how many volts and amps in a car battery
Everyone says a car battery's voltage is 12 volts but it varies according to how full up it is with electrical charge. A fully-charged car battery in as-new condition can have a voltage of 12.6 volts when it is not delivering any load current. Some import cars only carry a nominal six volts. It will read 12.6 volts with a digital volt meter if it is fully charge and the engine is not running. 12.4 at 75% charge.
Car batteries range from 40AH to 110AH, and alternators range from 45 amps to 200 amps. If you are using a battery charger, a 10 amp charger will take 4 to 11 hours to charge the battery, a 2 amp charger will take 2-4 days.