As a restaurant owner, you understand that you only make money when your restaurant is open in typical Central New York market hours. Which is why Commercial Janitorial restaurant cleaning crews will work around your schedule, overnight, early morning, daytime, weekends, etc...
The typical charging voltage is between 2.15 volts per cell (12.9 volts for a 6 cell battery) and 2.35 volts per cell (14.1 volts for a 6 cell battery). These voltages are appropriate to apply to a fully charged battery without overcharging or damage.
For a typical 12 volt battery this. voltage range will be between 12 volts to 10.5 volts. At 10.5 volts the battery is considered. fully discharged. Typical units of battery capacity are expressed as milliamp-hours or mA*h and for larger. batteries amp-hours or A*h.