The maximum voltage of a lead acid battery depends on its state of charge, but a 12V lead acid battery can reach 13.00V when fully charged.
According to a 12V Lead Acid Battery Voltage Chart:
- A fully charged 12V lead acid battery (100% capacity) has a voltage of around 13.00V.
- A completely discharged 12V lead acid battery (0% capacity) has a voltage of around 10.50V.
- A 12V AGM battery with 70% capacity measures around 12.30V.
This voltage range indicates the battery's charge level, offering a simple way to gauge battery health.
