What Percent Should A Car Battery Be At. Fully charged voltage. Similarly what percent does a car battery need to start.
The measurement depends on what tool you use to test your car battery. View the most popular hydrometer on amzn. Finally allowing any car battery to go completely dead will take a big chunk out of its lifespan even if it can be recharged and put back in service.
Its better to let the capacity run down to 10 or 20 then recharge to around 80.
Ad Get 10 Off When you Buy Online Pick Up In-Store Now. Among those that we have tested theres significant variation. I put together the following battery state of charge chart which indicates the state-of-charge percent as it relates to battery voltage or specific gravity. Voltages and Specific Gravity are listed for a 6-volt or 12-volt battery and battery banks of 24 and 48 volts.
