All week on the Batteryminder 2012.
Drove an 60 min round trip
15 hrs later and no 30 sec headlight on
Looks like it holds a charge

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I purchased a BA101 a few months ago, to supplement my Schumacher digital tester.
What is considered a good range for the resistance measurement?
 
f355spider said:
I purchased a BA101 a few months ago, to supplement my Schumacher digital tester.
What is considered a good range for the resistance measurement?
Click to expand...
The internal resistance is inversely proportional to the rated CCA. For a 585 CCA battery 4.61 mohm is great but for my 900 CCA optima battery it is terrible. For a 900 CCA a reading less than 3.00 mohm is great. U need to fully charge a new battery to baseline its internal resistance.

Read my 1st post at where I started and how I reduced the internal resistance from 5.36 to 4.61 mohm.

The goal is to use a desulfator ie BatteryMinder to achieve the lowest possible internal resistance for ur battery. It takes weeks to months and there is no guarantee ur battery is restoreable.
 
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Patrick0525 said:
The internal resistance is inversely proportional to the rated CCA. For a 585 CCA battery 4.61 mohm is great but for my 900 CCA optima battery it is terrible. For a 900 CCA a reading less than 3.00 mohm is great. U need to fully charge a new battery to baseline its internal resistance.

Read my 1st post at where I started and how I reduced the internal resistance from 5.36 to 4.61 mohm.

The goal is to use a desulfator ie BatteryMinder to achieve the lowest possible internal resistance for ur battery. It takes weeks to months and there is no guarantee ur battery is restoreable.
Click to expand...
Yup, been following this thread and understand lower is better but unclear what is the expectation.

I have a 900CCA AGM (AC Delco "made in Germany" presumably by Varta) that is 5.5 years old and reading 3.11 so I guess that is pretty good still.
I have several battery tenders, both Battery Minder (3 each) and Granite Digital "Save a Battery"(2 each) They all have desulfation as part of their algorithm. Not sure if one is better than the other...
 
f355spider said:
Yup, been following this thread and understand lower is better but unclear what is the expectation.

I have a 900CCA AGM (AC Delco "made in Germany" presumably by Varta) that is 5.5 years old and reading 3.11 so I guess that is pretty good still.
I have several battery tenders, both Battery Minder (3 each) and Granite Digital "Save a Battery"(2 each) They all have desulfation as part of their algorithm. Not sure if one is better than the other...
Click to expand...
3.11 is good for a 5yr battery. When the battery measurement gets below 400 CCA u will start experiencing starting issues. U have a long way to go. Less than 400 CCA will easily start a zero-turn mower but probably not a good idea to let ur wife drive around in unless u like receiving unexpected no start auto calls.
 
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3.5 yr old battery
Another holding charge test run
All week on the BatteryMinder 2012
Did a highway road trip: 2.5hrs
No 30sec headlight on discharge

Pic#1: 2hr rest (12.79v)
Pic#2: 16hr rest(12.65v)

Testing ability to hold a charge

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Installed a FitcamX dash camera that draws power from the RX350’s sunroof/overhead console via a supplied Y-connector. Is there a parasitic draw?
I did a 16, 24.25 and 25.5 hr measurement with at rest battery with no BatteryMinder 2012.
Also used an Amp Hound 2 tester and found zero parasitic draw from all fuses in the engine compartment box - targeting the 20 amp sunroof fuse. Found zero parasitics. Did not test the EFI engine fuses.

16hr

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24.25 hr disconnect/reconnect and re-measured #1 measurement



24.25 hr disconnect/reconnect and re-measured which is the third measurement for reproducibility. Did post the 2nd measurement and pic.

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Waited an additional 15minures
24.5 hr disconnect/reconnect and re-measured

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My AC Delco AGM (made in Germany by Varta) is coming up on 6 years old and I plug it into a Granite Digital "Save a Battery" battery tender most evenings. It has an anti sulfation program built into its algorithm, but the battery has slowly started to lose CCA on my tester in the past year. Rated at 900CCA it was always testing over 1000 for several years. But this year it has slowly dropped and a month ago was showing 874 CCA. It goes on the tender almost every evening when I get home since the pandemic in 2020...about 4 or 5 times a week I would guess.

Out of curiosity, after seeing the 874cca reading, I started using my Battery Minder 128CEC2 on the 2 amp flooded setting per the user manual instructions. Using my same testing protocol, it is now consistently reading 909 to 914cca. So one month of using the Battery Minder seems to have improved the battery condition.

Save a Battery tender keeps a battery around 13.1vt to 13.2vt during maintenance whereas the Batter Minder is around 13.50vt depending on ambient temperature of course.
 
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f355spider said:
My AC Delco AGM (made in Germany by Varta) is coming up on 6 years old and I plug it into a Granite Digital "Save a Battery" battery tender most evenings. It has an anti sulfation program built into its algorithm, but the battery has slowly started to lose CCA on my tester in the past year. Rated at 900CCA it was always testing over 1000 for several years. But this year it has slowly dropped and a month ago was showing 874 CCA. It goes on the tender almost every evening when I get home since the pandemic in 2020...about 4 or 5 times a week I would guess.

Out of curiosity, after seeing the 874cca reading, I started using my Battery Minder 128CEC2 on the 2 amp flooded setting per the user manual instructions. Using my same testing protocol, it is now consistently reading 909 to 914cca. So one month of using the Battery Minder seems to have improved the battery condition.

Save a Battery tender keeps a battery around 13.1vt to 13.2vt during maintenance whereas the Batter Minder is around 13.50vt depending on ambient temperature of course.
Click to expand...
U have a long way to go. When it is less than 450cca, staring looking for a replacement. Thanks for sharing.
 
f355spider said:
My AC Delco AGM (made in Germany by Varta) is coming up on 6 years old and I plug it into a Granite Digital "Save a Battery" battery tender most evenings. It has an anti sulfation program built into its algorithm, but the battery has slowly started to lose CCA on my tester in the past year. Rated at 900CCA it was always testing over 1000 for several years. But this year it has slowly dropped and a month ago was showing 874 CCA. It goes on the tender almost every evening when I get home since the pandemic in 2020...about 4 or 5 times a week I would guess.

Out of curiosity, after seeing the 874cca reading, I started using my Battery Minder 128CEC2 on the 2 amp flooded setting per the user manual instructions. Using my same testing protocol, it is now consistently reading 909 to 914cca. So one month of using the Battery Minder seems to have improved the battery condition.

Save a Battery tender keeps a battery around 13.1vt to 13.2vt during maintenance whereas the Batter Minder is around 13.50vt depending on ambient temperature of course.
Click to expand...
Three more weeks of intermittently running the Battery Minder 128CEC2 on my 6 year old H8 AGM and it is now up to 957 CCA. I think the Battery Minder desulfation algorithm is better than the Granite Digital "Sava a Battery" desulfation algorithm.
 
Filled with water -three weeks ago
140hrs on 2012
Immediate 30second headlight on
Garage Temp- 66F

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Proof that charging is the way to go. I’ve been seeing 100% state of health and 95-100% charge on all my cars by using a 2012 and then rotating to a Pulsetech. I don’t know that there’s anything better on the market than those 2.
 
D1dad said:
Proof that charging is the way to go. I’ve been seeing 100% state of health and 95-100% charge on all my cars by using a 2012 and then rotating to a Pulsetech. I don’t know that there’s anything better on the market than those 2.
Click to expand...
Yepp. I have been posting current battery maintenance data for one year.
 
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