Ioniq hybrid has no lead acid battery at all

[samwichse]

So it looks like the Ioniq hybrid has no lead acid battery at all, a first for mass market cars.

Instead, they have a built-in 12v lithium pack attached to the main hybrid battery/traction battery. That means no float charging an inefficient but tough battery chemistry all the time.

https://www.caranddriver.com/news/ho...tarter-battery

I can not find the source, but I read an article once that stated that less than 20% of the energy that goes into a typical car battery ever comes back out due to the Peukert effect and the constant maintenance of a full SOC. Does anyone have a citation about that?

Sam

[Stubby79]

https://www.otherpower.com/images/sc...Efficiency.pdf

Points out that charge efficiency over 90% SOC is under 50%. Seeing as this is where car starting batteries operate, yeah...it's pretty abysmal!

Ok, might be time to do something about that in my car...

[oil pan 4]

If all you ever do is float charge and barely ever use the battery then 20% sounds low.
A typical car battery takes about an amp to maintain float voltage. A larger truck batter could be 2 to 2.5 amps.