I'm reading that a good fully charged battery should be at 12.3 V resting. My battery has been sitting on a smart charger and maintainer and says 12V only and the charger
Find the Voltage of Car Battery at Batteries Plus
ERC Copro 4G 12.7.5AH Battery, 12 Volt
12v Aux Battery Voltage vs SOC (State of charge) information collection | Hyundai IONIQ Forum
Amazon.com: PALUMMA 24W/4.8A Dual USB Car Charger, 12V to USB Outlet with Cigarette Lighter Voltage Meter LED/LCD Display Battery Low Voltage Warning (Black) : Everything Else
What should the voltage of a fully charged lead acid battery be? - Quora