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
Motorcycle Battery: Voltage After Charge & Discharge
Mighty Max Battery 12-Volt 50 Amps Motorcycle Battery in the Power Equipment Batteries department at Lowes.com
Mighty Max Battery 12-Volt 385 Amps Motorcycle Battery in the Power Equipment Batteries department at Lowes.com
How To Tell If Your Dead Motorcycle Battery is Still OK - YouMotorcycle