How Much Power Does A Car Battery Have. That would mean it costs 360 to charge a depleted battery which works out to be 0036 per mile or roughly 13 kilowatt-hour per mile 33 miles per kWh. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off preferably overnight this provides you with the car battery open circuit voltage or also know as the resting voltage.
Power is the rate and which work is done or the amount of work needs to be done or can be done. But todays lead-acid batteries have only about 30 watt-hours of energy per kilogram and need to be replaced every two or three years or after as few as 15000-20000 miles. Watts is amps x volts.
But how much power can it actually store.
Watts is amps x volts. 12-volt batteries have six cells. P IV P 600 A72 V P 4320 W. But how much power can it actually store.
