Had to replace flooded battery on my 2015 Cruze LS 1.8l. Replaced it with 760CCA AGM.
Initially, voltage on driving was 14.1 to 14.9. Now, a day or so later, it slooowly hunts between 12.5 and 14.1. Often sitting around 12.5v. Is this normal or do I have to reprogram the computer for the new battery type? Is it smart enough to try to re-learn the new battery or is it confused? If not normal, how would I fix this? Thanks Scotty for all your help with your efforts. MikeO Oakville, Ontario, CA {black}:idontknow:
or do I have to reprogram the computer for the new battery type?
On the Chevy, you shouldn’t have to reprogram for the battery type.
The only things you have to reprogram are your radio and clock.
I doubt it, I didn't find any source that say's you need to perform programing on a Chevrolet Cruze / Opel Astra (same car)
You should stick to the original battery type.
Does the Cruze computer is capable of adapting to AGM chemistry
I doubt it.
the original battery is 47 type and I am guessing is 600CCA and the new one is 48 type with 760CCA
47/48 is the "group" and it just means dimensions. Just make sure the battery sits nicely on the tray bottom and is properly secured.
The vehicle doesn't care about CCA rating.
Reading the tech data on batteries, the smaller OEM battery is wet (flooded) type and the AGM batteries have different charge and float characteristics.
The Wet cell OEM battery is fully charged at 12.6v but the AGM is full at 12.8v. Since the readings I get on my console display is going down to 12.5v while driving, that means imy AGM batt is not being fully charged. That's the root of my question.
Does the Cruze computer is capable of adapting to AGM chemistry automatically or does it still think it is dealing with a flooded battery? Also, the original battery is 47 type and I am guessing is 600CCA and the new one is 48 type with 760CCA. Internal resistance and charge rates would be different as well as chemistries.
If the cruze doesn't adapt, it will lessen the life and capacity of the new AGM battery.
Found possible culprit to the batt voltage "hunting" problems. Cruze uses AVR advanced voltage control to change charging voltage to save fuel - 1.5%.
See:
https://www.torquenews.com/119/chevy-cruze-uses-patented-regulated-voltage-control-technology
But still found no answers re: the AGM and different voltage charging settings. Still Looking.