Prime 2023 12V battery integrity on EV

So, AGM batteries are not immortal after all.

 

Reading about it, the main advantage of AGM batteries seems to be lower self-drain, ~ 2% per month vs. ~ 5% per month for a calcium battery.

AGM batteries seem to have shorter longevity vs. properly maintained flooded-cell batteries.

Does the self-drain advantage matter given that Gen 4 and Gen 5 Priuses have a high standby drain? Probably not. That would explain why Toyota might have opted for a flooded-cell battery, especially given the higher cost of AGM.