2021 Prius. My 12V battery is starting to drop in voltage more than I'd like after the car is parked for a couple of days. I am considering replacing with AGM (Yuasa brand). I understand AGM has a slightly higher terminal voltage and a lower internal resistance (allowing faster charging on short journey). Sounds good. However are there any downsides to switching to AGM other than higher price?
Other than the charging algorithms are slightly different for the two types (and thus the AGM wouldn’t be receiving the correct charge) nothing that I’ve heard of. They are close enough you probably wouldn’t see anything, but for the Gen 4 not sure what benefits you would gain.
